Sssd
Monthly
Access-control bypass in SSSD lets an already-authenticated user from a trusted identity domain reach hosts and services that Host-Based Access Control (HBAC) rules are supposed to protect. Because SSSD strips the domain qualifier and compares only short usernames during HBAC evaluation, a trusted-domain user whose short name collides with an authorized local account is silently granted that local account's access. Publicly available exploit code exists, but exploitation is not automatable and EPSS is low at 0.28% (18th percentile); exposure is limited to trust-enabled FreeIPA/IdM-style deployments that delegate host access decisions to SSSD.
Local denial of service in the SSSD autofs responder allows an authenticated user on an affected host to exhaust memory by repeatedly racing concurrent map enumeration requests against map invalidation requests. Per the assessed vector (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H), the attack requires local, valid credentials and depends on winning a narrow timing window, so successful sustained exploitation is non-deterministic; hosts that do not run the autofs responder are not exposed. Impact is confined to availability - leaked memory accumulates until the autofs service is degraded or crashes - with no confidentiality or integrity effect. No public exploit code has been identified and there is no confirmed active exploitation (no CISA KEV listing), and the 4.7 base score reflects the local, high-complexity prerequisites rather than the broad enterprise presence of SSSD.
Information disclosure in SSSD deployments configured to use Microsoft Entra ID as their identity backend, where a local low-privileged user can submit a crafted lookup request that is incorporated unsanitized into a directory query filter, manipulating the query logic to return directory data outside the requester's intended scope. Only hosts explicitly configured with the Entra ID backend are affected; standard AD, LDAP, or IPA backend deployments are not. Exploitation requires a pre-existing local account with low privileges (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N) and there is no remote path, so this is assessed as a moderate-severity, low-urgency issue with no public exploit identified at time of analysis.
Memory exhaustion in the SSSD (System Security Services Daemon) can be triggered by an unauthenticated local attacker who repeatedly initiates Identity Provider (IdP) pre-authentication flows without completing them, causing uncleared in-memory state to accumulate until authentication services degrade or terminate (denial of service, CVSS 6.2). The flaw (CWE-770) affects SSSD on Red Hat Enterprise Linux 6, 7, 8, 9, and 10 as well as Red Hat OpenShift Container Platform 4, but only when IdP authentication is explicitly enabled, which is not the default configuration. No public exploit code or confirmed active exploitation (CISA KEV) was identified at time of analysis.
Denial of service in sssd passkey authentication handling allows any local user to crash the PAM responder by sending a crafted PAM request. The flaw, a missing state validation check leading to an uninitialized pointer dereference (CWE-476), affects sssd on Red Hat Enterprise Linux 6 through 10 and OpenShift Container Platform 4 when passkey authentication is enabled-a non-default configuration. With a CVSS score of 6.2 (AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), impact is limited to availability; no public exploit has been identified at time of analysis, and exploitation requires local access and the passkey feature to be active.
A local denial of service in SSSD's Name Service Switch (NSS) responder lets an attacker who can reach the responder's UNIX socket crash the name-resolution service by sending a crafted request containing an undersized packet header, which causes an integer underflow followed by an out-of-bounds read during packet parsing. Affected deployments are Red Hat Enterprise Linux 6, 7, 8, 9, and 10, plus Red Hat OpenShift Container Platform 4 nodes running SSSD. The impact is availability-only (CVSS 5.5, AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H), exploitation requires prior local access and socket reachability, and no public exploit identified at time of analysis.
Unprivileged local users can exhaust memory in the SSSD NSS responder by repeatedly requesting lookups for nonexistent entries, causing denial of service on Red Hat Enterprise Linux 6 through 10 and Red Hat OpenShift Container Platform 4. The negative cache in SSSD lacks a bound on total stored entries and only evicts expired records when an existing key is rechecked, so the cache grows until the responder becomes unresponsive or terminates. This is a local, availability-only issue requiring an authenticated account (CVSS 5.5, PR:L); no public exploit code or active exploitation is identified at time of analysis.
