Batch-Signature Verification Issue in Tor Browser by Tor Project
CVE-2021-38385

7.5HIGH

Key Information:

Vendor

Torproject

Status
Tor
Vendor
CVE Published:
30 August 2021

What is CVE-2021-38385?

A vulnerability in Tor Browser versions before 0.3.5.16, 0.4.5.10, and 0.4.6.7 arises from a flaw in the handling of batch-signature verification in conjunction with single-signature verification. This oversight can result in a remote assertion failure, affecting the overall security posture of the application. Affected users are encouraged to upgrade to the latest versions to mitigate potential risks.

References

https://blog.torproject.org
https://blog.torproject.org/node/2062
https://bugs.torproject.org/tpo/core/tor/40078

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

.