Netatalk

TOCTOU race condition in Netatalk's ad_flush function across versions 3.0.0 through 4.4.2 exposes root-privileged file operations to remote manipulation, enabling limited data modification under constrained timing conditions. Unauthenticated network attackers (PR:N, AV:N per CVSS) must win a precise race window, making this high-complexity and low-impact - CVSS scores it 3.7 (Low) with integrity-only consequences and no confidentiality or availability impact. No public exploit code exists and the vulnerability is not confirmed actively exploited in CISA KEV at time of analysis.

Missing break statement in Netatalk's DSI OpenSession handler allows DSIOPT_ATTNQUANT case to fall through into DSIOPT_SERVQUANT processing, affecting versions 1.5.0 through 4.4.2. An unauthenticated remote attacker can send a crafted DSI session options packet to trigger unintended session option handling, resulting in minor service disruption. No public exploit identified at time of analysis, and the High attack complexity rating (AC:H) constrains real-world exploitation to adversaries capable of precise DSI packet construction.

Incorrect errno calculation in Netatalk 2.1.0 through 4.4.2 allows remote unauthenticated attackers to cause minor service disruption by triggering simultaneous error conditions that produce invalid composite error codes via bitwise OR misuse. The flaw (CWE-682, Incorrect Calculation) diverts execution into incorrect error-handling paths within the AFP file-sharing service, affecting availability at a low level (A:L) with no confidentiality or integrity impact. No public exploit or active exploitation has been identified at time of analysis; the CVSS score of 3.7 (Low) and high attack complexity (AC:H) reflect a limited real-world threat.

Netatalk versions 3.1.2 through 4.4.2 are distributed as binaries compiled without the FORTIFY_SOURCE flag, stripping away runtime buffer overflow detection that the compiler would otherwise embed into unsafe C standard library calls. Remote unauthenticated attackers can, under high-complexity conditions, trigger memory errors that the absent protection would have safely caught and terminated, instead manifesting as minor availability impact (CVSS A:L). No public exploit code exists and CISA has not added this to the KEV catalog; the CVSS score of 3.7 (Low) reflects the limited impact ceiling and high attack complexity.

Information disclosure in Netatalk 3.0.0 through 4.4.2 stems from a dead bounds check (CWE-561) in the Spotlight RPC unmarshaller - code intended to enforce input boundaries is logically unreachable, leaving RPC input processing without effective size validation. Remote attackers who hold at least low-level credentials can submit crafted Spotlight RPC requests to extract limited confidential information from the service. No public exploit has been identified at time of analysis, and the CVSS 3.1 score correctly reflects the constrained real-world impact: high attack complexity, authentication required, and confidentiality-only impact with no integrity or availability consequence.

Incorrect hexadecimal-to-integer conversion in Netatalk 2.0.0 through 4.4.2 stems from a macro that fails to handle uppercase hex digits (A-F) correctly, producing wrong integer values during AFP protocol processing. An authenticated remote attacker with low privileges can exploit the flaw under high-complexity conditions to cause minor integrity corruption - for example, corrupted filename or attribute encoding. No public exploit code exists and the vulnerability is not listed in CISA KEV, making real-world exploitation unlikely in most environments. Fixed in Netatalk 4.5.0.

Format string argument mismatch in Netatalk 3.0.3 through 4.4.2 allows authenticated network attackers to cause low-severity availability disruption, with a secondary reporter-assessed potential for memory content disclosure. The root cause is CWE-134 (Use of Externally-Controlled Format String), a class known to enable stack and heap memory leakage via injected format specifiers - a risk flagged by securin's 'Information Disclosure' tag that is not fully reflected in the CVSS vector (C:N). No public exploit identified at time of analysis; vendor-released patch is available in version 4.5.0.

Shell injection in Netatalk 3.1.0 through 4.4.2 allows a high-privileged local attacker to execute arbitrary OS commands by embedding shell metacharacters in a configured volume path value. The flaw (CWE-78) arises because volume path strings are passed to a shell interpreter without sanitization, meaning any actor with write access to Netatalk's volume configuration can achieve full command execution under the Netatalk process context. No public exploit code has been identified at time of analysis, and the vendor has released a fix in version 4.4.3.

