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Ubuntu: USN-4180-1 (CVE-2012-6711): Bash vulnerability

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Ubuntu: USN-4180-1 (CVE-2012-6711): Bash vulnerability

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
06/18/2019
Created
11/13/2019
Added
11/12/2019
Modified
03/22/2023

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().

Solution(s)

  • ubuntu-upgrade-bash

References

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