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Fencer Intel
medium 5.9

CVE-2017-15698 json

When parsing the AIA-Extension field of a client certificate, Apache Tomcat Native Connector 1.2.0 to 1.2.14 and 1.1.23 to 1.1.34 did not c…

published 2018-01-31 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-7135

cvss
5.9
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.5%
EPSS 3.5% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

When parsing the AIA-Extension field of a client certificate, Apache Tomcat Native Connector 1.2.0 to 1.2.14 and 1.1.23 to 1.1.34 did not correctly handle fields longer than 127 bytes. The result of the parsing error was to skip the OCSP check. It was therefore possible for client certificates that should have been rejected (if the OCSP check had been made) to be accepted. Users not using OCSP checks are not affected by this vulnerability.

Patch / fix

  • tomcat-native Debian 14, Debian 13, Debian 12 1.2.16-1

debian advisories DEBIAN-CVE-2017-15698

  • tomcat7 jboss enterprise web server 3.1 7.0.70-25.ep7.el6
  • tomcat7 jboss enterprise web server 3.1 7.0.70-25.ep7.el7
  • tomcat8 jboss enterprise web server 3.1 8.0.36-29.ep7.el6
  • tomcat8 jboss enterprise web server 3.1 8.0.36-29.ep7.el7
  • mod_cluster jboss enterprise web server 3.1 1.3.8-2.Final_redhat_2.1.ep7.el6
  • mod_cluster jboss enterprise web server 3.1 1.3.8-2.Final_redhat_2.1.ep7.el7
  • tomcat7-lib jboss enterprise web server 3.1 7.0.70-25.ep7.el6
  • tomcat7-lib jboss enterprise web server 3.1 7.0.70-25.ep7.el7

red hat advisories RHSA-2018:0466

  • libtcnative-1-0 SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 1.3.4-12.5.5.2

suse advisories SUSE-SU-2019:14014-1

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-2017-15698 updated cvss 5.4

tomcat-native: Mishandling of client certificates can allow for OCSP check bypass

  • Red Hat JBoss Enterprise Application Platform 6 tomcat-native tomcat-native Red Hat JBoss Enterprise Web Server 2 tomcat-native tomcat-native
    affected: no fix planned “Will not fix”
  • Red Hat JBoss Web Server 3.1
    fixed: vendor fix RHSA-2018:0465
  • Red Hat JBoss Web Server 3.1 for RHEL 6 tomcat7 7.0.70-25.ep7.el6, tomcat8 8.0.36-29.ep7.el6, tomcat7-lib 7.0.70-25.ep7.el6, tomcat8-lib 8.0.36-29.ep7.el6, tomcat7-jsvc 7.0.70-25.ep7.el6, tomcat8-jsvc 8.0.36-29.ep7.el6, +25 more Red Hat JBoss Web Server 3.1 for RHEL 7 tomcat7 7.0.70-25.ep7.el7, tomcat8 8.0.36-29.ep7.el7, tomcat7-lib 7.0.70-25.ep7.el7, tomcat8-lib 8.0.36-29.ep7.el7, tomcat7-jsvc 7.0.70-25.ep7.el7, tomcat8-jsvc 8.0.36-29.ep7.el7, +25 more
    fixed: vendor fix RHSA-2018:0466
  • Red Hat JBoss Enterprise Application Platform 5 tomcat-native tomcat-native
    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

3.53% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • Apache Software Foundation Apache Tomcat Native

Classification

Weakness
  • CWE-295 Improper Certificate Validation

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.