Privilege retention in Netatalk 1.5.0 through 4.4.2 results from auth modules silently ignoring failures of the seteuid() system call, allowing an authenticated network attacker to operate with unintended elevated privileges. When seteuid() fails-due to resource exhaustion, OS limits, or specific system configurations-the process continues execution under its original (higher) UID rather than the intended reduced privilege level, exposing file system objects or operations the user should not access. No public exploit code has been identified at time of analysis, and the issue is not listed in CISA KEV, but the vendor has confirmed the flaw and released a fix in version 4.5.0.

OS command injection in Netatalk 2.2.1 through 4.4.2 arises from a code path that invokes system() after a failed chdir() call, classified under CWE-78. Exploitation requires local access with high privileges and high attack complexity, and yields only low-integrity and low-availability impact with no confidentiality exposure, reflected in the CVSS score of 2.5. No public exploit code and no CISA KEV listing have been identified at time of analysis; a vendor-released fix is available in version 4.5.0.

Unbounded realloc during charset conversion in Netatalk 2.0.0 through 4.4.2 allows an authenticated remote attacker to trigger excessive memory allocation, resulting in limited availability impact. The flaw is classified under CWE-770 (resource allocation without limits) and carries a low CVSS score of 3.1, reflecting constrained exploitability due to high attack complexity and required authentication. No public exploit code or active exploitation has been identified at time of analysis; a fix was released in version 4.5.0.

Integer underflow in Netatalk's volxlate function affects all releases from 3.0.0 through 4.4.2, an open-source AFP (Apple Filing Protocol) file server widely deployed on Linux/Unix systems serving macOS clients. Exploitation is constrained to local, highly-privileged attackers under high-complexity conditions, yielding only limited confidentiality, integrity, and availability impact (CVSS 3.4). No active exploitation is confirmed (not listed in CISA KEV), and no public exploit identified at time of analysis.

Path traversal via extended attribute (ea) handling in Netatalk 2.1.0 through 4.4.2 allows authenticated remote attackers to access or modify files outside intended directories on AFP file shares. The flaw stems from incomplete input sanitization on the ea code path and is resolved in 4.4.3. No public exploit identified at time of analysis, and the issue is not listed in CISA KEV.

Heap over-read in Netatalk's extended attribute (EA) header parser affects all releases from 2.1.0 through 4.4.2, allowing authenticated remote attackers to read beyond allocated heap boundaries under high-complexity conditions. The impact is limited to partial memory disclosure (C:L) and minor availability degradation (A:L) with no integrity impact, consistent with a read-only out-of-bounds primitive. No public exploit code exists and no active exploitation has been identified; vendor-released fix 4.5.0 is available.

Heap out-of-bounds read in Netatalk 3.1.0 through 4.4.2 allows authenticated remote attackers to disclose sensitive memory contents and potentially crash the daemon by sending malformed Spotlight RPC requests. The flaw stems from improper bounds checking during Spotlight RPC unmarshalling and is fixed in version 4.4.3. No public exploit identified at time of analysis, and there is no evidence of active exploitation in CISA KEV.

Off-by-two memory corruption in Netatalk's papd daemon affects all versions from 2.0.0 through 4.4.2, fixed in 4.5.0. The flaw resides in the lp_write() function of the Printer Access Protocol daemon, where an off-by-two boundary error can produce minor integrity and availability impact when triggered by an adjacent-network attacker. With a CVSS score of 3.7 and no public exploit or CISA KEV listing identified at time of analysis, this is a low-severity issue requiring both local network adjacency and high attack complexity, significantly limiting real-world exploitability.

Out-of-bounds read in Netatalk versions 1.3 through 4.4.2 allows adjacent network attackers to trigger denial of service and potentially disclose memory contents via malformed ASP (AppleTalk Session Protocol) session IDs. The flaw, classified as CWE-125, was fixed in version 4.4.3, and no public exploit identified at time of analysis. CVSS 7.1 reflects an adjacent-network attack vector with no privileges required and a high availability impact.

