Out-of-bounds Read in Torproject Tor
CVE-2020-15572
Tor before 0.4.3.6 has an out-of-bounds memory access that allows a remote denial-of-service (crash) attack against Tor instances built to use Mozilla Network Security Services (NSS), aka TROVE-2020-001.
Vulnerability class: Buffer Overflow
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: 0.014 (71.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Torproject Tor — versions 0.4.4.0, 0.4.4.1
Weakness classification (CWE)
References
- gitlab.torproject.org/tpo/core/tor/-/issues/33119 (Vendor Advisory)
- trac.torproject.org/projects/tor/wiki/TROVE (Vendor Advisory)
- blog.torproject.org/new-release-tor-03511-0428-0436-security-fixes (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-15572?
- CVE-2020-15572 is a high-severity vulnerability in Torproject Tor, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2020-07-15.
- How severe is CVE-2020-15572?
- High severity. CVSS v3 base score is 7.5 out of 10.