CVE-2021-20201

NameCVE-2021-20201
DescriptionA flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.
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)
NVD severitymedium
Debian Bugs983698

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
spice (PTS)stretch0.12.8-2.1+deb9u3vulnerable
stretch (security)0.12.8-2.1+deb9u4vulnerable
buster, buster (security)0.14.0-1.3+deb10u1vulnerable
bullseye, sid0.14.3-2.1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
spicesource(unstable)0.14.3-2.1983698

Notes

[buster] - spice <no-dsa> (Minor issue)
[stretch] - spice <no-dsa> (Minor issue)
https://gitlab.freedesktop.org/spice/spice/-/issues/49
https://gitlab.freedesktop.org/spice/spice/-/commit/ca5bbc5692e052159bce1a75f55dc60b36078749
https://gitlab.freedesktop.org/spice/spice/-/commit/95a0cfac8a1c8eff50f05e65df945da3bb501fc9
https://blog.qualys.com/product-tech/2011/10/31/tls-renegotiation-and-denial-of-service-attacks

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