CVE-2017-12132

NameCVE-2017-12132
DescriptionThe 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium (attack range: remote)
Debian Bugs870650

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
eglibc (PTS)wheezy2.13-38+deb7u10vulnerable
wheezy (security)2.13-38+deb7u12vulnerable
glibc (PTS)jessie (security), jessie2.19-18+deb8u10vulnerable
stretch (security), stretch2.24-11+deb9u1vulnerable
buster2.25-3fixed
sid2.25-4fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
eglibcsource(unstable)(unfixed)medium
glibcsource(unstable)2.25-1medium870650
glibcsourceexperimental2.25-0experimental1medium

Notes

[stretch] - glibc <no-dsa> (Minor issue)
[jessie] - glibc <no-dsa> (Minor issue)
[wheezy] - eglibc <no-dsa> (Minor issue)
https://sourceware.org/bugzilla/show_bug.cgi?id=21361
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e14a27723cc3a154d67f3f26e719d08c0ba9ad25
https://arxiv.org/pdf/1205.4011.pdf

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