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The CVE in Jenkins ByteGuard Build Actions Plugin stems from a cleartext storage vulnerability within the plugin’s configuration mechanism. The plugin, designed to integrate build actions, improperly handles sensitive API tokens. Instead of utilizing Jenkins’s built-in credential management and storage system, which provides encryption, the plugin directly embeds these API tokens into the `config.xml` file of a Jenkins job. This file is stored on the controller’s filesystem in an unencrypted, plaintext format. Any user or process with access to the controller’s file system can directly read these tokens. Furthermore, the plugin’s job configuration form, accessible to users with Item/Extended Read permission, displays these tokens without masking them, akin to showing a password in a text field instead of obscuring it. This exposes the tokens to observation and capture through the web interface, significantly increasing the attack surface beyond just filesystem access.
Platform: Jenkins Plugin
Version: <= 1.0
Vulnerability : Cleartext Credentials
Severity: Moderate
date: 2024-10-29
Prediction: 2024-12-15
What Undercode Say:
`grep -r “apitoken” $JENKINS_HOME/jobs//config.xml`
`find $JENKINS_HOME -name “config.xml” -exec grep -l “ByteGuard” {} \;`
How Exploit:
An attacker with Item/Extended Read permission accesses the job configuration page and views the unmasked API token. Alternatively, an attacker with filesystem access navigates to the job’s directory, opens the `config.xml` file, and extracts the plaintext token.
Protection from this CVE
Uninstall the plugin. Monitor for an updated, patched version. Restrict filesystem and Item/Extended Read permissions.
Impact:
Unauthorized API access. Potential compromise of external systems.
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Sources:
Reported By: github.com
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