Denial of service in SSSD allows a local, already-authenticated user who can reach the PAM responder and complete a GSSAPI authentication request to send a follow-up request over the same connection, dereferencing freed cached connection state and terminating the service, which disrupts system authentication. Per the authoritative assessment the issue is rated CVSS 4.7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H): it is local-only, requires valid low-level credentials on the host, and is constrained by high attack complexity because the dangling-pointer dereference depends on request timing and sequencing over a reused connection. Impact is availability-only - no confidentiality or integrity effect - and no public exploit identified at time of analysis (no CISA KEV listing and no publicly available exploit code in the provided intelligence).
Denial of service in SSSD's autofs responder allows a local attacker with an existing account on the host to crash the responder process by writing a specially crafted request containing an invalid packet length to its UNIX domain socket. The malformed length triggers an integer underflow that produces an out-of-bounds read (CWE-125), terminating the responder and disrupting automount map lookups; there is no confidentiality or integrity impact and no remote vector. Exploitation requires the autofs responder to be enabled in sssd.conf and local reachability of its socket (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, 5.5); no public exploit code and no confirmed active exploitation were identified at time of analysis. Red Hat Enterprise Linux 6 through 10 and OpenShift Container Platform 4 (via packaged SSSD) are listed as affected.
Access control bypass in SSSD when configured with non-default ordering that evaluates password-expiration warnings before restrictive access rules allows remote authenticated users with expired passwords to gain unauthorized access to protected systems via alternative authentication methods such as SSH public key authentication. This flaw (CWE-393) affects Red Hat Enterprise Linux 6 through 10 and OpenShift Container Platform 4 deployments using LDAP access control. Exploitation requires a specific non-default configuration, an expired password, and a non-password authentication path, making it a moderate conditional risk; no public exploit identified at time of analysis.
The SSSD Kerberos Credential Manager (KCM) responder can be crashed by an authenticated local user who holds a renewable Kerberos ticket-granting ticket, because a deferred callback in the TGT renewal path dereferences memory that has already been freed. Exploitation is conditional on the host being explicitly configured for KCM-based credential renewal (a non-default, feature-dependent prerequisite), and the assessed vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H (4.7) reflects local access, high attack complexity, and an availability-only impact confined to the sssd-kcm service. There is no public exploit identified at time of analysis and no confirmed active exploitation (CISA KEV); overall this is a medium/low-priority denial-of-service issue rather than a high-CVSS/low-real-risk outlier.
Crashing the SSSD autofs responder process via a crafted request to its UNIX socket allows a local, low-privileged attacker to cause a denial of service on affected Red Hat Enterprise Linux 6 through 10 and OpenShift Container Platform 4 systems. The vulnerability stems from improper buffer offset calculation during request parsing, leading to an out-of-bounds read (CWE-125) that terminates the responder process; it carries a CVSS 3.3 (Low) score with no confidentiality or integrity impact. No public exploit code or active exploitation (CISA KEV) has been identified at time of analysis, and the autofs responder service must be enabled for the flaw to be exploitable.
Deleted or deprovisioned users can retain authorization on hosts running SSSD with the LDAP access provider when ldap_access_order includes ppolicy or lockout, because a user lookup that returns zero results trips a fail-open path that reports success and caches an allow decision. A remote attacker who already holds valid account context on the SSSD-managed host (authenticated, PR:L) can exploit this after offboarding to keep reading information and make limited modifications, giving low confidentiality and integrity impact (CVSS 3.1 5.4 Medium). The flaw only affects non-default access configurations that explicitly enable ppolicy/lockout ordering, and no public exploit identified at time of analysis.
Local unprivileged users on hosts running the System Security Services Daemon (SSSD) can crash or destabilize the NSS responder by sending a crafted zero-length request to its socket, degrading name-service lookups for every process on the machine. The defect is an integer underflow (CWE-191) in the responder's request parsing, and it is scored CVSS 4.0 because only availability is impacted and the attack requires local access to the host. There is no evidence of active exploitation or public exploit code at the time of analysis, and no vendor-listed fix version is available in the supplied intelligence.
A local denial-of-service flaw in SSSD (System Security Services Daemon) lets an attacker who can connect to the PAM responder socket crash the responder by sending a crafted protocol request that omits the service item while the pam_app_services option is enabled, triggering a NULL pointer dereference. Only availability is affected (CVSS 5.5, C:N/I:N/A:H), but a crash of the PAM responder disrupts authentication on the host until the service is restarted. No public exploit code has been identified at time of analysis and the flaw is not listed in CISA KEV; EPSS data was not provided in the source feeds.
