Authorization bypass via ambiguous servlet matcher selection
Published Jul 18, 2023 · Updated Oct 25, 2024
Incorrect authorization in Spring Security before 5.8.5, 6.0.5, or 6.1.2 allows remote attackers to bypass access rules in affected branches. The string-based requestMatchers overload selects MVC matching whenever Spring MVC is present, without distinguishing endpoints belonging to another registered servlet. Exposure requires Spring MVC, multiple secured servlets, and a string matcher for a non-MVC endpoint, allowing requests to evade the intended authorization rule.
Summary
What happened
Incorrect authorization in Spring Security before 5.8.5, 6.0.5, or 6.1.2 allows remote attackers to bypass access rules in affected branches. The string-based requestMatchers overload selects MVC matching whenever Spring MVC is present, without distinguishing endpoints belonging to another registered servlet. Exposure requires Spring MVC, multiple secured servlets, and a string matcher for a non-MVC endpoint, allowing requests to evade the intended authorization rule.
The record
- CVE
- CVE-2023-34035
- Published
- Jul 18, 2023
- Updated
- Oct 25, 2024
- Vendor
- Spring
- Product
- Spring Security
- Classifications
- CWE-863, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 18, 2023CVE publishedPublication date reported by the CVE source.
- Oct 25, 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=Spring Security 5.8.0 to 5.8.4, Spring Security 6.0.0 to 6.0.4, Spring Security 6.1.0 to 6.1.1
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.
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