Jenkins Command Line Interface (CLI) Path Traversal Vulnerability
Jenkins Command Line Interface (CLI) contains a path traversal vulnerability that allows attackers limited read access to certain files, which can lead to code execution.
A remote attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. CISA has confirmed use of this vulnerability in known ransomware campaigns — treat as high priority for remediation. Federal agencies are required to remediate by 2024-09-09 under CISA BOD 22-01.
This is a Path Traversal (CWE-22) vulnerability in Jenkins Jenkins Command Line Interface (CLI). Jenkins 2.441 and earlier, LTS 2.426.2 and earlier does not disable a feature of its CLI command parser that replaces an '@' character followed by a file path in an argument with the file's contents, allowing unauthenticated attackers to read arbitrary files on the Jenkins controller file system. Exploitation requires remote network access, low attack complexity, no authentication required, and no user interaction required.
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Phishing link
🖼
Malicious file
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Server compromised
Probably yes if any of these apply:
Used in known ransomware campaigns. Threat-research write-up: http://packetstormsecurity.com/files/176840/Jenkins-2.441-LTS-2.426.3-Arbitrary-File-Read.html
Manual remediation steps
Apply the Vendor Patch
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog — apply the vendor's security update as soon as possible.
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
References
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References