Authenticated service interruption via quadratic package-name regex
Published Jan 15, 2021 · Updated Aug 4, 2024
Regular expression denial of service in GitLab allows remote authenticated users to interrupt service through malicious NuGet package uploads. The NuGet API applies a package-name regex whose execution time grows quadratically with malicious input length, consuming server processing capacity. A signed-in user able to upload a NuGet package can slow or deny API service; no data disclosure or modification is reported.
Summary
What happened
Regular expression denial of service in GitLab allows remote authenticated users to interrupt service through malicious NuGet package uploads. The NuGet API applies a package-name regex whose execution time grows quadratically with malicious input length, consuming server processing capacity. A signed-in user able to upload a NuGet package can slow or deny API service; no data disclosure or modification is reported.
The record
- CVE
- CVE-2020-26414
- Published
- Jan 15, 2021
- Updated
- Aug 4, 2024
- Vendor
- GitLab
- Product
- GitLab
- Classifications
- T1499.003
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 15, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>=12.4, <13.5.6
- Affected versionversion=>=13.6.0, <13.6.4
- Affected versionversion=>=13.7.0, <13.7.2
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
No public exploit references are available in this record.
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
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo