Access Control Vulnerability in Tor Network Software
CVE-2021-34548

7.5HIGH

Key Information:

Vendor

Torproject

Status
Tor
Vendor
CVE Published:
29 June 2021

What is CVE-2021-34548?

A vulnerability in the Tor network software prior to version 0.4.6.5 allows attackers to manipulate RELAY_END or RELAY_RESOLVED messages. This manipulation can enable unauthorized access to the intended access control mechanisms designed to secure stream terminations. Exploitation of this flaw can potentially disrupt user privacy and security within the Tor network, leading to exposure of sensitive data.

References

https://gitlab.torproject.org/tpo/core/tor/-/issues/40389
x_refsource_MISC
https://blog.torproject.org/node/2041
x_refsource_CONFIRM
https://security.gentoo.org/glsa/202107-25
vendor-advisoryx_refsource_GENTOO

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.