A flaw was found in SSSD, where the sssctl command was vulnerable to shell command injection via the logs-fetch and cache-expire subcommands. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
A vulnerability was found in sssd. Rated medium severity (CVSS 5.2), this vulnerability is low attack complexity. This Exposure of Sensitive Information vulnerability could allow attackers to access sensitive data that should not be disclosed.
sssd versions from 1.13.0 to before 2.0.0 did not properly restrict access to the infopipe according to the "allowed_uids" configuration parameter. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
The UNIX pipe which sudo uses to contact SSSD and read the available sudo rules from SSSD has too wide permissions, which means that anyone who can send a message using the same raw protocol that. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Memory leak in the Privilege Attribute Certificate (PAC) responder plugin (sssd_pac_plugin.so) in System Security Services Daemon (SSSD) 1.10 before 1.13.1 allows remote authenticated users to cause. Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The System Security Services Daemon (SSSD) 1.11.6 does not properly identify group membership when a non-POSIX group is in a group membership chain, which allows local users to bypass access. Rated low severity (CVSS 3.3). No vendor patch available.
The Simple Access Provider in System Security Services Daemon (SSSD) 1.9.0 through 1.9.4, when the Active Directory provider is used, does not properly enforce the simple_deny_groups option, which. Rated medium severity (CVSS 4.9), this vulnerability is remotely exploitable.
The (1) sss_autofs_cmd_getautomntent and (2) sss_autofs_cmd_getautomntbyname function in responder/autofs/autofssrv_cmd.c and the (3) ssh_cmd_parse_request function in responder/ssh/sshsrv_cmd.c in. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
System Security Services Daemon (SSSD) before 1.9.4, when (1) creating, (2) copying, or (3) removing a user home directory tree, allows local users to create, modify, or delete arbitrary files via a. Rated low severity (CVSS 3.7). No vendor patch available.
Access-control bypass in SSSD lets an already-authenticated user from a trusted identity domain reach hosts and services that Host-Based Access Control (HBAC) rules are supposed to protect. Because SSSD strips the domain qualifier and compares only short usernames during HBAC evaluation, a trusted-domain user whose short name collides with an authorized local account is silently granted that local account's access. Publicly available exploit code exists, but exploitation is not automatable and EPSS is low at 0.28% (18th percentile); exposure is limited to trust-enabled FreeIPA/IdM-style deployments that delegate host access decisions to SSSD.
Local denial of service in the SSSD autofs responder allows an authenticated user on an affected host to exhaust memory by repeatedly racing concurrent map enumeration requests against map invalidation requests. Per the assessed vector (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H), the attack requires local, valid credentials and depends on winning a narrow timing window, so successful sustained exploitation is non-deterministic; hosts that do not run the autofs responder are not exposed. Impact is confined to availability - leaked memory accumulates until the autofs service is degraded or crashes - with no confidentiality or integrity effect. No public exploit code has been identified and there is no confirmed active exploitation (no CISA KEV listing), and the 4.7 base score reflects the local, high-complexity prerequisites rather than the broad enterprise presence of SSSD.
Information disclosure in SSSD deployments configured to use Microsoft Entra ID as their identity backend, where a local low-privileged user can submit a crafted lookup request that is incorporated unsanitized into a directory query filter, manipulating the query logic to return directory data outside the requester's intended scope. Only hosts explicitly configured with the Entra ID backend are affected; standard AD, LDAP, or IPA backend deployments are not. Exploitation requires a pre-existing local account with low privileges (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N) and there is no remote path, so this is assessed as a moderate-severity, low-urgency issue with no public exploit identified at time of analysis.
Memory exhaustion in the SSSD (System Security Services Daemon) can be triggered by an unauthenticated local attacker who repeatedly initiates Identity Provider (IdP) pre-authentication flows without completing them, causing uncleared in-memory state to accumulate until authentication services degrade or terminate (denial of service, CVSS 6.2). The flaw (CWE-770) affects SSSD on Red Hat Enterprise Linux 6, 7, 8, 9, and 10 as well as Red Hat OpenShift Container Platform 4, but only when IdP authentication is explicitly enabled, which is not the default configuration. No public exploit code or confirmed active exploitation (CISA KEV) was identified at time of analysis.
