CVE-2023-42795

high-risk
Published 2023-10-10

Incomplete Cleanup vulnerability in Apache Tomcat.When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.

Do I need to act?

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0.69% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Debian Apache

References (7)

Mailing List https://lists.apache.org/thread/065jfyo583490r9j2v73nhpyxdob56lw
Mailing List http://www.openwall.com/lists/oss-security/2023/10/10/9
Mailing List https://lists.apache.org/thread/065jfyo583490r9j2v73nhpyxdob56lw
Mailing List https://lists.debian.org/debian-lts-announce/2023/10/msg00020.html
https://security.netapp.com/advisory/ntap-20231103-0007/
Third Party Advisory https://www.debian.org/security/2023/dsa-5521
Third Party Advisory https://www.debian.org/security/2023/dsa-5522
50
/ 100
high-risk
Severity 21/34 · High
Exploitability 2/34 · Minimal
Exposure 27/34 · High