Service interruption via unbounded changelog template parsing
Published Dec 12, 2024 · Updated Dec 12, 2024
Resource exhaustion in affected GitLab releases allows remote authenticated users to interrupt service via a crafted changelog template. GitLab's TemplateParser passes attacker-controlled changelog_config.yml content to the Parslet PEG parser without a time limit, allowing pathological input to consume CPU. An authenticated user must supply the project changelog configuration and invoke changelog generation; the resulting CPU load degrades or interrupts the server.
Summary
What happened
Resource exhaustion in affected GitLab releases allows remote authenticated users to interrupt service via a crafted changelog template. GitLab's TemplateParser passes attacker-controlled changelog_config.yml content to the Parslet PEG parser without a time limit, allowing pathological input to consume CPU. An authenticated user must supply the project changelog configuration and invoke changelog generation; the resulting CPU load degrades or interrupts the server.
The record
- CVE
- CVE-2024-9367
- Published
- Dec 12, 2024
- Updated
- Dec 12, 2024
- Vendor
- GitLab
- Product
- GitLab
- Classifications
- CWE-770, T1499
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 12, 2024CVE publishedPublication date reported by the CVE source.
- Dec 12, 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=13.9 <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
- Malicious changelog_config.yml CPU-exhaustion proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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