Denial of service in sssd passkey authentication handling allows any local user to crash the PAM responder by sending a crafted PAM request. The flaw, a missing state validation check leading to an uninitialized pointer dereference (CWE-476), affects sssd on Red Hat Enterprise Linux 6 through 10 and OpenShift Container Platform 4 when passkey authentication is enabled-a non-default configuration. With a CVSS score of 6.2 (AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), impact is limited to availability; no public exploit has been identified at time of analysis, and exploitation requires local access and the passkey feature to be active.
A local denial of service in SSSD's Name Service Switch (NSS) responder lets an attacker who can reach the responder's UNIX socket crash the name-resolution service by sending a crafted request containing an undersized packet header, which causes an integer underflow followed by an out-of-bounds read during packet parsing. Affected deployments are Red Hat Enterprise Linux 6, 7, 8, 9, and 10, plus Red Hat OpenShift Container Platform 4 nodes running SSSD. The impact is availability-only (CVSS 5.5, AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H), exploitation requires prior local access and socket reachability, and no public exploit identified at time of analysis.
Unprivileged local users can exhaust memory in the SSSD NSS responder by repeatedly requesting lookups for nonexistent entries, causing denial of service on Red Hat Enterprise Linux 6 through 10 and Red Hat OpenShift Container Platform 4. The negative cache in SSSD lacks a bound on total stored entries and only evicts expired records when an existing key is rechecked, so the cache grows until the responder becomes unresponsive or terminates. This is a local, availability-only issue requiring an authenticated account (CVSS 5.5, PR:L); no public exploit code or active exploitation is identified at time of analysis.
Denial of service in SSSD allows a local, already-authenticated user who can reach the PAM responder and complete a GSSAPI authentication request to send a follow-up request over the same connection, dereferencing freed cached connection state and terminating the service, which disrupts system authentication. Per the authoritative assessment the issue is rated CVSS 4.7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H): it is local-only, requires valid low-level credentials on the host, and is constrained by high attack complexity because the dangling-pointer dereference depends on request timing and sequencing over a reused connection. Impact is availability-only - no confidentiality or integrity effect - and no public exploit identified at time of analysis (no CISA KEV listing and no publicly available exploit code in the provided intelligence).
Denial of service in SSSD's autofs responder allows a local attacker with an existing account on the host to crash the responder process by writing a specially crafted request containing an invalid packet length to its UNIX domain socket. The malformed length triggers an integer underflow that produces an out-of-bounds read (CWE-125), terminating the responder and disrupting automount map lookups; there is no confidentiality or integrity impact and no remote vector. Exploitation requires the autofs responder to be enabled in sssd.conf and local reachability of its socket (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, 5.5); no public exploit code and no confirmed active exploitation were identified at time of analysis. Red Hat Enterprise Linux 6 through 10 and OpenShift Container Platform 4 (via packaged SSSD) are listed as affected.
Access control bypass in SSSD when configured with non-default ordering that evaluates password-expiration warnings before restrictive access rules allows remote authenticated users with expired passwords to gain unauthorized access to protected systems via alternative authentication methods such as SSH public key authentication. This flaw (CWE-393) affects Red Hat Enterprise Linux 6 through 10 and OpenShift Container Platform 4 deployments using LDAP access control. Exploitation requires a specific non-default configuration, an expired password, and a non-password authentication path, making it a moderate conditional risk; no public exploit identified at time of analysis.
The SSSD Kerberos Credential Manager (KCM) responder can be crashed by an authenticated local user who holds a renewable Kerberos ticket-granting ticket, because a deferred callback in the TGT renewal path dereferences memory that has already been freed. Exploitation is conditional on the host being explicitly configured for KCM-based credential renewal (a non-default, feature-dependent prerequisite), and the assessed vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H (4.7) reflects local access, high attack complexity, and an availability-only impact confined to the sssd-kcm service. There is no public exploit identified at time of analysis and no confirmed active exploitation (CISA KEV); overall this is a medium/low-priority denial-of-service issue rather than a high-CVSS/low-real-risk outlier.
