CVE-2021-25329

Incomplete fix for CVE-2020-9484

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.

7.0
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 4.62% Top 15%
Vendor Advisory debian.org Vendor Advisory gentoo.org Vendor Advisory apache.org
Affected: Apache Software Foundation Apache Tomcat
Published at:
Updated at:

References

Link Tags
https://lists.apache.org/thread.html/rfe62fbf9d4c314f166fe8c668e50e5d9dd882a99447f26f0367474bf%40%3Cannounce.tomcat.apache.org%3E mailing list vendor advisory
https://lists.apache.org/thread.html/rfe62fbf9d4c314f166fe8c668e50e5d9dd882a99447f26f0367474bf%40%3Cdev.tomcat.apache.org%3E mailing list
https://lists.apache.org/thread.html/rfe62fbf9d4c314f166fe8c668e50e5d9dd882a99447f26f0367474bf%40%3Cannounce.apache.org%3E mailing list
https://lists.apache.org/thread.html/rfe62fbf9d4c314f166fe8c668e50e5d9dd882a99447f26f0367474bf%40%3Cusers.tomcat.apache.org%3E mailing list
https://lists.apache.org/thread.html/rf6d5d57b114678d8898005faef31e9fd6d7c981fcc4ccfc3bc272fc9%40%3Cdev.tomcat.apache.org%3E mailing list
http://www.openwall.com/lists/oss-security/2021/03/01/2 third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2021/03/msg00018.html third party advisory mailing list
https://www.debian.org/security/2021/dsa-4891 third party advisory vendor advisory
https://lists.apache.org/thread.html/r8a2ac0e476dbfc1e6440b09dcc782d444ad635d6da26f0284725a5dc%40%3Cusers.tomcat.apache.org%3E mailing list
https://lists.apache.org/thread.html/rb51ccd58b2152fc75125b2406fc93e04ca9d34e737263faa6ff0f41f%40%3Cusers.tomcat.apache.org%3E mailing list
https://lists.apache.org/thread.html/r732b2ca289dc02df2de820e8775559abd6c207f159e39f559547a085%40%3Cusers.tomcat.apache.org%3E mailing list
https://lists.apache.org/thread.html/r11ce01e8a4c7269b88f88212f21830edf73558997ac7744f37769b77%40%3Cusers.tomcat.apache.org%3E mailing list
https://www.oracle.com//security-alerts/cpujul2021.html third party advisory patch
https://security.netapp.com/advisory/ntap-20210409-0002/ third party advisory
https://www.oracle.com/security-alerts/cpuoct2021.html third party advisory patch
https://www.oracle.com/security-alerts/cpujan2022.html third party advisory patch
https://security.gentoo.org/glsa/202208-34 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-25329?
CVE-2021-25329 has been scored as a high severity vulnerability.
How to fix CVE-2021-25329?
To fix CVE-2021-25329, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-25329 being actively exploited in the wild?
It is possible that CVE-2021-25329 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~5% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-25329?
CVE-2021-25329 affects Apache Software Foundation Apache Tomcat.
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