CVE-2012-6711

Description

A heap-based buffer overflow exists in GNU Bash before 4.3 when wide characters, not supported by the current locale set in the LC_CTYPE environment variable, are printed through the echo built-in function. A local attacker, who can provide data to print through the "echo -e" built-in function, may use this flaw to crash a script or execute code with the privileges of the bash process. This occurs because ansicstr() in lib/sh/strtrans.c mishandles u32cconv().

How to fix CVE-2012-6711

To remediate CVE-2012-6711, upgrade the affected package to a fixed version below.

• —upgrade to 4.3-1 or later

Is CVE-2012-6711 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 4.3-1

CVSS scores

References (1)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2012-6711