CVE-2019-9894

NameCVE-2019-9894
DescriptionA remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-1763-1, DSA-4423-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
putty (PTS)jessie, jessie (lts)0.63-10+deb8u2fixed
stretch (security), stretch (lts), stretch0.67-3+deb9u1fixed
buster (security), buster, buster (lts)0.74-1+deb11u1~deb10u2fixed
bullseye0.74-1+deb11u2fixed
bullseye (security)0.74-1+deb11u1fixed
bookworm0.78-2+deb12u2fixed
bookworm (security)0.78-2+deb12u1fixed
sid, trixie0.82-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
puttysourcejessie0.63-10+deb8u2DLA-1763-1
puttysourcestretch0.67-3+deb9u1DSA-4423-1
puttysource(unstable)0.70-6

Notes

https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-rsa-kex-integer-overflow.html
https://git.tartarus.org/?p=simon/putty.git;a=commitdiff;h=d82854999516046122501b2e145099740ed0284f

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