medium
5.3
CWE
20 79
Advisory Published
Advisory Published
Updated

CVE-2023-45648: Apache Tomcat: Trailer header parsing too lenient

First published: Tue Oct 10 2023(Updated: )

Apache Tomcat is vulnerable to HTTP request smuggling, caused by improper parsing of HTTP trailer headers. By sending a specially crafted invalid trailer header, an attacker could exploit this vulnerability to poison the web cache, bypass web application firewall protection, and conduct XSS attacks.

Credit: security@apache.org security@apache.org security@apache.org

Affected SoftwareAffected VersionHow to fix
Apache Tomcat>=8.5.0<8.5.94
Apache Tomcat>=9.0.1<9.0.81
Apache Tomcat>=10.1.1<10.1.14
Apache Tomcat=9.0.0-milestone1
Apache Tomcat=9.0.0-milestone10
Apache Tomcat=9.0.0-milestone11
Apache Tomcat=9.0.0-milestone12
Apache Tomcat=9.0.0-milestone13
Apache Tomcat=9.0.0-milestone14
Apache Tomcat=9.0.0-milestone15
Apache Tomcat=9.0.0-milestone16
Apache Tomcat=9.0.0-milestone17
Apache Tomcat=9.0.0-milestone18
Apache Tomcat=9.0.0-milestone19
Apache Tomcat=9.0.0-milestone2
Apache Tomcat=9.0.0-milestone20
Apache Tomcat=9.0.0-milestone21
Apache Tomcat=9.0.0-milestone22
Apache Tomcat=9.0.0-milestone23
Apache Tomcat=9.0.0-milestone24
Apache Tomcat=9.0.0-milestone25
Apache Tomcat=9.0.0-milestone26
Apache Tomcat=9.0.0-milestone27
Apache Tomcat=9.0.0-milestone3
Apache Tomcat=9.0.0-milestone4
Apache Tomcat=9.0.0-milestone5
Apache Tomcat=9.0.0-milestone6
Apache Tomcat=9.0.0-milestone7
Apache Tomcat=9.0.0-milestone8
Apache Tomcat=9.0.0-milestone9
Apache Tomcat=10.1.0-milestone1
Apache Tomcat=10.1.0-milestone10
Apache Tomcat=10.1.0-milestone11
Apache Tomcat=10.1.0-milestone12
Apache Tomcat=10.1.0-milestone13
Apache Tomcat=10.1.0-milestone14
Apache Tomcat=10.1.0-milestone15
Apache Tomcat=10.1.0-milestone16
Apache Tomcat=10.1.0-milestone17
Apache Tomcat=10.1.0-milestone18
Apache Tomcat=10.1.0-milestone19
Apache Tomcat=10.1.0-milestone2
Apache Tomcat=10.1.0-milestone20
Apache Tomcat=10.1.0-milestone3
Apache Tomcat=10.1.0-milestone4
Apache Tomcat=10.1.0-milestone5
Apache Tomcat=10.1.0-milestone6
Apache Tomcat=10.1.0-milestone7
Apache Tomcat=10.1.0-milestone8
Apache Tomcat=10.1.0-milestone9
Apache Tomcat=11.0.0-milestone1
Apache Tomcat=11.0.0-milestone10
Apache Tomcat=11.0.0-milestone11
Apache Tomcat=11.0.0-milestone2
Apache Tomcat=11.0.0-milestone3
Apache Tomcat=11.0.0-milestone4
Apache Tomcat=11.0.0-milestone5
Apache Tomcat=11.0.0-milestone6
Apache Tomcat=11.0.0-milestone7
Apache Tomcat=11.0.0-milestone8
Apache Tomcat=11.0.0-milestone9
Debian Debian Linux=10.0
Debian Debian Linux=11.0
Debian Debian Linux=12.0
debian/tomcat10
10.1.6-1+deb12u1
10.1.16-1
debian/tomcat9<=9.0.31-1~deb10u6<=9.0.43-2~deb11u6
9.0.31-1~deb10u10
9.0.43-2~deb11u9
9.0.70-2
maven/org.apache.tomcat.embed:tomcat-embed-core>=8.5.0<8.5.94
8.5.94
maven/org.apache.tomcat.embed:tomcat-embed-core>=9.0.0-M1<9.0.81
9.0.81
maven/org.apache.tomcat.embed:tomcat-embed-core>=10.1.0-M1<10.1.14
10.1.14
maven/org.apache.tomcat.embed:tomcat-embed-core>=11.0.0-M1<11.0.0-M12
11.0.0-M12
maven/org.apache.tomcat:tomcat>=8.5.0<8.5.94
8.5.94
maven/org.apache.tomcat:tomcat>=9.0.0-M1<9.0.81
9.0.81
maven/org.apache.tomcat:tomcat>=10.1.0-M1<10.1.14
10.1.14
maven/org.apache.tomcat:tomcat>=11.0.0-M1<11.0.0-M12
11.0.0-M12
redhat/tomcat<11.0.0
11.0.0
redhat/tomcat<10.1.14
10.1.14
redhat/tomcat<9.0.81
9.0.81
redhat/tomcat<8.5.94
8.5.94
IBM IBM® Engineering Requirements Management DOORS<=9.7.2.7
IBM IBM® Engineering Requirements Management DOORS Web Access<=9.7.2.7

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2023-45648?

    CVE-2023-45648 is a vulnerability in Apache Tomcat that allows for improper input validation.

  • Which versions of Apache Tomcat are affected by CVE-2023-45648?

    Apache Tomcat versions 11.0.0-M1 through 11.0.0-M11, 10.1.0-M1 through 10.1.13, 9.0.0-M1 through 9.0.81, and 8.5.0 through 8.5.93 are affected by CVE-2023-45648.

  • How can a specially crafted trailer header exploit CVE-2023-45648?

    A specially crafted, invalid trailer header can exploit CVE-2023-45648 by causing Tomcat to incorrectly parse HTTP trailer headers.

  • What is the severity of CVE-2023-45648?

    The severity of CVE-2023-45648 is not specified.

  • How can I fix CVE-2023-45648?

    To fix CVE-2023-45648, update Apache Tomcat to versions 8.5.94, 9.0.81, 10.1.14, or 11.0.0-M12 depending on the affected version.

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