7.7 High
AI Score
Confidence
High
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.003 Low
EPSS
Percentile
70.4%
The vfprintf function in stdio-common/vfprintf.c in GNU C Library (aka glibc) 2.5, 2.12, and probably other versions does not “properly restrict the use of” the alloca function when allocating the SPECS array, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (crash) or possibly execute arbitrary code via a crafted format string using positional parameters and a large number of format specifiers, a different vulnerability than CVE-2012-3404 and CVE-2012-3405.
rhn.redhat.com/errata/RHSA-2012-1097.html
rhn.redhat.com/errata/RHSA-2012-1098.html
rhn.redhat.com/errata/RHSA-2012-1185.html
rhn.redhat.com/errata/RHSA-2012-1200.html
www.openwall.com/lists/oss-security/2012/07/11/17
www.ubuntu.com/usn/USN-1589-1
bugzilla.redhat.com/attachment.cgi?id=594722
bugzilla.redhat.com/show_bug.cgi?id=826943
security.gentoo.org/glsa/201503-04