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.
No PoCs from references.
- https://github.com/flyrev/security-scan-ci-presentation
- https://github.com/yfoelling/yair