A heap-based buffer overflow exists in GNU Bash prior to 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().
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
gnu bash |
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redhat enterprise linux 7.0 |
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