CVE-2013-4122

Public Exploit

Description

Cyrus SASL 2.1.23, 2.1.26, and earlier does not properly handle when a NULL value is returned upon an error by the crypt function as implemented in glibc 2.17 and later, which allows remote attackers to cause a denial of service (thread crash and consumption) via (1) an invalid salt or, when FIPS-140 is enabled, a (2) DES or (3) MD5 encrypted password, which triggers a NULL pointer dereference.

Category

4.3
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 2.41% Top 20%
Vendor Advisory gentoo.org Vendor Advisory ubuntu.com Vendor Advisory debian.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://git.cyrusimap.org/cyrus-sasl/commit/?id=dedad73e5e7a75d01a5f3d5a6702ab8ccd2ff40d patch exploit
https://www.linuxquestions.org/questions/slackware-14/%5Bslackware-current%5D-glibc-2-17-shadow-and-other-penumbrae-4175461061/
http://security.gentoo.org/glsa/glsa-201309-01.xml vendor advisory
http://www.ubuntu.com/usn/USN-2755-1 vendor advisory
http://www.openwall.com/lists/oss-security/2013/07/15/1 mailing list
http://www.openwall.com/lists/oss-security/2013/07/13/1 mailing list
http://www.openwall.com/lists/oss-security/2013/07/12/6 mailing list
http://www.openwall.com/lists/oss-security/2013/07/12/3 mailing list
http://www.debian.org/security/2015/dsa-3368 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2013-4122?
CVE-2013-4122 has been scored as a medium severity vulnerability.
How to fix CVE-2013-4122?
To fix CVE-2013-4122, 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-2013-4122 being actively exploited in the wild?
It is possible that CVE-2013-4122 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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