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Debian dla-4620 : apache2 - security update

high Nessus Plugin ID 319620

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Synopsis

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

Description

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4620 advisory.

 - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4620-1 [email protected] https://www.debian.org/lts/security/ Bastien Roucaris June 07, 2026 https://wiki.debian.org/LTS
 - -------------------------------------------------------------------------

 Package : apache2 Version : 2.4.67-1~deb11u2 CVE ID : CVE-2026-49975 Debian Bug : 1138750

 It was discovered that incorrect cookie header accounting in the HTTP/2 implementation of the Apache HTTP server may result in denial of service (excessive resources consumption).

 For Debian 11 bullseye, this problem has been fixed in version 2.4.67-1~deb11u2.

 We recommend that you upgrade your apache2 packages.

 For the detailed security status of apache2 please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/apache2

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

Solution

Upgrade the apache2 packages.

See Also

https://packages.debian.org/source/bullseye/apache2

https://security-tracker.debian.org/tracker/source-package/apache2

https://security-tracker.debian.org/tracker/CVE-2026-49975

Plugin Details

Severity: High

ID: 319620

File Name: debian_DLA-4620.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/7/2026

Updated: 6/7/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, 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-2026-49975

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

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 7.7

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:apache2-data, p-cpe:/a:debian:debian_linux:apache2-suexec-custom, p-cpe:/a:debian:debian_linux:apache2-utils, p-cpe:/a:debian:debian_linux:libapache2-mod-md, p-cpe:/a:debian:debian_linux:apache2-suexec-pristine, p-cpe:/a:debian:debian_linux:apache2-bin, p-cpe:/a:debian:debian_linux:libapache2-mod-proxy-uwsgi, p-cpe:/a:debian:debian_linux:apache2-doc, p-cpe:/a:debian:debian_linux:apache2-dev, p-cpe:/a:debian:debian_linux:apache2-ssl-dev, p-cpe:/a:debian:debian_linux:apache2

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: 6/7/2026

Vulnerability Publication Date: 6/3/2026

Reference Information

CVE: CVE-2026-49975