LDAP filter injection in Netatalk 2.1.0 through 4.4.2 enables an authenticated remote attacker to manipulate LDAP query logic, potentially reading or modifying directory entries beyond their authorization scope. The CVSS score of 4.2 (Medium) reflects real but bounded impact - high attack complexity and a requirement for low-privilege authentication constrain opportunistic exploitation. No public exploit code has been identified at time of analysis, and this CVE is not listed in the CISA KEV catalog.

Out-of-bounds write in Netatalk versions 2.0.4 through 4.4.2 stems from a missing o_len bounds check in the pull_charset_flags() character-set conversion routine, enabling remote attackers with low privileges to corrupt memory and potentially compromise confidentiality, integrity, and availability of the AFP file server. The flaw is addressed in Netatalk 4.4.3, and no public exploit has been identified at time of analysis.

Timing side-channel exposure in Netatalk's DES-ECB authentication allows a remote unauthenticated attacker to conduct a cryptographic timing oracle attack against the AFP server, potentially recovering authentication secrets or credentials through statistical analysis of server response latency. Affected versions span 1.5.0 through 4.4.2 - a broad range covering multiple major releases - and the issue is rooted in non-constant-time operations during DES-ECB auth processing (CWE-208). No public exploit has been identified at time of analysis, and this CVE is not listed in the CISA KEV catalog; Netatalk 4.5.0 resolves the issue per the vendor advisory.

Denial of service in Netatalk versions 1.5.0 through 4.4.2 allows remote unauthenticated attackers to crash the AFP (Apple Filing Protocol) service by exploiting an integer underflow in the dsi_writeinit() function. The flaw is network-reachable with low complexity (CVSS 7.5, AV:N/AC:L/PR:N) and no public exploit identified at time of analysis, though the trivial trigger conditions make exploitation straightforward once a proof-of-concept emerges. Netatalk has resolved the issue in version 4.4.3.

Race condition in Netatalk's privilege toggle mechanism exposes AFP file server hosts to local privilege abuse across versions 2.2.5 through 4.4.2. The non-reentrant privilege toggle function can be exploited by a low-privileged local user who wins a narrow timing window to read, modify, or disrupt data at a transiently elevated privilege level. No public exploit code exists and the issue is not listed in CISA KEV; real-world risk is constrained by the requirement for local access and high attack complexity. Vendor-released patch is available in version 4.5.0.

Authentication bypass in Netatalk 2.2.2 through 4.4.2 allows attackers with high-privileged admin auth user credentials to circumvent authentication controls in this open-source AFP (Apple Filing Protocol) server implementation. The flaw, tracked as EUVD-2026-31234 and tagged as an Authentication Bypass weakness, carries a CVSS 7.2 (High) score and is fixed in version 4.5.0; no public exploit identified at time of analysis.

Stack buffer overflow in Netatalk's desktop.c affects all versions from 1.3 through 4.2.2, allowing a network-reachable low-privilege authenticated attacker to crash the AFP service or potentially execute arbitrary code on the server. The vulnerability is rooted in improper bounds checking within AFP desktop database handling code and carries a CVSS score of 6.0 (Medium) with high availability impact as the most reliably achievable outcome. No public exploit code and no CISA KEV listing have been identified at time of analysis, and the required high attack complexity materially limits real-world exploitation risk.

Shell injection in Netatalk 3.1.4 through 4.4.2 allows authenticated remote attackers to execute arbitrary OS commands through a bitwise-OR logic flaw, achieving full confidentiality, integrity, and availability impact (CVSS 7.5). Netatalk is the open-source AFP (Apple Filing Protocol) server commonly deployed on Linux/BSD NAS appliances to share files with macOS clients. The flaw was fixed in version 4.4.3; no public exploit identified at time of analysis and the issue is not currently in CISA KEV.

