Vulnerability Details : CVE-2021-34548
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.
Products affected by CVE-2021-34548
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-34548
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 33 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-34548
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
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-2021-34548
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The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-34548
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http://packetstormsecurity.com/files/163510/Tor-Half-Closed-Connection-Stream-Confusion.html
Tor Half-Closed Connection Stream Confusion ≈ Packet StormThird Party Advisory;VDB Entry
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https://security.gentoo.org/glsa/202107-25
Tor: Multiple vulnerabilities (GLSA 202107-25) — Gentoo securityThird Party Advisory
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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
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https://gitlab.torproject.org/tpo/core/tor/-/issues/40389
Not FoundBroken Link
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