CVE-2012-6711
High
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().
SeverityHigh
CVSS7.0
Exploit probability—
Product
Gnu Bash
PublishedJun 18, 2019
First seenJun 18, 2019
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnu bash | 4.2 ≤ v ≤ 4.3 | — |
| redhat enterprise_linux | 7.0 | — |
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