Vulnerability Details : 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 category: Denial of service
Products affected by CVE-2020-15572
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
- cpe:2.3:a:torproject:tor:0.4.4.0:alpha:*:*:*:*:*:*
- cpe:2.3:a:torproject:tor:0.4.4.1:alpha:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-15572
0.32%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 70 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-15572
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:N/A:P |
8.6
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2020-15572
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-15572
-
https://blog.torproject.org/new-release-tor-03511-0428-0436-security-fixes
New releases: Tor 0.3.5.11, 0.4.2.8, and 0.4.3.6 (with security fixes) | Tor BlogRelease Notes;Vendor Advisory
-
https://gitlab.torproject.org/tpo/core/tor/-/issues/33119
Resolve TROVE-2020-001 (denial-of-service against Tor built with NSS) (#33119) · Issues · The Tor Project / Core / Tor · GitLabVendor Advisory
-
https://trac.torproject.org/projects/tor/wiki/TROVE
TROVE – Tor Bug Tracker & WikiVendor Advisory
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