Crashing the SSSD autofs responder process via a crafted request to its UNIX socket allows a local, low-privileged attacker to cause a denial of service on affected Red Hat Enterprise Linux 6 through 10 and OpenShift Container Platform 4 systems. The vulnerability stems from improper buffer offset calculation during request parsing, leading to an out-of-bounds read (CWE-125) that terminates the responder process; it carries a CVSS 3.3 (Low) score with no confidentiality or integrity impact. No public exploit code or active exploitation (CISA KEV) has been identified at time of analysis, and the autofs responder service must be enabled for the flaw to be exploitable.
Deleted or deprovisioned users can retain authorization on hosts running SSSD with the LDAP access provider when ldap_access_order includes ppolicy or lockout, because a user lookup that returns zero results trips a fail-open path that reports success and caches an allow decision. A remote attacker who already holds valid account context on the SSSD-managed host (authenticated, PR:L) can exploit this after offboarding to keep reading information and make limited modifications, giving low confidentiality and integrity impact (CVSS 3.1 5.4 Medium). The flaw only affects non-default access configurations that explicitly enable ppolicy/lockout ordering, and no public exploit identified at time of analysis.
Local unprivileged users on hosts running the System Security Services Daemon (SSSD) can crash or destabilize the NSS responder by sending a crafted zero-length request to its socket, degrading name-service lookups for every process on the machine. The defect is an integer underflow (CWE-191) in the responder's request parsing, and it is scored CVSS 4.0 because only availability is impacted and the attack requires local access to the host. There is no evidence of active exploitation or public exploit code at the time of analysis, and no vendor-listed fix version is available in the supplied intelligence.
A local denial-of-service flaw in SSSD (System Security Services Daemon) lets an attacker who can connect to the PAM responder socket crash the responder by sending a crafted protocol request that omits the service item while the pam_app_services option is enabled, triggering a NULL pointer dereference. Only availability is affected (CVSS 5.5, C:N/I:N/A:H), but a crash of the PAM responder disrupts authentication on the host until the service is restarted. No public exploit code has been identified at time of analysis and the flaw is not listed in CISA KEV; EPSS data was not provided in the source feeds.
A flaw was found in SSSD, where the sssctl command was vulnerable to shell command injection via the logs-fetch and cache-expire subcommands. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
A vulnerability was found in sssd. Rated medium severity (CVSS 5.2), this vulnerability is low attack complexity. This Exposure of Sensitive Information vulnerability could allow attackers to access sensitive data that should not be disclosed.
sssd versions from 1.13.0 to before 2.0.0 did not properly restrict access to the infopipe according to the "allowed_uids" configuration parameter. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
The UNIX pipe which sudo uses to contact SSSD and read the available sudo rules from SSSD has too wide permissions, which means that anyone who can send a message using the same raw protocol that. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Memory leak in the Privilege Attribute Certificate (PAC) responder plugin (sssd_pac_plugin.so) in System Security Services Daemon (SSSD) 1.10 before 1.13.1 allows remote authenticated users to cause. Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The System Security Services Daemon (SSSD) 1.11.6 does not properly identify group membership when a non-POSIX group is in a group membership chain, which allows local users to bypass access. Rated low severity (CVSS 3.3). No vendor patch available.
The Simple Access Provider in System Security Services Daemon (SSSD) 1.9.0 through 1.9.4, when the Active Directory provider is used, does not properly enforce the simple_deny_groups option, which. Rated medium severity (CVSS 4.9), this vulnerability is remotely exploitable.
The (1) sss_autofs_cmd_getautomntent and (2) sss_autofs_cmd_getautomntbyname function in responder/autofs/autofssrv_cmd.c and the (3) ssh_cmd_parse_request function in responder/ssh/sshsrv_cmd.c in. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
System Security Services Daemon (SSSD) before 1.9.4, when (1) creating, (2) copying, or (3) removing a user home directory tree, allows local users to create, modify, or delete arbitrary files via a. Rated low severity (CVSS 3.7). No vendor patch available.