CVE-2017-12132

Name: CVE-2017-12132
Creator: NVD / NIST
Published: 2017-08-01T16:29:00.18+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.90%

Last modified Jun 17, 2026

CVE-2017-12132 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.90% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.90%

77.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Gnu	Glibc	<= 2.25

References

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

Timeline

Published: Aug 1, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-12132?

How severe is CVE-2017-12132?

Severity scoring for CVE-2017-12132 is pending analysis. The EPSS model estimates a 1.90% probability of exploitation in the next 30 days.

How do I fix CVE-2017-12132?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-12132?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST