Vulnerability in Torproject Tor
CVE-2021-38385
Tor before 0.3.5.16, 0.4.5.10, and 0.4.6.7 mishandles the relationship between batch-signature verification and single-signature verification, leading to a remote assertion failure, aka TROVE-2021-007.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.017 (76.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blog.torproject.org (Release Notes, Vendor Advisory)
- blog.torproject.org/node/2062 (Release Notes, Vendor Advisory)
- bugs.torproject.org/tpo/core/tor/40078 (Exploit, Issue Tracking, Vendor Advisory)
- security.gentoo.org/glsa/202305-11 (vendor-advisory)
Frequently asked questions
- What is CVE-2021-38385?
- CVE-2021-38385 is a high-severity vulnerability in Torproject Tor, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2021-08-30.
- How severe is CVE-2021-38385?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-38385 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.