CVE-2017-12132

5.9 mediumEPSS 2.0%

Medium (5.9) in gnu glibc. EPSS 2.0% chance of exploitation in the next 30 days.

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

CVSS 3.0

5.9 medium

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 2.0% chance of exploitation in the next 30 days; higher than 80% of CVEs (scores of 2026-10-31)
CWE: CWE-770
Published: 2017-08-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

gnu:glibc

References

http://www.securityfocus.com/bid/100598
https://access.redhat.com/errata/RHSA-2018:0805
https://arxiv.org/pdf/1205.4011.pdf
https://sourceware.org/bugzilla/show_bug.cgi?id=21361
http://www.securityfocus.com/bid/100598

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