| Name | CVE-2019-9894 |
| Description | A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-1763-1, DSA-4423-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| putty (PTS) | jessie, jessie (lts) | 0.63-10+deb8u2 | fixed |
| stretch (security), stretch (lts), stretch | 0.67-3+deb9u1 | fixed |
| buster (security), buster, buster (lts) | 0.74-1+deb11u1~deb10u2 | fixed |
| bullseye | 0.74-1+deb11u2 | fixed |
| bullseye (security) | 0.74-1+deb11u1 | fixed |
| bookworm | 0.78-2+deb12u2 | fixed |
| bookworm (security) | 0.78-2+deb12u1 | fixed |
| sid, trixie | 0.81-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| putty | source | wheezy | (unfixed) | end-of-life | | |
| putty | source | jessie | 0.63-10+deb8u2 | | DLA-1763-1 | |
| putty | source | stretch | 0.67-3+deb9u1 | | DSA-4423-1 | |
| putty | source | (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