// For flags

CVE-2018-8020

tomcat-native: Mishandled OCSP responses can allow clients to authenticate with revoked certificates

Severity Score

7.4
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 has a flaw that does not properly check OCSP pre-produced responses, which are lists (multiple entries) of certificate statuses. Subsequently, revoked client certificates may not be properly identified, allowing for users to authenticate with revoked certificates to connections that require mutual TLS. Users not using OCSP checks are not affected by this vulnerability.

Apache Tomcat Native desde la versión 1.2.0 hasta la 1.2.16 y desde la versión 1.1.23 hasta la 1.1.34 tiene un error por el cual no comprueba las respuestas OCSP preproducidas, las cuales son listas (múltiples entradas) de estados de certificados. Subsecuentemente, los certificados de cliente revocados no se identifican correctamente, lo que permite que los usuarios se autentiquen con certificados revocados en conexiones que requieren TLS mutuo. Los usuarios que no emplean comprobaciones OCSP no se han visto afectados por esta vulnerabilidad.

When using pre-produced responses from an OCSP responder, Tomcat Native did not correctly validate the status of certificates. This allowed for revoked client certificates to be incorrectly identified. It was therefore possible for users to authenticate with revoked certificates when using mutual TLS.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2018-03-09 CVE Reserved
  • 2018-07-31 CVE Published
  • 2024-09-17 CVE Updated
  • 2024-11-03 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-287: Improper Authentication
  • CWE-295: Improper Certificate Validation
CAPEC
References (15)
URL Tag Source
http://mail-archives.us.apache.org/mod_mbox/www-announce/201807.mbox/%3C20180721101944.GA45239%40minotaur.apache.org%3E Mailing List
http://www.securityfocus.com/bid/104934 Third Party Advisory
http://www.securitytracker.com/id/1041507 Third Party Advisory
https://lists.apache.org/thread.html/ba661b0edd913b39ff129a32d855620dd861883ade05fd88a8ce517d%40%3Cdev.tomcat.apache.org%3E Mailing List
https://lists.apache.org/thread.html/f8e0814e11c7f21f42224b6de111cb3f5e5ab5c15b78924c516d4ec2%40%3Cdev.tomcat.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r831e0548fad736a98140d0b3b7dc575af0c50faea0b266434ba813cc%40%3Cdev.rocketmq.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rb25b42f666d2cac5e6e6b3f771faf60d1f1aa58073dcdd8db14edf8a%40%3Cdev.rocketmq.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rcddf723a4b4117f8ed6042e9ac25e8c5110a617bab77694b61b14833%40%3Cdev.rocketmq.apache.org%3E Mailing List
https://lists.apache.org/thread.html/re3b72cbb13e1dfe85c4a06959a3b6ca6d939b407ecca80db12b54220%40%3Cdev.tomcat.apache.org%3E Mailing List
https://lists.apache.org/thread.html/rf8e8c091182b45daa50d3557cad9b10bb4198e3f08cf8f1c66a1b08d%40%3Cdev.tomcat.apache.org%3E Mailing List
https://lists.debian.org/debian-lts-announce/2018/08/msg00023.html Mailing List
URL Date SRC
URL Date SRC
URL Date SRC
https://access.redhat.com/errata/RHSA-2018:2469 2023-11-07
https://access.redhat.com/errata/RHSA-2018:2470 2023-11-07
https://access.redhat.com/security/cve/CVE-2018-8020 2018-08-16
https://bugzilla.redhat.com/show_bug.cgi?id=1581569 2018-08-16
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 8.0
Search vendor "Debian" for product "Debian Linux" and version "8.0"
-
Affected
Apache
Search vendor "Apache"
 Tomcat Native
Search vendor "Apache" for product "Tomcat Native"
 >= 1.1.23 <= 1.1.34
Search vendor "Apache" for product "Tomcat Native" and version " >= 1.1.23 <= 1.1.34"
-
Affected
Apache
Search vendor "Apache"
 Tomcat Native
Search vendor "Apache" for product "Tomcat Native"
 >= 1.2.0 <= 1.2.16
Search vendor "Apache" for product "Tomcat Native" and version " >= 1.2.0 <= 1.2.16"
-
Affected