Linux Distros Unpatched Vulnerability : CVE-2025-69418

medium Nessus Plugin ID 296779

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- Issue summary: When using the low-level OCB API directly with AES-NI or other hardware-accelerated code paths, inputs whose length is not a multiple of 16 bytes can leave the final partial block unencrypted and unauthenticated. Impact summary: The trailing 1-15 bytes of a message may be exposed in cleartext on encryption and are not covered by the authentication tag, allowing an attacker to read or tamper with those bytes without detection. The low-level OCB encrypt and decrypt routines in the hardware-accelerated stream path process full 16-byte blocks but do not advance the input/output pointers. The subsequent tail-handling code then operates on the original base pointers, effectively reprocessing the beginning of the buffer while leaving the actual trailing bytes unprocessed. The authentication checksum also excludes the true tail bytes. However, typical OpenSSL consumers using EVP are not affected because the higher-level EVP and provider OCB implementations split inputs so that full blocks and trailing partial blocks are processed in separate calls, avoiding the problematic code path. Additionally, TLS does not use OCB ciphersuites. The vulnerability only affects applications that call the low-level CRYPTO_ocb128_encrypt() or CRYPTO_ocb128_decrypt() functions directly with non-block-aligned lengths in a single call on hardware- accelerated builds. For these reasons the issue was assessed as Low severity. The FIPS modules in 3.6, 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this issue, as OCB mode is not a FIPS- approved algorithm. OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue. OpenSSL 1.0.2 is not affected by this issue. (CVE-2025-69418)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: Medium

ID: 296779

File Name: unpatched_CVE_2025_69418.nasl

Version: 1.5

Type: local

Agent: unix

Family: Misc.

Published: 1/27/2026

Updated: 1/28/2026

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.0

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.8

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2025-69418

CVSS v3

Risk Factor: Medium

Base Score: 4

Temporal Score: 3.7

Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:openssl, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:redhat:enterprise_linux:mokutil, p-cpe:/a:redhat:enterprise_linux:openssl-devel, p-cpe:/a:centos:centos:edk2-tools-doc, p-cpe:/a:centos:centos:ovmf, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:mingw64-openssl, p-cpe:/a:redhat:enterprise_linux:edk2-tools, p-cpe:/a:redhat:enterprise_linux:shim-unsigned-x64, p-cpe:/a:centos:centos:compat-openssl10, p-cpe:/a:redhat:enterprise_linux:openssl-perl, p-cpe:/a:centos:centos:aavmf, p-cpe:/a:centos:centos:openssl-libs, p-cpe:/a:centos:centos:openssl-perl, p-cpe:/a:redhat:enterprise_linux:openssl-static, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:edk2-tools-doc, p-cpe:/a:redhat:enterprise_linux:aavmf, p-cpe:/a:centos:centos:shim-unsigned-x64, p-cpe:/a:centos:centos:openssl-static, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:edk2, p-cpe:/a:redhat:enterprise_linux:shim-ia32, p-cpe:/a:centos:centos:edk2-ovmf, p-cpe:/a:redhat:enterprise_linux:compat-openssl10, p-cpe:/a:redhat:enterprise_linux:compat-openssl11, p-cpe:/a:redhat:enterprise_linux:edk2, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:redhat:enterprise_linux:openssl-libs, p-cpe:/a:redhat:enterprise_linux:shim-x64, p-cpe:/a:centos:centos:shim-x64, p-cpe:/a:centos:centos:mokutil, p-cpe:/a:centos:centos:mingw64-openssl, p-cpe:/a:redhat:enterprise_linux:shim-unsigned-aarch64, p-cpe:/a:centos:centos:openssl-devel, p-cpe:/a:centos:centos:shim-ia32, p-cpe:/a:redhat:enterprise_linux:shim-aa64, p-cpe:/a:redhat:enterprise_linux:mingw32-openssl, p-cpe:/a:debian:debian_linux:openssl, cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:compat-openssl11, p-cpe:/a:centos:centos:shim-aa64, p-cpe:/a:centos:centos:edk2-tools, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:edk2-ovmf, p-cpe:/a:centos:centos:mingw32-openssl, p-cpe:/a:redhat:enterprise_linux:shim, p-cpe:/a:redhat:enterprise_linux:openssl, p-cpe:/a:centos:centos:shim-unsigned-aarch64, p-cpe:/a:redhat:enterprise_linux:ovmf, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:centos:centos:edk2-aarch64, p-cpe:/a:centos:centos:shim, p-cpe:/a:redhat:enterprise_linux:edk2-aarch64

Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Reference Information

CVE: CVE-2025-69418

Detections

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