CVE-2023-45648

high-risk
Published 2023-10-10

Improper Input Validation vulnerability in Apache Tomcat.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 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially crafted, invalid trailer header could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a reverse proxy. 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 fix the issue.

Do I need to act?

!
59.5% chance of exploitation in next 30 days
EPSS score — higher than 41% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
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)

Vendor Advisory https://lists.apache.org/thread/2pv8yz1pyp088tsxfb7ogltk9msk0jdp
Mailing List http://www.openwall.com/lists/oss-security/2023/10/10/10
Vendor Advisory https://lists.apache.org/thread/2pv8yz1pyp088tsxfb7ogltk9msk0jdp
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
66
/ 100
high-risk
Severity 21/34 · High
Exploitability 18/34 · Moderate
Exposure 27/34 · High