| Name | CVE-2021-34549 |
| Description | An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-005. Hashing is mishandled for certain retrieval of circuit data. Consequently. an attacker can trigger the use of an attacker-chosen circuit ID to cause algorithm inefficiency. |
| 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-4932-1 |
| Debian Bugs | 990000 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| tor (PTS) | bullseye (security), bullseye | 0.4.5.16-1 | fixed |
| bookworm, bookworm (security) | 0.4.7.16-1 | fixed |
| sid, trixie | 0.4.8.13-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| tor | source | stretch | (unfixed) | end-of-life | | |
| tor | source | buster | 0.3.5.15-1 | | DSA-4932-1 | |
| tor | source | (unstable) | 0.4.5.9-1 | | | 990000 |
Notes
[stretch] - tor <end-of-life> (See DSA 4644)
https://blog.torproject.org/node/2041