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CVE-2021-21609

UNKNOWN
Published 2021-01-13T15:55:31
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No CVSS data available

Description

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not correctly match requested URLs to the list of always accessible paths, allowing attackers without Overall/Read permission to access some URLs as if they did have Overall/Read permission.

Understanding This Vulnerability

This Common Vulnerabilities and Exposures (CVE) entry provides detailed information about a security vulnerability that has been publicly disclosed. CVEs are standardized identifiers assigned by MITRE Corporation to track and catalog security vulnerabilities across software and hardware products.

The severity rating (UNKNOWN) indicates the potential impact of this vulnerability based on the CVSS (Common Vulnerability Scoring System) framework. Higher severity ratings typically indicate vulnerabilities that could lead to more significant security breaches if exploited. Security teams should prioritize remediation efforts based on severity, exploit availability, and the EPSS (Exploit Prediction Scoring System) score, which predicts the likelihood of exploitation in the wild.

If this vulnerability affects products or systems in your infrastructure, we recommend reviewing the affected products section, checking for available patches or updates from vendors, and implementing recommended workarounds or solutions until a permanent fix is available. Organizations should also monitor security advisories and threat intelligence feeds for updates about active exploitation of this vulnerability.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

References

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Missing permission check for paths with specific prefix in Jenkins

GHSA-4625-q52w-39cx

Advisory Details

Jenkins includes a static list of URLs that are always accessible even without Overall/Read permission, such as the login form. These URLs are excluded from an otherwise universal permission check. Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not correctly compare requested URLs with that list. This allows attackers without Overall/Read permission to access plugin-provided URLs with any of the following prefixes if no other permissions are required: - `accessDenied` - `error` - `instance-identity` - `login` - `logout` - `oops` - `securityRealm` - `signup` - `tcpSlaveAgentListener` For example, a plugin contributing the path `loginFoo/` would have URLs in that space accessible without the default Overall/Read permission check. The Jenkins security team is not aware of any affected plugins as of the publication of this advisory. The comparison of requested URLs with the list of always accessible URLs has been fixed to only allow access to the specific listed URLs in Jenkins 2.275, LTS 2.263.2. In case this change causes problems, additional paths can be made accessible without Overall/Read permissions: The [Java system property](https://www.jenkins.io/doc/book/managing/system-properties/) `jenkins.model.Jenkins.additionalReadablePaths` is a comma-separated list of additional path prefixes to allow access to.

Affected Packages

Maven org.jenkins-ci.main:jenkins-core
ECOSYSTEM: ≥0 <2.263.2
Maven org.jenkins-ci.main:jenkins-core
ECOSYSTEM: ≥2.264 <2.275

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: October 27, 2023

References

Published: 2021-01-13T15:55:31
Last Modified: 2024-08-03T18:16:23.684Z
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