CVE-2012-6711 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 fun...
HighCVSS 7.8
EPSS 0.53%
- Published
- Updated
- Exploit status
- No public exploit known
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().
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| debian/bash(Debian:12) | < 4.3-1 | 4.3-1 |
| debian/bash(Debian:13) | < 4.3-1 | 4.3-1 |
| debian/bash(Debian:14) | < 4.3-1 | 4.3-1 |
| GNU bash | >= 4.2, <= 4.3 | No fix listed |
| redhat enterprise linux | = 7.0 | No fix listed |
References
- Debian Security Tracker CVE-2012-6711 vendor-advisory
- bugzilla.redhat.com issue-tracking third-party-advisory
- git.savannah.gnu.org mailing-list patch third-party-advisory
- 108824 vdb-entry
- support.f5.com
- support.f5.com
- USN-4180-1 vendor-advisory