Predictable afpd session token generation in Netatalk 2.0.0 through 4.4.2 allows an authenticated remote attacker to forecast or brute-force valid session identifiers within the Apple Filing Protocol daemon. Per CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, the scored impact is limited to high availability disruption, though the reporter tag 'Information Disclosure' suggests potential session-hijacking consequences that may not be fully captured in the CVSS scoring - a discrepancy analysts should verify against the vendor advisory. No public exploit code or CISA KEV listing exists at time of analysis.

Weak cryptography in the dhcast128 user authentication module (UAM) of Netatalk versions 1.5.0 through 4.2.2 allows remote attackers to compromise confidentiality and integrity of AFP authentication exchanges. The flaw was reported by Securin and tagged as an information disclosure issue; no public exploit identified at time of analysis. The CVSS 7.4 score with High attack complexity reflects that exploitation requires conditions beyond a simple network request, yet the impact on credential material and session integrity is significant.

Information disclosure in Netatalk 2.1.0 through 4.4.2 exposes LDAP simple-bind passwords in log files, allowing any actor with read access to the affected logs to recover plaintext directory service credentials. The flaw is fixed in version 4.4.3, and no public exploit identified at time of analysis, though the CVSS 7.5 score reflects the high confidentiality impact of leaked bind credentials.

Arbitrary file read in Netatalk 3.0.2 through 4.4.2 allows authenticated remote attackers to create attacker-controlled symbolic links that the AFP server follows, exposing sensitive files outside the intended share. The flaw is fixed in version 4.4.3 and no public exploit identified at time of analysis. Securin reported the issue and the vendor has published an advisory at netatalk.io.

Heap buffer overflow in the Netatalk cnid_metad daemon's comm_rcv() function allows remote attackers with low-level privileges to corrupt memory across versions 2.0.0 through 4.4.2. Given the CVSS 9.9 score with scope change and high impact across confidentiality, integrity, and availability, successful exploitation likely leads to code execution in the daemon's context. No public exploit identified at time of analysis, and the issue is not listed in CISA KEV.

Out-of-bounds write in Netatalk versions 2.0.4 through 4.4.2 affects the convert_charset() routine during null termination handling, exposing the AppleTalk/AFP server implementation to memory corruption. Authenticated remote attackers can trigger heap or stack corruption that threatens confidentiality, integrity, and availability of the host. No public exploit identified at time of analysis, and the vendor has shipped a corrective release in 4.4.3.

Stack-based buffer overflow in Netatalk versions 2.0.4 through 4.4.2 allows authenticated remote attackers to corrupt memory via UCS-2 type confusion in the convert_charset() function, leading to high-impact compromise of confidentiality, integrity, and availability. The flaw affects Netatalk, the open-source AppleTalk/AFP file server commonly used to share files with macOS clients, and is fixed in version 4.4.3. No public exploit identified at time of analysis, though the high CVSS of 8.8 and low attack complexity warrant prompt patching.

SQL injection in Netatalk 3.1.0 through 4.4.2 allows authenticated remote attackers to compromise the MySQL-backed CNID (Catalog Node ID) database used to track AppleTalk/AFP file metadata. The high CVSS 8.8 score (CVSS:3.1/AV:N/AC:L/PR:L/UI:N) reflects network-reachable exploitation with low privileges and high impact to confidentiality, integrity, and availability; no public exploit identified at time of analysis.

A Type Confusion vulnerability was found in the Spotlight RPC functions in afpd in Netatalk 3.1.x before 3.1.17. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Access of Resource Using Incompatible Type (Type Confusion) vulnerability could allow attackers to execute arbitrary code by exploiting type confusion in the application.

Netatalk through 3.1.13 has an afp_getappl heap-based buffer overflow resulting in code execution via a crafted .appl file. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

The combination of primitives offered by SMB and AFP in their default configuration allows the arbitrary writing of files. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Synology DiskStation Manager. Rated high severity (CVSS 8.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Netatalk before 3.1.12 is vulnerable to an out of bounds write in dsi_opensess.c. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.