Mit

CVE-2026-40355 Apr 28, 00:00 HIGH PATCH CISA This Week

Remote denial of service in MIT Kerberos 5 (krb5) before 1.22.3 lets an unauthenticated attacker crash any GSS-API acceptor that has a NegoEx mechanism registered in /etc/gss/mech. Sending a malformed NegoEx token to an application that calls gss_accept_sec_context() triggers a NULL pointer dereference in parse_nego_message, terminating the process (CWE-476). No public exploit identified at time of analysis; EPSS is low (0.07%) and CISA SSVC lists exploitation as proof-of-concept only, with technical impact rated partial and not automatable.

CVE-2026-40356 Apr 28, 00:00 HIGH PATCH This Week

Remote denial of service in MIT Kerberos 5 (krb5) before 1.22.3 allows an unauthenticated network attacker to crash any application that calls gss_accept_sec_context() on a host where a NegoEx mechanism is registered in /etc/gss/mech. A crafted NegoEx token triggers an integer underflow leading to an out-of-bounds read in parse_message(), terminating the GSS-API acceptor process. No public exploit is identified at time of analysis, EPSS risk is low (0.07%), and CISA SSVC scores exploitation as 'none'.

CVE-2024-37371 Jun 28, 23:15 CRITICAL PATCH Act Now

In MIT Kerberos 5 (aka krb5) before 1.21.3, an attacker can cause invalid memory reads during GSS message token handling by sending message tokens with invalid length fields. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Out-of-bounds Read vulnerability could allow attackers to read data from memory outside the intended buffer boundaries.

CVE-2024-37370 Jun 28, 22:15 HIGH PATCH This Week

In MIT Kerberos 5 (aka krb5) before 1.21.3, an attacker can modify the plaintext Extra Count field of a confidential GSS krb5 wrap token, causing the unwrapped token to appear truncated to the. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

CVE-2024-26462 Feb 29, 01:44 MEDIUM POC This Month

Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/kdc/ndr.c. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.

CVE-2024-26461 Feb 29, 01:44 HIGH POC This Week

Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/lib/gssapi/krb5/k5sealv3.c. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

CVE-2024-26458 Feb 29, 01:44 MEDIUM POC This Month

Kerberos 5 (aka krb5) 1.21.2 contains a memory leak in /krb5/src/lib/rpc/pmap_rmt.c. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

CVE-2023-39975 Aug 16, 15:15 HIGH PATCH This Week

kdc/do_tgs_req.c in MIT Kerberos 5 (aka krb5) 1.21 before 1.21.2 has a double free that is reachable if an authenticated user can trigger an authorization-data handling failure. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity.

CVE-2023-36054 Aug 07, 19:15 MEDIUM PATCH This Month

lib/kadm5/kadm_rpc_xdr.c in MIT Kerberos 5 (aka krb5) before 1.20.2 and 1.21.x before 1.21.1 frees an uninitialized pointer. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.

CVE-2022-42898 Dec 25, 06:15 HIGH POC PATCH This Week

PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server). Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

CVE-2022-39028 Aug 30, 05:15 HIGH POC PATCH This Week

telnetd in GNU Inetutils through 2.3, MIT krb5-appl through 1.0.3, and derivative works has a NULL pointer dereference via 0xff 0xf7 or 0xff 0xf8. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

CVE-2021-37750 Aug 23, 05:15 MEDIUM PATCH This Month

The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer dereference in kdc/do_tgs_req.c via a FAST inner body that lacks a server. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.

CVE-2021-36222 Jul 22, 18:15 HIGH PATCH This Week

ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

CVE-2021-32471 May 10, 05:15 HIGH POC This Week

Insufficient input validation in the Marvin Minsky 1967 implementation of the Universal Turing Machine allows program users to execute arbitrary code via crafted data. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.

