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Debian dsa-6575 : libnginx-mod-http-geoip - security update

critical Nessus Plugin ID 370146

Synopsis

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

Description

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6575 advisory.

 - ------------------------------------------------------------------------- Debian Security Advisory DSA-6575-1 [email protected] https://www.debian.org/security/ Jan Moj October 21, 2026 https://www.debian.org/security/faq
 - -------------------------------------------------------------------------

 Package : nginx CVE ID : CVE-2026-15176 CVE-2026-93479 CVE-2026-95101 CVE-2026-97205 CVE-2026-97629

 Several vulnerabilities were discovered in nginx, a high performance web and reverse proxy server. Depending on the configuration, these could result in memory corruption, denial of service, injection of requests to backend servers, or bypass of client certificate authentication.

 CVE-2026-15176

 Mapping a rewritten request URI to a filesystem path in a location using the alias directive could cause a buffer overflow.

 CVE-2026-93479

 Evaluation of string expressions in the HTTP and stream modules could overwrite reserved buffer space, resulting in a buffer overflow.
 Affected operations include evaluation of variable document roots and access log paths.

 The affected code was introduced into the trixie package by an earlier security backport.

 CVE-2026-95101

 Incorrect handling of fragmented unknown HTTP/3 frames could cause their contents to be treated as request body data. When proxying requests, this could allow injection of requests into a backend server or bypass of request body size limits.

 CVE-2026-97205

 A counter tracking pending asynchronous operations could overflow, causing request memory to be freed while still in use. This use-after-free could result in memory corruption or denial of service.

 CVE-2026-97629

 Incomplete synchronisation of TLS session ticket keys between worker processes could leave a worker using uninitialised key material. This could allow forged TLS sessions and bypass of client certificate authentication.

 For the stable distribution (trixie), these problems have been fixed in version 1.26.3-3+deb13u10.

 We recommend that you upgrade your nginx packages.

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

 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 these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the libnginx-mod-http-geoip packages.

See Also

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

https://security-tracker.debian.org/tracker/CVE-2026-15176

https://security-tracker.debian.org/tracker/CVE-2026-93479

https://security-tracker.debian.org/tracker/CVE-2026-95101

https://security-tracker.debian.org/tracker/CVE-2026-97205

https://security-tracker.debian.org/tracker/CVE-2026-97629

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

Plugin Details

Severity: Critical

ID: 370146

File Name: debian_DSA-6575.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/21/2026

Updated: 10/21/2026

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: High

Score: 7.9

Percentile: 99.34

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-2026-97205

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

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 7.2

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:libnginx-mod-http-geoip, p-cpe:/a:debian:debian_linux:libnginx-mod-http-image-filter, p-cpe:/a:debian:debian_linux:libnginx-mod-http-perl, p-cpe:/a:debian:debian_linux:libnginx-mod-http-xslt-filter, p-cpe:/a:debian:debian_linux:libnginx-mod-mail, p-cpe:/a:debian:debian_linux:libnginx-mod-stream-geoip, p-cpe:/a:debian:debian_linux:libnginx-mod-stream, p-cpe:/a:debian:debian_linux:nginx-common, p-cpe:/a:debian:debian_linux:nginx-core, p-cpe:/a:debian:debian_linux:nginx-dev, p-cpe:/a:debian:debian_linux:nginx-doc, p-cpe:/a:debian:debian_linux:nginx-extras, p-cpe:/a:debian:debian_linux:nginx-full, p-cpe:/a:debian:debian_linux:nginx-light, p-cpe:/a:debian:debian_linux:nginx

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/21/2026

Vulnerability Publication Date: 10/14/2026

Reference Information

CVE: CVE-2026-15176, CVE-2026-93479, CVE-2026-95101, CVE-2026-97205, CVE-2026-97629