What’s Vulnerable › Vulnerabilities

CVE-2017-12132

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-08-01 · updated 2026-06-17
• Weakness: CWE-770

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.

Affected products

• GNU C Library (glibc): through 2.25

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

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