CVE-2020-28196 Nov 06, 08:15 HIGH PATCH This Week

MIT Kerberos 5 (aka krb5) before 1.17.2 and 1.18.x before 1.18.3 allows unbounded recursion via an ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1_encode.c support for BER indefinite. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

CVE-2020-7750 Oct 21, 17:15 npm CRITICAL POC PATCH Act Now

This affects the package scratch-svg-renderer before 0.2.0-prerelease.20201019174008. Rated critical severity (CVSS 9.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.

CVE-2020-14000 Jul 16, 15:15 npm CRITICAL PATCH Act Now

MIT Lifelong Kindergarten Scratch scratch-vm before 0.2.0-prerelease.20200714185213 loads extension URLs from untrusted project.json files with certain _ characters, resulting in remote code. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

CVE-2019-14844 Sep 26, 12:15 HIGH PATCH This Week

A flaw was found in, Fedora versions of krb5 from 1.16.1 to, including 1.17.x, in the way a Kerberos client could crash the KDC by sending one of the RFC 4556 "enctypes". Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

CVE-2018-20217 Dec 26, 21:29 MEDIUM PATCH This Month

A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 (aka krb5) before 1.17. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable.

CVE-2018-5730 Mar 06, 20:29 LOW PATCH Monitor

MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to circumvent a DN containership check by supplying both a "linkdn" and. Rated low severity (CVSS 3.8), this vulnerability is remotely exploitable, low attack complexity.

CVE-2018-5729 Mar 06, 20:29 MEDIUM PATCH This Month

MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to cause a denial of service (NULL pointer dereference) or bypass a DN container. Rated medium severity (CVSS 4.7), this vulnerability is remotely exploitable, low attack complexity.

CVE-2018-5710 Jan 16, 09:29 MEDIUM This Month

An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

CVE-2018-5709 Jan 16, 09:29 HIGH This Week

An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

CVE-2017-15088 Nov 23, 17:29 CRITICAL PATCH Act Now

plugins/preauth/pkinit/pkinit_crypto_openssl.c in MIT Kerberos 5 (aka krb5) through 1.15.2 mishandles Distinguished Name (DN) fields, which allows remote attackers to execute arbitrary code or cause. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

CVE-2017-11462 Sep 13, 16:29 CRITICAL PATCH Act Now

Double free vulnerability in MIT Kerberos 5 (aka krb5) allows attackers to have unspecified impact via vectors involving automatic deletion of security contexts on error. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

CVE-2017-11368 Aug 09, 18:29 MEDIUM PATCH This Month

In MIT Kerberos 5 (aka krb5) 1.7 and later, an authenticated attacker can cause a KDC assertion failure by sending invalid S4U2Self or S4U2Proxy requests. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.

CVE-2016-3120 Aug 01, 02:59 MEDIUM This Month

The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrict_anonymous_to_tgt is enabled, uses. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

CVE-2016-3119 Mar 26, 01:59 MEDIUM PATCH This Month

The process_db_args function in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in the LDAP KDB module in kadmind in MIT Kerberos 5 (aka krb5) through 1.13.4 and 1.14.x through 1.14.1 mishandles the. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable.

CVE-2015-8631 Feb 13, 02:59 MEDIUM PATCH This Month

Multiple memory leaks in kadmin/server/server_stubs.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13.4 and 1.14.x before 1.14.1 allow remote authenticated users to cause a denial of service. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.

CVE-2015-8630 Feb 13, 02:59 HIGH PATCH This Week

The (1) kadm5_create_principal_3 and (2) kadm5_modify_principal functions in lib/kadm5/srv/svr_principal.c in kadmind in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.4 and 1.14.x before. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

CVE-2015-8629 Feb 13, 02:59 MEDIUM PATCH This Month

The xdr_nullstring function in lib/kadm5/kadm_rpc_xdr.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13.4 and 1.14.x before 1.14.1 does not verify whether '\0' characters exist as expected, which. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable. This Out-of-bounds Read vulnerability could allow attackers to read data from memory outside the intended buffer boundaries.

