CVE-2014-9402: High severity gnu c library (glibc) vulnerability
It was reported [1] that getnetbyname function in glibc 2.21 in earlier will enter an infinite loop if the DNS backend is activated in the system Name Service Switch configuration, and the DNS resolver receives a positive answer while processing the network name.
Upstream commit that fixes this issue: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=11e3417af6e354f1942c68a271ae51e892b2814d
[1]: https://sourceware.org/bugzilla/showbug.cgi?id=17630
Other sources
The nssdns implementation of getnetbyname in GNU C Library (aka glibc) before 2.21, when the DNS backend in the Name Service Switch configuration is enabled, allows remote attackers to cause a denial of service (infinite loop) by sending a positive answer while a network name is being process.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2014-9402?
CVE-2014-9402 has a high severity rating due to its potential to cause a denial of service.
How do I fix CVE-2014-9402?
To mitigate CVE-2014-9402, upgrade to glibc version 2.21 or later.
Which versions of glibc are affected by CVE-2014-9402?
CVE-2014-9402 affects glibc versions prior to 2.21.
What systems are impacted by CVE-2014-9402?
Systems such as Ubuntu Linux 10.04, 12.04, 14.04, 14.10, and openSUSE 13.1 and 13.2 are impacted by CVE-2014-9402.
Can CVE-2014-9402 be exploited remotely?
Yes, CVE-2014-9402 can be exploited remotely by attackers through DNS responses.