Session hijacking via dependency proxy path bypass
Published Dec 12, 2024 · Updated Dec 17, 2024
Privilege context switching in GitLab CE/EE allows remote authenticated users with a victim's CI job token to hijack that victim's session. The dependency proxy JWT authentication route strips session cookies from /v2 responses but failed to normalize the //v2 variant, which returned the cookie. Exploitation requires a live victim CI_JOB_TOKEN and victim interaction; the acquired session can impersonate the victim and mint a personal access token.
Summary
What happened
Privilege context switching in GitLab CE/EE allows remote authenticated users with a victim's CI job token to hijack that victim's session. The dependency proxy JWT authentication route strips session cookies from /v2 responses but failed to normalize the //v2 variant, which returned the cookie. Exploitation requires a live victim CI_JOB_TOKEN and victim interaction; the acquired session can impersonate the victim and mint a personal access token.
The record
- CVE
- CVE-2024-12570
- Published
- Dec 12, 2024
- Updated
- Dec 17, 2024
- Vendor
- GitLab
- Product
- GitLab
- Classifications
- CWE-270, T1550.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 12, 2024CVE publishedPublication date reported by the CVE source.
- Dec 17, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=13.7 <17.4.6
- Affected versionversion=17.5 <17.5.4
- Affected versionversion=17.6 <17.6.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Dependency proxy double-slash session-token proof of conceptproof of concept · demonstrated
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Technologies
Your stack
See the directory against your own environment.
Your stack
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