| Name | CVE-2019-8955 |
| Description | In Tor before 0.3.3.12, 0.3.4.x before 0.3.4.11, 0.3.5.x before 0.3.5.8, and 0.4.x before 0.4.0.2-alpha, remote denial of service against Tor clients and relays can occur via memory exhaustion in the KIST cell scheduler. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| tor (PTS) | buster | 0.3.5.16-1 | fixed |
| buster (security) | 0.3.5.16-1+deb10u1 | fixed |
| bullseye, bullseye (security) | 0.4.5.16-1 | fixed |
| bookworm, bookworm (security) | 0.4.7.16-1 | fixed |
| trixie | 0.4.8.10-1 | fixed |
| sid | 0.4.8.11-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| tor | source | jessie | (not affected) | | | |
| tor | source | stretch | (not affected) | | | |
| tor | source | (unstable) | 0.3.5.8-1 | | | |
Notes
[stretch] - tor <not-affected> (Only affects 0.3.2.1 and later)
[jessie] - tor <not-affected> (Only affects 0.3.2.1 and later)
https://blog.torproject.org/new-releases-tor-0402-alpha-0358-03411-and-03312
https://trac.torproject.org/projects/tor/ticket/29168