Debian dla-4859 : libcrypto3-udeb - security update

high Nessus Plugin ID 371990

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4859 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-4859-1 [email protected] https://www.debian.org/lts/security/ Arnaud Rebillout October 26, 2026 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : openssl Version : 3.0.22-1~deb12u2 CVE ID : CVE-2026-35189 CVE-2026-54872 CVE-2026-75805 CVE-2026-75806 CVE-2026-77696 CVE-2026-84782

Several vulnerabilities have been discovered in OpenSSL, a Secure Socket Layer toolkit providing the SSL and TLS cryptographic protocols for secure communication over the Internet.

CVE-2026-35189

A certificate with many nameRelativeToCRLIssuer CRL distribution points causes disproportionate heap growth when OpenSSL caches X.509 extensions.

CVE-2026-54872

The generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations with curves that do not have a dedicated implementation leaks information about the secret nonce through timing.

CVE-2026-75805

A CMP client that requests certificate revocation on the basis of a PKCS#10 CSR may dereference a NULL pointer and terminate abnormally when processing a crafted revocation response.

CVE-2026-75806

An established DTLS 1.2 association using an AEAD cipher suite can be terminated by a single unauthenticated datagram whose encrypted fragment is shorter than the mandatory explicit IV and authentication tag overhead.

CVE-2026-77696

SM2 signature generation uses non-constant-time arithmetic on secret values, forming a timing side-channel.

CVE-2026-84782

The DTLS retransmission logic does not correctly handle a handshake message write that is suspended part-way through. The retransmitted message can be read past the message buffer and the retransmission overwrites the internal state the suspended write needs to resume correctly.

For Debian 12 bookworm, these problems have been fixed in version 3.0.22-1~deb12u2.

We recommend that you upgrade your openssl packages.

For the detailed security status of openssl please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/openssl

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the libcrypto3-udeb packages.

Plugin Details

Severity: High

ID: 371990

File Name: debian_DLA-4859.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 10/26/2026

Updated: 10/26/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

Percentile: 96.38

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

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

CVSS Score Source: CVE-2026-84782

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:libcrypto3-udeb, p-cpe:/a:debian:debian_linux:libssl-dev, p-cpe:/a:debian:debian_linux:libssl-doc, p-cpe:/a:debian:debian_linux:libssl3-udeb, p-cpe:/a:debian:debian_linux:libssl3, p-cpe:/a:debian:debian_linux:openssl

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 10/26/2026

Vulnerability Publication Date: 9/29/2026

Reference Information

CVE: CVE-2026-35189, CVE-2026-54872, CVE-2026-75805, CVE-2026-75806, CVE-2026-77696, CVE-2026-84782

IAVA: 2026-A-1072

Detections

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