CVE-2021-28090: Medium severity torproject Tor vulnerability

Published Mar 19, 2021
·
Updated

Tor before 0.4.5.7 allows a remote attacker to cause Tor directory authorities to exit with an assertion failure, aka TROVE-2021-002.

Affected Software

23 affected componentsFixes available
torproject Tor<0.3.5.14
torproject Tor>=0.4.4.4<0.4.4.8
torproject Tor>=0.4.5.0<0.4.5.7
torproject Tor=0.4.4.0-alpha
torproject Tor=0.4.4.1-alpha
torproject Tor=0.4.4.2-alpha
torproject Tor=0.4.4.3-alpha
Fedoraproject Fedora=33
alpine/tor>=0.4.4.4<0.3.5.14-r0
0.3.5.14-r0
alpine/tor>=0.4.4.4<0.4.4.9-r0
0.4.4.9-r0
alpine/tor>=0.4.4.4<0.4.4.9-r0
0.4.4.9-r0
alpine/tor>=0.4.4.4<0.4.4.8-r0
0.4.4.8-r0
alpine/tor>=0.4.4.4<0.4.5.7-r0
0.4.5.7-r0
alpine/tor>=0.4.4.4<0.4.5.7-r0
0.4.5.7-r0
alpine/tor>=0.4.4.4<0.4.5.7-r0
0.4.5.7-r0
alpine/tor>=0.4.4.4<0.4.5.7-r0
0.4.5.7-r0
alpine/tor>=0.4.4.4<0.4.5.7-r0
0.4.5.7-r0
alpine/tor>=0.4.4.4<0.4.5.7-r0
0.4.5.7-r0
alpine/tor>=0.4.4.4<0.4.5.7-r0
0.4.5.7-r0
alpine/tor>=0.4.4.4<0.4.5.7-r0
0.4.5.7-r0
alpine/tor>=0.4.4.4<0.4.5.7-r0
0.4.5.7-r0
alpine/tor>=0.4.4.4<0.4.5.7-r0
0.4.5.7-r0
alpine/tor>=0.4.4.4<0.4.5.7-r0
0.4.5.7-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 0.3.5.14-r0
  2. Upgrade

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

    Fixed in 0.4.4.9-r0
  3. Upgrade

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

    Fixed in 0.4.4.8-r0
  4. Upgrade

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

    Fixed in 0.4.5.7-r0

Event History

Mar 19, 2021
CVE Published
via MITRE·04:19 AM
Data Sourced
via MITRE·04:19 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-2021-28090?

CVE-2021-28090 is a vulnerability in Tor before 0.4.5.7 that allows a remote attacker to cause Tor directory authorities to exit with an assertion failure.

2

How does CVE-2021-28090 affect Tor?

CVE-2021-28090 affects Tor versions before 0.4.5.7.

3

What is the severity of CVE-2021-28090?

The severity of CVE-2021-28090 is medium with a CVSS score of 5.3.

4

How can I fix CVE-2021-28090?

To fix CVE-2021-28090, update Tor to version 0.4.5.7 or later.

5

Where can I find more information about CVE-2021-28090?

You can find more information about CVE-2021-28090 on the Tor Project blog, Tor Project bug tracker, and Tor Project GitLab.

Company

Resources

Contact

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