CVE-2020-8608

NameCVE-2020-8608
DescriptionIn libslirp 4.1.0, as used in QEMU 4.2.0, tcp_subr.c misuses snprintf return values, leading to a buffer overflow in later code.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2142-1, DLA-2144-1, DLA-2288-1, DSA-4733-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libslirp (PTS)bullseye, sid4.3.1-1fixed
qemu (PTS)stretch1:2.8+dfsg-6+deb9u9vulnerable
stretch (security)1:2.8+dfsg-6+deb9u10fixed
buster, buster (security)1:3.1+dfsg-8+deb10u7fixed
bullseye1:5.0-13fixed
sid1:5.0-14fixed
slirp (PTS)buster, stretch1:1.0.17-8vulnerable
bullseye, sid1:1.0.17-10vulnerable
slirp4netns (PTS)buster0.2.3-1vulnerable
bullseye, sid1.0.1-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libslirpsource(unstable)4.2.0-1
qemusourcejessie1:2.1+dfsg-12+deb8u14DLA-2144-1
qemusourcestretch1:2.8+dfsg-6+deb9u10DLA-2288-1
qemusourcebuster1:3.1+dfsg-8+deb10u7DSA-4733-1
qemusource(unstable)1:4.1-2
qemu-kvmsource(unstable)(unfixed)
slirpsourcejessie1:1.0.17-7+deb8u2DLA-2142-1
slirpsource(unstable)(unfixed)
slirp4netnssource(unstable)1.0.1-1

Notes

[buster] - slirp <ignored> (Minor issue, too intrusive to backport)
[buster] - slirp4netns <no-dsa> (Minor issue)
https://gitlab.freedesktop.org/slirp/libslirp/commit/68ccb8021a838066f0951d4b2817eb6b6f10a843
https://gitlab.freedesktop.org/slirp/libslirp/commit/30648c03b27fb8d9611b723184216cd3174b6775
qemu 1:4.1-2 switched to system libslirp, marking that version as fixed.
slirp4netns 1.0.1-1 switched to system libslirp, marking that version as fixed.

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