Servers and applications
CVE-2017-12132
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.
- Severity
- Medium 5.9
- Published
- 1 Aug 2017
- Last changed
- 17 Jun 2026
- Added to UpHeron
- 1 Nov 2026
- Exploit chance
- 2% in the next 30 daysHigher than 80% of CVEs. EPSS by FIRST, 11 Nov 2026
- Attack
- Over the network · Only under certain conditions · No login needed · No user action needed
- Attacker can
- Change data
- CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N- Sources
- NVD
Affected software
| Software | Affected versions |
|---|---|
GNU C LibraryServers and applications · cpe:a:gnu:glibc |
|