CVE catalog
CVE-2021-34550
tor: CVE-2021-34550
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.56% · Oct 25, 2026
An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-006. The v3 onion service descriptor parsing allows out-of-bounds memory access, and a client crash, via a crafted onion service descriptor
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | tor | sid | 0.4.9.14-1 | fixed |
| Debian | tor | forky | 0.4.9.14-1 | fixed |
| Debian | tor | trixie | 0.4.9.11-0+deb13u1 | fixed |
| Debian | tor | trixie-security | 0.4.9.14-0+deb13u1 | fixed |
| Debian | tor | bookworm | 0.4.9.11-0+deb12u1 | fixed |
| Debian | tor | bookworm-security | 0.4.9.11-0+deb12u1 | fixed |
| Ubuntu | tor | pro | 0.4.1.5-1 | vulnerable |
| Ubuntu | tor | pro | 0.4.1.5-1build1 | vulnerable |
| Ubuntu | tor | pro | 0.4.1.6-1 | vulnerable |
| Ubuntu | tor | pro | 0.4.2.5-1 | vulnerable |
| Ubuntu | tor | pro | 0.4.2.6-1 | vulnerable |
| Ubuntu | tor | pro | 0.4.2.7-1 | vulnerable |
| Ubuntu | tor | pro | 0.4.2.7-1ubuntu0.1~esm1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | tor | source | sid | 0.4.5.9-1 | not yet assigned | Not reported | [990000] |
| Debian | tor | source | forky | 0.4.5.9-1 | not yet assigned | Not reported | [990000] |
| Debian | tor | source | trixie | 0.4.5.9-1 | not yet assigned | Not reported | [990000] |
| Debian | tor | source | bookworm | 0.4.5.9-1 | not yet assigned | Not reported | [990000] |
| Ubuntu | tor | deb | pro | 0.4.2.7-1ubuntu0.1~esm1 | Not reported | UBUNTU-CVE-2021-34550 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [tor]Unknown
Details (6)
0.4.9.11-0+deb12u1· amd64 · bookwormFixed · Fixed:
0.4.5.9-1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.9.11-0+deb12u1· arm64 · bookwormFixed · Fixed:
0.4.5.9-1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.8.14-1~bpo12+1· amd64 · bookworm-backportsFixed · Fixed:
0.4.5.9-1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.8.14-1~bpo12+1· arm64 · bookworm-backportsFixed · Fixed:
0.4.5.9-1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.9.11-0+deb12u1· amd64 · bookworm-securityFixed · Fixed:
0.4.5.9-1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.9.11-0+deb12u1· arm64 · bookworm-securityFixed · Fixed:
0.4.5.9-1dsa · tor · debian · bookworm; dsa · tor · debian · 12
- [tor-geoipdb]Unknown
Source package: [tor]
Details (6)
0.4.9.11-0+deb12u1· all · bookwormFixed · Fixed:
0.4.5.9-1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.9.11-0+deb12u1· all · bookwormFixed · Fixed:
0.4.5.9-1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.8.14-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
0.4.5.9-1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.8.14-1~bpo12+1· all · bookworm-backportsFixed · Fixed:
0.4.5.9-1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.9.11-0+deb12u1· all · bookworm-securityFixed · Fixed:
0.4.5.9-1dsa · tor · debian · bookworm; dsa · tor · debian · 12
0.4.9.11-0+deb12u1· all · bookworm-securityFixed · Fixed:
0.4.5.9-1dsa · tor · debian · bookworm; dsa · tor · debian · 12
[Debian 13 (Trixie)]
- [tor]Unknown
Details (10)
0.4.9.11-0+deb13u1· amd64 · trixieFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.11-0+deb13u1· arm64 · trixieFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.11-1~bpo13+1· amd64 · trixie-backportsFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.11-1~bpo13+1· arm64 · trixie-backportsFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.11-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.11-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.12-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.12-0+deb13u2· amd64 · trixie-security · Historical versionFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.13-0+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.14-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
- [tor-geoipdb]Unknown
Source package: [tor]
Details (10)
0.4.9.11-0+deb13u1· all · trixieFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.11-0+deb13u1· all · trixieFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.11-1~bpo13+1· all · trixie-backportsFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.11-1~bpo13+1· all · trixie-backportsFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.11-0+deb13u1· all · trixie-securityFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.11-0+deb13u1· all · trixie-security · Historical versionFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.12-0+deb13u1· all · trixie-security · Historical versionFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.12-0+deb13u2· all · trixie-security · Historical versionFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.13-0+deb13u1· all · trixie-security · Historical versionFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
0.4.9.14-0+deb13u1· all · trixie-securityFixed · Fixed:
0.4.5.9-1dsa · tor · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2021_0926-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-34550]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-34550]
- [https://security-tracker.debian.org/tracker/CVE-2021-34550]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]