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Debian dsa-6303 : libvarnishapi-dev - security update

high Nessus Plugin ID 307676

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 13 host has packages installed that are affected by a vulnerability as referenced in the dsa-6303 advisory.

 - ------------------------------------------------------------------------- Debian Security Advisory DSA-6303-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff May 27, 2026 https://www.debian.org/security/faq
 - -------------------------------------------------------------------------

 Package : varnish CVE ID : CVE-2025-8671

 Two security issues were discovered in the the Varnish web accelerator, which could result in cache poisoning or authentication bypass.

 For the stable distribution (trixie), this problem has been fixed in version 7.7.0-3+deb13u1.

 We recommend that you upgrade your varnish packages.

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

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

 Mailing list: [email protected]

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

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

Solution

Upgrade the libvarnishapi-dev packages.

See Also

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

https://packages.debian.org/source/trixie/varnish

https://security-tracker.debian.org/tracker/CVE-2025-8671

Plugin Details

Severity: High

ID: 307676

File Name: debian_DSA-6303.nasl

Version: 1.3

Type: Local

Agent: unix

Published: 4/21/2026

Updated: 5/28/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2025-8671

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:varnish, p-cpe:/a:debian:debian_linux:libvarnishapi-dev, p-cpe:/a:debian:debian_linux:varnish-doc, p-cpe:/a:debian:debian_linux:libvarnishapi3, cpe:/o:debian:debian_linux:13.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/8/2026

Vulnerability Publication Date: 3/24/2026

Reference Information

CVE: CVE-2025-8671

IAVA: 2026-A-0408