Vulnerability · Published Jun 29, 2021 · Assigned by mitre
CVE-2021-34548
High 7.5
In plain English
A high-severity security flaw in the tor package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.6% (higher than 85% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)2.6%top 14.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-003. An attacker can forge RELAY_END or RELAY_RESOLVED to bypass the intended access control for ending a stream.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | tor | 0.4.5.9-1 | DEBIAN-CVE-2021-34548 |
| Debian:13 | tor | 0.4.5.9-1 | DEBIAN-CVE-2021-34548 |
| Debian:14 | tor | 0.4.5.9-1 | DEBIAN-CVE-2021-34548 |
Affected products (as reported)
References
- https://gitlab.torproject.org/tpo/core/tor/-/issues/40389 x_refsource_MISC
- https://blog.torproject.org/node/2041 x_refsource_CONFIRM
- GLSA-202107-25 vendor-advisory, x_refsource_GENTOO
- http://packetstormsecurity.com/files/163510/Tor-Half-Closed-Connection-Stream-Confusion.html x_refsource_MISC