SB2019111128 - Ubuntu update for bash

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Main Vulnerability Database SB2019111128

SB2019111128 - Ubuntu update for bash

Published: November 11, 2019 Updated: October 30, 2026

Security Bulletin ID SB2019111128
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Heap-based buffer overflow (CVE-ID: CVE-2012-6711)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the ansicstr() function in lib/sh/strtrans.c 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 user can trigger a heap-based buffer overflow and escalate privileges on the system.


Remediation

Install update from vendor's website.

References