Debian DSA-3796-1 : apache2 - security update

Medium Nessus Plugin ID 97400

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.

See Also

https://security-tracker.debian.org/tracker/CVE-2016-0736

https://security-tracker.debian.org/tracker/CVE-2016-2161

https://security-tracker.debian.org/tracker/CVE-2016-8743

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

https://www.debian.org/security/2017/dsa-3796

Plugin Details

Severity: Medium

ID: 97400

File Name: debian_DSA-3796.nasl

Version: 3.12

Type: local

Agent: unix

Published: 2017/02/27

Updated: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

Temporal Score: 3.9

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

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3.0

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: p-cpe:/a:debian:debian_linux:apache2, cpe:/o:debian:debian_linux:8.0

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2017/02/26

Reference Information

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

DSA: 3796