Vulnerability Description
The vfprintf function in stdio-common/vfprintf.c in libc in GNU C Library (aka glibc) 2.14 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 (segmentation fault and crash) via a format string with a large number of format specifiers that triggers "desynchronization within the buffer size handling," a different vulnerability than CVE-2012-3404.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Glibc | 2.14 |
| Redhat | Enterprise Virtualization | 3.0 |
| Canonical | Ubuntu Linux | 8.04 |
| Redhat | Enterprise Linux | 6.0 |
Related Weaknesses (CWE)
References
- http://rhn.redhat.com/errata/RHSA-2012-1098.html
- http://rhn.redhat.com/errata/RHSA-2012-1200.html
- http://www.openwall.com/lists/oss-security/2012/07/11/17
- http://www.ubuntu.com/usn/USN-1589-1
- https://bugzilla.redhat.com/show_bug.cgi?id=833704
- https://security.gentoo.org/glsa/201503-04
- https://sourceware.org/bugzilla/show_bug.cgi?id=13446
- http://rhn.redhat.com/errata/RHSA-2012-1098.html
- http://rhn.redhat.com/errata/RHSA-2012-1200.html
- http://www.openwall.com/lists/oss-security/2012/07/11/17
- http://www.ubuntu.com/usn/USN-1589-1
- https://bugzilla.redhat.com/show_bug.cgi?id=833704
- https://security.gentoo.org/glsa/201503-04
- https://sourceware.org/bugzilla/show_bug.cgi?id=13446
FAQ
What is CVE-2012-3405?
CVE-2012-3405 is a vulnerability with a CVSS score of 5.0 (MEDIUM). The vfprintf function in stdio-common/vfprintf.c in libc in GNU C Library (aka glibc) 2.14 and other versions does not properly calculate a buffer length, which allows context-dependent attackers to b...
How severe is CVE-2012-3405?
CVE-2012-3405 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2012-3405?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Glibc, Redhat Enterprise Virtualization, Canonical Ubuntu Linux, Redhat Enterprise Linux.