7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.003 Low
EPSS
Percentile
65.2%
The agent-to-controller security subsystem limits which files on the Jenkins controller can be accessed by agent processes.
Multiple vulnerabilities in the file path filtering implementation of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier allow agent processes to read and write arbitrary files on the Jenkins controller file system, and obtain some information about Jenkins controller file systems.
SECURITY-2538 / CVE-2021-21692: The operations FilePath#renameTo
and FilePath#moveAllChildrenTo
only check read permission on the source path.
We expect that most of these vulnerabilities have been present since SECURITY-144 was addressed in the 2014-10-30 security advisory.
Jenkins 2.319, LTS 2.303.3 addresses these security vulnerabilities.
SECURITY-2538 / CVE-2021-21692: The operations FilePath#renameTo
and FilePath#moveAllChildrenTo
check both read and delete permissions on the source path.
As some common operations are now newly subject to access control, it is expected that plugins sending commands from agents to the controller may start failing. Additionally, the newly introduced path canonicalization means that instances using a custom builds directory (Java system property jenkins.model.Jenkins.buildsDir) or partitioning JENKINS_HOME
using symbolic links may fail access control checks. See the documentation for how to customize the configuration in case of problems.
If you are unable to immediately upgrade to Jenkins 2.319, LTS 2.303.3, you can install the Remoting Security Workaround Plugin. It will prevent all agent-to-controller file access using FilePath
APIs. Because it is more restrictive than Jenkins 2.319, LTS 2.303.3, more plugins are incompatible with it. Make sure to read the plugin documentation before installing it.
CPE | Name | Operator | Version |
---|---|---|---|
org.jenkins-ci.main:jenkins-core | le | 2.303.2 | |
org.jenkins-ci.main:jenkins-core | le | 2.318 |
github.com/advisories/GHSA-8xg4-xq2v-v6j7
github.com/jenkinsci/jenkins/commit/104c751d907919dd53f5090f84d53c671a66457b
github.com/jenkinsci/jenkins/commit/5a245e42979abe4a26d41727c839521e36cedd74
github.com/jenkinsci/jenkins/commit/63cde2daadc705edf086f2213b48c8c547f98358
nvd.nist.gov/vuln/detail/CVE-2021-21692
www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.003 Low
EPSS
Percentile
65.2%