Debian DSA-3035-1 : bash - security update

critical Nessus Plugin ID 77882

Synopsis

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

Description

Tavis Ormandy discovered that the patch applied to fix CVE-2014-6271 released in DSA-3032-1 for bash, the GNU Bourne-Again Shell, was incomplete and could still allow some characters to be injected into another environment (CVE-2014-7169 ). With this update prefix and suffix for environment variable names which contain shell functions are added as hardening measure.

Additionally two out-of-bounds array accesses in the bash parser are fixed which were revealed in Red Hat's internal analysis for these issues and also independently reported by Todd Sabin.

Solution

Upgrade the bash packages.

For the stable distribution (wheezy), these problems have been fixed in version 4.2+dfsg-0.1+deb7u3.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=762760

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=762761

https://security-tracker.debian.org/tracker/CVE-2014-6271

https://security-tracker.debian.org/tracker/CVE-2014-7169

https://packages.debian.org/source/wheezy/bash

https://www.debian.org/security/2014/dsa-3035

Plugin Details

Severity: Critical

ID: 77882

File Name: debian_DSA-3035.nasl

Version: 1.22

Type: local

Agent: unix

Published: 9/26/2014

Updated: 1/31/2022

Supported Sensors: Frictionless Assessment Agent, Nessus Agent

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:bash, cpe:/o:debian:debian_linux:7.0

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: 9/25/2014

CISA Known Exploited Dates: 7/28/2022

Reference Information

CVE: CVE-2014-7169

BID: 70137

DSA: 3035