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March 08, 2023ravie lakshmanan

Jenkins Security Alert

A few severe safety vulnerabilities have been disclosed within the open supply Jenkins Automation Server that might result in code execution on particular programs.

The issues, tracked as CVE-2023-27898 and CVE-2023-27905, affect the Jenkins server and the Replace Heart, and have been collectively named core plague by cloud safety firm Aqua. All Jenkins variations previous to 2.319.2 are weak and exploitable.

“Exploiting these vulnerabilities might enable an unauthenticated attacker to execute arbitrary code on the sufferer’s Jenkins server, which could lead on to a whole compromise of the Jenkins server,” the corporate mentioned in a report shared with The Hacker Information.

The deficiencies are a results of how Jenkins processes plugins obtainable within the Replace Heart, doubtlessly permitting a risk actor to add a plugin with a malicious payload and triggering a cross-site scripting (XSS) assault.

“As soon as a sufferer opens the ‘Obtainable Plugins Supervisor’ on their Jenkins server, XSS is triggered, permitting attackers to execute arbitrary code on the Jenkins server utilizing the Script Console API,” Aqua mentioned.

Since additionally it is a case of saved XSS the place JavaScript code is injected on the server, the vulnerability could be triggered with out having to put in the plugin and even go to the plugin URL first.

Worryingly, the failings might additionally have an effect on self-hosted Jenkins servers and be exploited even in situations the place the server just isn’t publicly accessible by way of the Web, as attackers might “inject the general public Jenkins Replace Heart”.

Nevertheless, the assault depends on the prerequisite that the faux plugin is appropriate with the Jenkins server and seems on the prime of the principle supply on the “Obtainable Plugins Supervisor” web page.


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This, Aqua mentioned, could be manipulated by “loading a plugin that accommodates all standard plugin names and key phrases embedded within the description”, or artificially enhance the plugin’s obtain rely by sending faux occasion requests.

Following accountable disclosure on January 24, 2023, Jenkins launched patches for the Replace Heart and the server. Customers are really useful to replace their Jenkins server to the newest model obtainable to mitigate potential dangers.

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New Security Flaws Could Allow Code Execution Attacks

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