Debian DSA-4982-1 : apache2 - security update

critical Nessus Plugin ID 153970

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Synopsis

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

Description

The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-4982 advisory.

Several vulnerabilities have been found in the Apache HTTP server, which could result in denial of service. In addition a vulnerability was discovered in mod_proxy with which an attacker could trick the server to forward requests to arbitrary origin servers. For the oldstable distribution (buster), these problems have been fixed in version 2.4.38-3+deb10u6. For the stable distribution (bullseye), these problems have been fixed in version 2.4.51-1~deb11u1. 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

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 apache2 packages.

For the stable distribution (bullseye), these problems have been fixed in version 2.4.51-1~deb11u1.

Plugin Details

Severity: Critical

ID: 153970

File Name: debian_DSA-4982.nasl

Version: 1.8

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 10/10/2021

Updated: 1/24/2025

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

Risk Information

VPR

Risk Factor: High

Score: 8.1

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

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

CVSS Score Source: CVE-2021-39275

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

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

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

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, cpe:/o:debian:debian_linux:10.0, 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: 10/8/2021

Vulnerability Publication Date: 9/16/2021

CISA Known Exploited Vulnerability Due Dates: 12/15/2021

Reference Information

CVE: CVE-2021-34798, CVE-2021-36160, CVE-2021-39275, CVE-2021-40438

IAVA: 2021-A-0440-S

Detections

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