CVE-2021-25329

NameCVE-2021-25329
DescriptionThe 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2594-1, DSA-4891-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
tomcat7 (PTS)stretch7.0.75-1vulnerable
tomcat8 (PTS)stretch8.5.54-0+deb9u1vulnerable
stretch (security)8.5.54-0+deb9u6fixed
tomcat9 (PTS)buster9.0.31-1~deb10u3vulnerable
buster (security)9.0.31-1~deb10u4fixed
bullseye, sid9.0.43-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
tomcat7source(unstable)(unfixed)
tomcat8sourcestretch8.5.54-0+deb9u6DLA-2594-1
tomcat8source(unstable)(unfixed)
tomcat9sourcebuster9.0.31-1~deb10u4DSA-4891-1
tomcat9source(unstable)9.0.43-1

Notes

[stretch] - tomcat7 <ignored> (No components in libservlet3.0-java binary package are affected)
https://www.openwall.com/lists/oss-security/2021/03/01/2
https://github.com/apache/tomcat/commit/4785433a226a20df6acbea49296e1ce7e23de453 (9.0.43)
https://github.com/apache/tomcat/commit/93f0cc403a9210d469afc2bd9cf03ab3251c6f35 (8.5.63)
https://github.com/apache/tomcat/commit/74b105657ffbd1d1de80455f03446c3bbf30d1f5 (7.0.108)
CVE is for incomplete fix for CVE-2020-9484.

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