Reachable Assertion in Tor - #VU83031

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Main Vulnerability Database Vulnerabilities #VU83031

Reachable Assertion in Tor - #VU83031

Published: November 13, 2023


Vulnerability identifier: #VU83031
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when recording a failed rendezvous circuit on the service side for the MetricsPort. A remote attacker can perform a denial of service attack of the onion service.


Affected software

Tor
Fedora
tor

Remediation

Install updates from vendor's website.

Tor - update to 0.4.8.9
tor - addressed in versions 0.4.8.9-1.el8, 0.4.8.9-1.el9, 0.4.8.9-1.fc37, 0.4.8.9-1.fc38, 0.4.8.9-1.fc39

External References

Related Security Bulletins