| Name | CVE-2019-9895 |
| Description | In PuTTY versions before 0.71 on Unix, a remotely triggerable buffer overflow exists in any kind of server-to-client forwarding. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | 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 | vulnerable |
| 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 | stretch | 0.67-3+deb9u1 | | DSA-4423-1 | |
| putty | source | (unstable) | 0.70-6 | | | |
Notes
[jessie] - putty <ignored> (Too intrusive to backport, patch uses callback handling that is not yet available in Jessie)
https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-fd-set-overflow.html
https://git.tartarus.org/?p=simon/putty.git;a=commitdiff;h=5c926d9ea4a9e0a0a2384f06c7583648cdff3ed6