CVE-2017-12132 Other in n/a
The glibc DNS stub resolver simplifies off-path DNS spoofing attacks when EDNS is enabled, allowing attackers to bypass DNS security mechanisms.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-12132?
CVE-2017-12132 is a medium-severity vulnerability in Gnu Glibc, published on 1 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The DNS stub resolver in the GNU C Library (aka glibc or libc6) before version 2.26, when EDNS support is enabled, will solicit large UDP responses from name servers, potentially simplifying off-path DNS spoofing attacks due to IP fragmentation.
Weakness: CWE-770
Which versions are affected by CVE-2017-12132?
It affects 1 product.
Products include Gnu Glibc.
How do I fix CVE-2017-12132?
Upgrade to a fixed version.
Is CVE-2017-12132 being exploited?
There is no known exploitation of CVE-2017-12132 in the wild and no public exploit code.
Other vulnerabilities in Gnu Glibc
Sources
Also known as DEBIAN-CVE-2017-12132, GHSA-wjh5-4fq2-439w, UBUNTU-CVE-2017-12132.