VulnerabilityModified
CVE-2021-34548
An attacker can forge RELAY_END or RELAY_RESOLVED to bypass the intended access control for ending a stream.
HIGH 7.5EPSS 2.72%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.72%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.72% probability · 85th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-290
- Affected
- torproject/tor
- Source
- cve@mitre.org
References
- http://packetstormsecurity.com/files/163510/Tor-Half-Closed-Connection-Stream-Confusion.htmlThird Party Advisory, VDB Entry
- https://blog.torproject.org/node/2041Release Notes, Vendor Advisory
- https://gitlab.torproject.org/tpo/core/tor/-/issues/40389Broken Link
- https://security.gentoo.org/glsa/202107-25Third Party Advisory
- http://packetstormsecurity.com/files/163510/Tor-Half-Closed-Connection-Stream-Confusion.htmlThird Party Advisory, VDB Entry
- https://blog.torproject.org/node/2041Release Notes, Vendor Advisory
- https://gitlab.torproject.org/tpo/core/tor/-/issues/40389Broken Link
- https://security.gentoo.org/glsa/202107-25Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.