Buffer Length Calculation Vulnerability in vfprintf Function in GNU C Library (glibc)

CVE-2012-3404 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:N/A:P

The vfprintf function in stdio-common/vfprintf.c in libc in GNU C Library (aka glibc) 2.12 and other versions does not properly calculate a buffer length, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (stack corruption and crash) via a format string that uses positional parameters and many format specifiers.

Learn more about our Web Application Penetration Testing UK.