CVE-2021-34549 — Uncontrolled Resource Consumption in TOR

CWE-400 — Uncontrolled Resource ConsumptionCWE-755 — Improper Handling of Exceptional Conditions6 documents6 sources
Severity
7.5HIGHNVD
EPSS
0.6%
top 29.26%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Torproject TOR
Timeline
PublishedJun 29
Latest updateOct 4

Description

An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-005. Hashing is mishandled for certain retrieval of circuit data. Consequently. an attacker can trigger the use of an attacker-chosen circuit ID to cause algorithm inefficiency.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶NVDtorproject/tor0.4.0.0 — 0.4.4.9+3
▶Debiantorproject/tor< 0.4.5.9-1+3

🔴Vulnerability Details

3
GHSA
GHSA-qx32-4xrf-2j53: An issue was discovered in Tor before 0↗2022-05-24
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OSV
CVE-2021-34549: An issue was discovered in Tor before 0↗2021-06-29
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CVEList
CVE-2021-34549: An issue was discovered in Tor before 0↗2021-06-29
▶

📋Vendor Advisories

2
Ubuntu
Tor vulnerabilities↗2022-10-04
▶
Debian
CVE-2021-34549: tor - An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-005. Hashing is mi...↗2021
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CVE-2021-34549 — Uncontrolled Resource Consumption | cvebase