Vulnerability Details : CVE-2021-34550
An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-006. The v3 onion service descriptor parsing allows out-of-bounds memory access, and a client crash, via a crafted onion service descriptor
Vulnerability category: Overflow
Exploit prediction scoring system (EPSS) score for CVE-2021-34550
Probability of exploitation activity in the next 30 days: 0.30%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 69 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-34550
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
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-2021-34550
-
The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-34550
-
https://security.gentoo.org/glsa/202107-25
Tor: Multiple vulnerabilities (GLSA 202107-25) — Gentoo securityThird Party Advisory
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https://gitlab.torproject.org/tpo/core/tor/-/issues/40392
Not FoundBroken Link
-
https://blog.torproject.org/node/2041
New stable security releases: 0.3.5.15, 0.4.4.9, 0.4.5.9, 0.4.6.5 | Tor BlogRelease Notes;Vendor Advisory
Products affected by CVE-2021-34550
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*