CVE-2012-3405

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.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.67% Top 30%
Vendor Advisory redhat.com Vendor Advisory gentoo.org Vendor Advisory redhat.com Vendor Advisory ubuntu.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://rhn.redhat.com/errata/RHSA-2012-1200.html vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=833704
https://sourceware.org/bugzilla/show_bug.cgi?id=13446
https://security.gentoo.org/glsa/201503-04 vendor advisory
http://rhn.redhat.com/errata/RHSA-2012-1098.html vendor advisory
http://www.ubuntu.com/usn/USN-1589-1 vendor advisory
http://www.openwall.com/lists/oss-security/2012/07/11/17 mailing list

Frequently Asked Questions

What is the severity of CVE-2012-3405?
CVE-2012-3405 has been scored as a medium severity vulnerability.
How to fix CVE-2012-3405?
To fix CVE-2012-3405, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2012-3405 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2012-3405 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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