CVE-2021-21691
published 2021-11-04CVE-2021-21691: Creating symbolic links is possible without the 'symlink' agent-to-controller access control permission in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.
PriorityP354critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
2.03%
78.7th percentile
Creating symbolic links is possible without the 'symlink' agent-to-controller access control permission in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| jenkins | jenkins | < 2.303.3 | 2.303.3 |
| jenkins | jenkins | < 2.319 | 2.319 |
| jenkins | jenkins_core | — | — |
| jenkins | jenkins_lts | — | — |
| jenkins | jenkins_weekly | — | — |
| jenkins | make_sure_to_read_the_plugin | — | — |
| jenkins | remoting_security_workaround_plugin | — | — |
| jenkins | shared_groovy_libraries_plugin | — | — |
| jenkins | subversion_plugin | — | — |
| jenkins_project | jenkins | unspecified – 2.318 | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
ghsa9.8CRITICAL
osv9.8CRITICAL
vendor_redhat9.8CRITICAL
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GHSA
Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
ghsa·2022-05-24·CVSS 9.8
CVE-2021-21691 [CRITICAL] CWE-59 Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
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-2531 / CVE-2021-21691: Creating symbolic links is possible without the `symlink` permission.
We expect that most of these vulnerabilities have been present since [SECURITY-144 was addressed in the 2014-10-30 security advisory](https://www.jenkins.io/security/advisory/2014-10
OSV
Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
osv·2022-05-24·CVSS 9.8
CVE-2021-21691 [CRITICAL] Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
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-2531 / CVE-2021-21691: Creating symbolic links is possible without the `symlink` permission.
We expect that most of these vulnerabilities have been present since [SECURITY-144 was addressed in the 2014-10-30 security advisory](https://www.jenkins.io/security/advisory/2014-10
GHSA
Improper Access Control in Onionshare
ghsa·2022-01-21
CVE-2022-21691 [MEDIUM] CWE-306 Improper Access Control in Onionshare
Improper Access Control in Onionshare
Between September 26, 2021 and October 8, 2021, [Radically Open Security](https://www.radicallyopensecurity.com/) conducted a penetration test of OnionShare 2.4, funded by the Open Technology Fund's [Red Team lab](https://www.opentech.fund/labs/red-team-lab/). This is an issue from that penetration test.
- Vulnerability ID: OTF-004
- Vulnerability type: Improper Access Control
- Threat level: Moderate
## Description:
Chat participants can spoof their channel leave message, tricking others into assuming they left the chatroom.
## Technical description:
This series of screenshots show Alice, Bob and Eve joined a chatroom and are the only participants in the chatroom. Eve seemingly leaves the chatroom, which leads Bob and Alice to believe they are
Jenkins
Jenkins Security Advisory 2021-11-04
vendor_jenkins·2021-11-04·CVSS 9.1
CVE-2021-21685 [CRITICAL] Jenkins Security Advisory 2021-11-04
Title: Jenkins Security Advisory 2021-11-04
Jenkins Security Advisory 2021-11-04
Jenkins Security Home
For Administrators
Overview
Terminology
Vulnerabilities and Scoring
Security Advisories
Security Issues
Advisory Schedule
Vulnerabilities in Plugins
How We Fix Security Issues
For Reporters
Reporting Vulnerabilities
Jenkins CNA
For Maintainers
Overview
Vulnerabilities in Plugins
Jenkins Security Team
About
Contributions
This advisory announces vulnerabilities in the following Jenkins deliverables:
Jenkins (core)
Subversion
Plugin
Descriptions
Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control
SECURITY-2455
/
CVE-2021-21685, CVE-2021-216
Red Hat
jenkins: Creating symbolic links is possible without the symlink permission
vendor_redhat·2021-11-04·CVSS 9.8
CVE-2021-21691 [CRITICAL] CWE-276 jenkins: Creating symbolic links is possible without the symlink permission
jenkins: Creating symbolic links is possible without the symlink permission
Creating symbolic links is possible without the 'symlink' agent-to-controller access control permission in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.
A vulnerability was found in Jenkins which failed to correctly validate permissions. This flaw allowed any user to create symbolic links regardless if they had the symlink permission. It may allow an attacker to read and write to arbitrary files on the Jenkins controller file system.
Mitigation: Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.
Package: jenkins (Red Hat Fuse 7) - Not affected
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-11-04
Published