CVE-2021-38385: High severity torproject Tor vulnerability

Published Aug 30, 2021
·
Updated

Tor before 0.3.5.16, 0.4.5.10, and 0.4.6.7 mishandles the relationship between batch-signature verification and single-signature verification, leading to a remote assertion failure, aka TROVE-2021-007.

Affected Software

14 affected componentsFixes available
torproject Tor<0.3.5.16
torproject Tor>=0.4.0.0<0.4.5.10
torproject Tor>=0.4.6.0<0.4.6.7
alpine/tor>=0.4.0.0<0.4.5.10-r0
0.4.5.10-r0
alpine/tor>=0.4.0.0<0.4.6.7-r0
0.4.6.7-r0
alpine/tor>=0.4.0.0<0.4.6.7-r0
0.4.6.7-r0
alpine/tor>=0.4.0.0<0.4.6.7-r0
0.4.6.7-r0
alpine/tor>=0.4.0.0<0.4.6.7-r0
0.4.6.7-r0
alpine/tor>=0.4.0.0<0.4.6.7-r0
0.4.6.7-r0
alpine/tor>=0.4.0.0<0.4.6.7-r0
0.4.6.7-r0
alpine/tor>=0.4.0.0<0.4.6.7-r0
0.4.6.7-r0
alpine/tor>=0.4.0.0<0.4.6.7-r0
0.4.6.7-r0
alpine/tor>=0.4.0.0<0.4.6.7-r0
0.4.6.7-r0
alpine/tor>=0.4.0.0<0.4.6.7-r0
0.4.6.7-r0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade alpine/tor to a version that resolves this vulnerability.

    Fixed in 0.4.5.10-r0
  2. Upgrade

    Upgrade alpine/tor to a version that resolves this vulnerability.

    Fixed in 0.4.6.7-r0

Event History

Aug 30, 2021
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·05:15 AM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·05:15 AM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is CVE-2021-38385?

CVE-2021-38385 is a vulnerability in Tor versions before 0.3.5.16, 0.4.5.10, and 0.4.6.7 that mishandles batch-signature verification, leading to a remote assertion failure.

2

How severe is CVE-2021-38385?

CVE-2021-38385 has a severity score of 7.5 (high).

3

Which software versions are affected by CVE-2021-38385?

CVE-2021-38385 affects Tor versions before 0.3.5.16, 0.4.5.10, and 0.4.6.7.

4

What is the Common Weakness Enumeration (CWE) for CVE-2021-38385?

The CWE for CVE-2021-38385 is CWE-617.

5

Where can I find more information about CVE-2021-38385?

You can find more information about CVE-2021-38385 on the Tor Project's blog and bug tracker.

Company

Resources

Contact

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