CVE Vulnerabilities

CVE-2021-21604

Deserialization of Untrusted Data

Published: Jan 13, 2021 | Modified: Nov 21, 2024
CVSS 3.x
8
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
6 MEDIUM
AV:N/AC:M/Au:S/C:P/I:P/A:P
RedHat/V2
RedHat/V3
8 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Ubuntu

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier allows attackers with permission to create or configure various objects to inject crafted content into Old Data Monitor that results in the instantiation of potentially unsafe objects once discarded by an administrator.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Name Vendor Start Version End Version
Jenkins Jenkins * 2.263.1 (including)
Jenkins Jenkins * 2.274 (including)
Red Hat OpenShift Container Platform 3.11 RedHat jenkins-0:2.263.3.1612433584-1.el7 *
Red Hat OpenShift Container Platform 4.5 RedHat conmon-2:2.0.21-1.rhaos4.5.el7 *
Red Hat OpenShift Container Platform 4.5 RedHat jenkins-0:2.263.3.1612434332-1.el7 *
Red Hat OpenShift Container Platform 4.5 RedHat machine-config-daemon-0:4.5.0-202102050524.p0.git.2594.ff3b8c0.el8 *
Red Hat OpenShift Container Platform 4.5 RedHat openshift-0:4.5.0-202102050524.p0.git.0.9229406.el7 *
Red Hat OpenShift Container Platform 4.5 RedHat openshift-ansible-0:4.5.0-202102031005.p0.git.0.c6839a2.el7 *
Red Hat OpenShift Container Platform 4.5 RedHat openshift-clients-0:4.5.0-202102051529.p0.git.3612.61b096a.el7 *
Red Hat OpenShift Container Platform 4.5 RedHat runc-0:1.0.0-72.rhaos4.5.giteadfc6b.el8 *
Red Hat OpenShift Container Platform 4.6 RedHat jenkins-0:2.263.3.1612434510-1.el8 *

Potential Mitigations

  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

References