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Debian dla-4624 : libcrypto1.1-udeb - security update

high Nessus Plugin ID 320023

Synopsis

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

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4624 advisory.

 - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4624-1 [email protected] https://www.debian.org/lts/security/ Arnaud Rebillout June 09, 2026 https://wiki.debian.org/LTS
 - -------------------------------------------------------------------------

 Package : openssl Version : 1.1.1w-0+deb11u7 CVE ID : CVE-2026-28387 CVE-2026-28388 CVE-2026-28389 CVE-2026-28390

 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-2026-28387

 An uncommon configuration of clients performing DANE TLSA-based server authentication, when paired with uncommon server DANE TLSA records, may result in a use-after-free and/or double-free on the client side.

 CVE-2026-28388

 When a delta CRL that contains a Delta CRL Indicator extension is processed a NULL pointer dereference might happen if the required CRL Number extension is missing.

 CVE-2026-28389

 During processing of a crafted CMS EnvelopedData message with KeyAgreeRecipientInfo a NULL pointer dereference can happen.

 CVE-2026-28390

 During processing of a crafted CMS EnvelopedData message with KeyTransportRecipientInfo a NULL pointer dereference can happen.

 For Debian 11 bullseye, these problems have been fixed in version 1.1.1w-0+deb11u7.

 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 libcrypto1.1-udeb packages.

See Also

https://security-tracker.debian.org/tracker/source-package/openssl

https://security-tracker.debian.org/tracker/CVE-2026-28387

https://security-tracker.debian.org/tracker/CVE-2026-28388

https://security-tracker.debian.org/tracker/CVE-2026-28389

https://security-tracker.debian.org/tracker/CVE-2026-28390

https://packages.debian.org/source/bullseye/openssl

Plugin Details

Severity: High

ID: 320023

File Name: debian_DLA-4624.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/9/2026

Updated: 6/9/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-28387

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libssl-doc, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:libssl1.1, p-cpe:/a:debian:debian_linux:openssl, p-cpe:/a:debian:debian_linux:libcrypto1.1-udeb, p-cpe:/a:debian:debian_linux:libssl-dev, p-cpe:/a:debian:debian_linux:libssl1.1-udeb

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/9/2026

Vulnerability Publication Date: 4/9/2024

Reference Information

CVE: CVE-2026-28387, CVE-2026-28388, CVE-2026-28389, CVE-2026-28390

IAVA: 2026-A-0308