CVE-2021-25329

Description

The fix for CVE-2020-9484 was incomplete. When using Apache Tomcat 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41, 8.5.0 to 8.5.61 or 7.0.0. to 7.0.107 with a configuration edge case that was highly unlikely to be used, the Tomcat instance was still vulnerable to CVE-2020-9494. Note that both the previously published prerequisites for CVE-2020-9484 and the previously published mitigations for CVE-2020-9484 also apply to this issue.

How to fix CVE-2021-25329

To remediate CVE-2021-25329, upgrade the affected package to a fixed version below.

• —upgrade to 7.0.108 or later
• —upgrade to 9.0.43-1 or later
• —upgrade to 10.0.2 or later

Is CVE-2021-25329 being exploited?

Low — EPSS is 0.8%, meaning exploitation activity has not been observed at scale.

Affected packages (3)

• >= 7.0.0, < 7.0.108, >= 8.5.0, < 8.5.62, >= 9.0.0, < 9.0.42, >= 10.0.0, < 10.0.1
• from 0, < 9.0.43-1
• >= 10.0.0-M1, < 10.0.2

CVSS scores

References (31)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-25329
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2021-25329
• PATCHgithub.com/apache/tomcat
• WEBgithub.com/apache/tomcat/commit/6d66e99ef85da93e4d2c2a536ca51aa3418bfaf4