Debian DSA-3796-1 : apache2 - security update

high Nessus Plugin ID 97400

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Synopsis

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

Description

Several vulnerabilities were discovered in the Apache2 HTTP server.

- CVE-2016-0736 RedTeam Pentesting GmbH discovered that mod_session_crypto was vulnerable to padding oracle attacks, which could allow an attacker to guess the session cookie.

- CVE-2016-2161 Maksim Malyutin discovered that malicious input to mod_auth_digest could cause the server to crash, causing a denial of service.

- CVE-2016-8743 David Dennerline, of IBM Security's X-Force Researchers, and Regis Leroy discovered problems in the way Apache handled a broad pattern of unusual whitespace patterns in HTTP requests. In some configurations, this could lead to response splitting or cache pollution vulnerabilities. To fix these issues, this update makes Apache httpd be more strict in what HTTP requests it accepts.

If this causes problems with non-conforming clients, some checks can be relaxed by adding the new directive 'HttpProtocolOptions unsafe' to the configuration.

This update also fixes the issue where mod_reqtimeout was not enabled by default on new installations.

Solution

Upgrade the apache2 packages.

For the stable distribution (jessie), these problems have been fixed in version 2.4.10-10+deb8u8.

Plugin Details

Severity: High

ID: 97400

File Name: debian_DSA-3796.nasl

Version: 3.14

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 2/27/2017

Updated: 1/11/2021

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: Medium

Base Score: 5

Temporal Score: 3.9

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

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:H/I:N/A:N

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:8.0, 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: 2/26/2017

Reference Information

CVE: CVE-2016-0736, CVE-2016-2161, CVE-2016-8743

DSA: 3796

Detections

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