CVE-2015-2698 Nov 13, 03:59 HIGH This Week

The iakerb_gss_export_sec_context function in lib/gssapi/krb5/iakerb.c in MIT Kerberos 5 (aka krb5) 1.14 pre-release 2015-09-14 improperly accesses a certain pointer, which allows remote. Rated high severity (CVSS 8.5), this vulnerability is remotely exploitable. No vendor patch available.

CVE-2015-2697 Nov 09, 03:59 MEDIUM PATCH This Month

The build_principal_va function in lib/krb5/krb/bld_princ.c in MIT Kerberos 5 (aka krb5) before 1.14 allows remote authenticated users to cause a denial of service (out-of-bounds read and KDC crash). Rated medium severity (CVSS 4.0), this vulnerability is remotely exploitable, low attack complexity.

CVE-2015-2696 Nov 09, 03:59 HIGH PATCH This Week

lib/gssapi/krb5/iakerb.c in MIT Kerberos 5 (aka krb5) before 1.14 relies on an inappropriate context handle, which allows remote attackers to cause a denial of service (incorrect pointer read and. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable.

CVE-2015-2695 Nov 09, 03:59 MEDIUM PATCH This Month

lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) before 1.14 relies on an inappropriate context handle, which allows remote attackers to cause a denial of service (incorrect pointer read. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity.

CVE-2015-2694 May 25, 19:59 MEDIUM PATCH This Month

The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploitable.

CVE-2014-5355 Feb 20, 11:59 MEDIUM This Month

MIT Kerberos 5 (aka krb5) through 1.13.1 incorrectly expects that a krb5_read_message data field is represented as a string ending with a '\0' character, which allows remote attackers to (1) cause a. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

CVE-2014-9423 Feb 19, 11:59 MEDIUM This Month

The svcauth_gss_accept_sec_context function in lib/rpc/svc_auth_gss.c in MIT Kerberos 5 (aka krb5) 1.11.x through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 transmits uninitialized. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

CVE-2014-9422 Feb 19, 11:59 MEDIUM This Month

The check_rpcsec_auth function in kadmin/server/kadm_rpc_svc.c in kadmind in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 allows remote authenticated. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable. No vendor patch available.

CVE-2014-9421 Feb 19, 11:59 CRITICAL Act Now

The auth_gssapi_unwrap_data function in lib/rpc/auth_gssapi_misc.c in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 does not properly handle partial XDR. Rated critical severity (CVSS 9.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

CVE-2014-5352 Feb 19, 11:59 CRITICAL PATCH Act Now

The krb5_gss_process_context_token function in lib/gssapi/krb5/process_context_token.c in the libgssapi_krb5 library in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x. Rated critical severity (CVSS 9.0), this vulnerability is remotely exploitable, low attack complexity.

CVE-2014-5354 Dec 16, 23:59 LOW Monitor

plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.1, when the KDC uses LDAP, allows remote authenticated users to cause a denial of service. Rated low severity (CVSS 3.5), this vulnerability is remotely exploitable. No vendor patch available.

CVE-2014-5353 Dec 16, 23:59 LOW PATCH Monitor

The krb5_ldap_get_password_policy_from_dn function in plugins/kdb/ldap/libkdb_ldap/ldap_pwd_policy.c in MIT Kerberos 5 (aka krb5) before 1.13.1, when the KDC uses LDAP, allows remote authenticated. Rated low severity (CVSS 3.5), this vulnerability is remotely exploitable. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.

CVE-2014-5351 Oct 10, 01:55 LOW Monitor

The kadm5_randkey_principal_3 function in lib/kadm5/srv/svr_principal.c in kadmind in MIT Kerberos 5 (aka krb5) before 1.13 sends old keys in a response to a -randkey -keepold request, which allows. Rated low severity (CVSS 2.1), this vulnerability is remotely exploitable. No vendor patch available.

CVE-2014-4345 Aug 14, 05:01 HIGH Act Now

Off-by-one error in the krb5_encode_krbsecretkey function in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in the LDAP KDB module in kadmind in MIT Kerberos 5 (aka krb5) 1.6.x through 1.11.x before. Rated high severity (CVSS 8.5), this vulnerability is remotely exploitable. Epss exploitation probability 11.3% and no vendor patch available.

