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Fencer Intel
critical 9.8

CVE-2017-5651 json

Expected Behavior Violation in Apache Tomcat

published 2017-04-17 9 y ago modified 2026-06-17 4 mo ago also GHSA-9hg2-395j-83rm , EUVD-2022-3384

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.8%
EPSS 7.8% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

In Apache Tomcat 9.0.0.M1 to 9.0.0.M18 and 8.5.0 to 8.5.12, the refactoring of the HTTP connectors introduced a regression in the send file processing. If the send file processing completed quickly, it was possible for the Processor to be added to the processor cache twice. This could result in the same Processor being used for multiple requests which in turn could lead to unexpected errors and/or response mix-up.

Patch / fix

  • maven org.apache.tomcat:tomcat-coyote 8.5.13, 9.0.0.M19
  • maven org.apache.tomcat.embed:tomcat-embed-core 8.5.13, 9.0.0.M19

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-5651 updated cvss 7.5

tomcat: Incorrect handling of send file processing could result into adding Processort to the cache twice

  • Red Hat Enterprise Linux 5 tomcat5 Red Hat Enterprise Linux 6 tomcat6, tomcat6-lib, tomcat6-log4j, tomcat6-javadoc, tomcat6-webapps, tomcat6-el-2.1-api, +4 more Red Hat Enterprise Linux 7 tomcat, tomcat-lib, tomcat-jsvc, tomcat-javadoc, tomcat-webapps, tomcat-el-2.2-api, +4 more Red Hat JBoss BRMS 5 jbossweb jbossweb Red Hat JBoss Data Grid 6 jbossweb jbossweb Red Hat JBoss Data Virtualization 6 jbossweb jbossweb
    +10 more products
    Red Hat JBoss Enterprise Application Platform 5 jbossweb jbossweb Red Hat JBoss Enterprise Application Platform 6 tomcat7 tomcat7 Red Hat JBoss Enterprise Web Server 2 tomcat6, tomcat6-lib, tomcat6-log4j, tomcat6-javadoc, tomcat6-webapps, tomcat7 tomcat7, +6 more Red Hat JBoss Fuse 6 karaf karaf, jbossweb jbossweb Red Hat JBoss Fuse Service Works 6 jbossweb jbossweb Red Hat JBoss Operations Network 3 jbossweb jbossweb Red Hat JBoss Portal 6 jbossweb jbossweb Red Hat JBoss SOA Platform 5 jbossweb jbossweb Red Hat JBoss Web Server 3 tomcat7 tomcat7, tomcat8 tomcat8 Red Hat Software Collections rh-java-common-tomcat-lib, rh-java-common-tomcat-javadoc, rh-java-common-tomcat-el-2.2-api, rh-java-common-tomcat-jsp-2.2-api, rh-java-common-tomcat-servlet-3.0-api
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

7.75% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.apache.tomcat:tomcat-coyote
>=9.0.0.M1, <9.0.0.M19
>=8.5.0, <8.5.13
9.0.0.M19
8.5.13
maven org.apache.tomcat.embed:tomcat-embed-core
>=9.0.0.M1, <9.0.0.M19
>=8.5.0, <8.5.13
9.0.0.M19
8.5.13

Affected products

  • Apache Software Foundation Apache Tomcat

Classification

Weakness
  • CWE-440 Expected Behavior Violation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.