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.

• CWE-770

• http://www.securityfocus.com/bid/100598
• https://access.redhat.com/errata/RHSA-2018:0805
• https://arxiv.org/pdf/1205.4011.pdfTechnical Description, Third Party Advisory
• https://sourceware.org/bugzilla/show_bug.cgi?id=21361Issue Tracking, Patch, Third Party Advisory
• http://www.securityfocus.com/bid/100598
• https://access.redhat.com/errata/RHSA-2018:0805
• https://arxiv.org/pdf/1205.4011.pdfTechnical Description, Third Party Advisory
• https://sourceware.org/bugzilla/show_bug.cgi?id=21361Issue Tracking, Patch, Third Party Advisory

Published

Aug 1, 2017

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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