CVE-2014-4344 Aug 14, 05:01 HIGH PATCH This Week

The acc_ctx_cont function in the SPNEGO acceptor in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.5.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of. Rated high severity (CVSS 7.8), this vulnerability is remotely exploitable, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.

CVE-2014-4343 Aug 14, 05:01 HIGH PATCH This Week

Double free vulnerability in the init_ctx_reselect function in the SPNEGO initiator in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.10.x through 1.12.x before 1.12.2 allows remote. Rated high severity (CVSS 7.6), this vulnerability is remotely exploitable.

CVE-2014-4342 Jul 20, 11:12 MEDIUM PATCH This Month

MIT Kerberos 5 (aka krb5) 1.7.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of service (buffer over-read or NULL pointer dereference, and application crash) by injecting. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. This Buffer Overflow vulnerability could allow attackers to corrupt memory to execute arbitrary code or crash the application.

CVE-2014-4341 Jul 20, 11:12 MEDIUM PATCH This Month

MIT Kerberos 5 (aka krb5) before 1.12.2 allows remote attackers to cause a denial of service (buffer over-read and application crash) by injecting invalid tokens into a GSSAPI application session. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. Epss exploitation probability 14.5%.

CVE-2013-1417 Nov 20, 14:12 LOW POC PATCH Monitor

do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.11 before 1.11.4, when a single-component realm name is used, allows remote authenticated users to cause a denial of. Rated low severity (CVSS 3.5), this vulnerability is remotely exploitable. Public exploit code available.

CVE-2013-1418 Nov 18, 03:55 MEDIUM PATCH This Month

The setup_server_realm function in main.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.7, when multiple realms are configured, allows remote attackers to cause a. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.

CVE-2013-6800 Nov 18, 02:55 MEDIUM PATCH This Month

An unspecified third-party database module for the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.10.x allows remote authenticated users to cause a denial of service (NULL pointer. Rated medium severity (CVSS 4.0), this vulnerability is remotely exploitable, low attack complexity.

CVE-2013-1416 Apr 19, 11:44 MEDIUM PATCH This Month

The prep_reprocess_req function in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.5 does not properly perform service-principal realm referral, which. Rated medium severity (CVSS 4.0), this vulnerability is remotely exploitable, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.

CVE-2013-1415 Mar 05, 05:05 MEDIUM PATCH This Month

The pkinit_check_kdc_pkid function in plugins/preauth/pkinit/pkinit_crypto_openssl.c in the PKINIT implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.4 and. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.

CVE-2012-1016 Mar 05, 04:54 MEDIUM PATCH This Month

The pkinit_server_return_padata function in plugins/preauth/pkinit/pkinit_srv.c in the PKINIT implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.4 attempts. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.

CVE-2012-1015 Aug 06, 16:55 CRITICAL PATCH Act Now

The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and 1.10.x before 1.10.3 attempts to calculate a checksum. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable.

CVE-2012-1014 Aug 06, 16:55 CRITICAL PATCH Act Now

The process_as_req function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.10.x before 1.10.3 does not initialize a certain structure member, which allows remote attackers to. Rated critical severity (CVSS 9.0), this vulnerability is remotely exploitable, low attack complexity.

CVE-2012-1013 Jun 07, 19:55 MEDIUM POC PATCH This Month

The check_1_6_dummy function in lib/kadm5/srv/svr_principal.c in kadmind in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x, and 1.10.x before 1.10.2 allows remote authenticated administrators to cause a. Rated medium severity (CVSS 4.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

CVE-2012-1012 Jun 07, 19:55 MEDIUM This Month

server/server_stubs.c in the kadmin protocol implementation in MIT Kerberos 5 (aka krb5) 1.10 before 1.10.1 does not properly restrict access to (1) SET_STRING and (2) GET_STRINGS operations, which. Rated medium severity (CVSS 5.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.