Vulnerability Details 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 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().
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 36.4%
CVSS Severity
CVSS v3 Score 7.0
CVSS v2 Score 4.6
References
- http://git.savannah.gnu.org/cgit/bash.git/commit/?h=devel&id=863d31ae775d56b785dc5b0105b6d251515d81d5
- http://www.securityfocus.com/bid/108824
- https://bugzilla.redhat.com/show_bug.cgi?id=1721071
- https://support.f5.com/csp/article/K05122252
- https://support.f5.com/csp/article/K05122252?utm_source=f5support&%3Butm_medium=RSS
- https://usn.ubuntu.com/4180-1/
- http://git.savannah.gnu.org/cgit/bash.git/commit/?h=devel&id=863d31ae775d56b785dc5b0105b6d251515d81d5
- http://www.securityfocus.com/bid/108824
- https://bugzilla.redhat.com/show_bug.cgi?id=1721071
- https://support.f5.com/csp/article/K05122252
- https://support.f5.com/csp/article/K05122252?utm_source=f5support&%3Butm_medium=RSS
- https://usn.ubuntu.com/4180-1/