Application crash via unbounded expression recursion
Published Jun 1, 2023 · Updated Aug 2, 2024
Denial of service in Janino 3.1.9 and earlier allows attackers to crash a host application by submitting a deeply nested expression. ExpressionEvaluator.guessParameterNames recursively parses nested parentheses without containing StackOverflowError, allowing parser recursion to exhaust the JVM thread stack. The host application must pass attacker-controlled source text to the API; the CVE is disputed because multiple parties contend that Janino is not intended for untrusted input.
Summary
What happened
Denial of service in Janino 3.1.9 and earlier allows attackers to crash a host application by submitting a deeply nested expression. ExpressionEvaluator.guessParameterNames recursively parses nested parentheses without containing StackOverflowError, allowing parser recursion to exhaust the JVM thread stack. The host application must pass attacker-controlled source text to the API; the CVE is disputed because multiple parties contend that Janino is not intended for untrusted input.
The record
- CVE
- CVE-2023-33546
- Published
- Jun 1, 2023
- Updated
- Aug 2, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, T1499.004
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 1, 2023CVE publishedPublication date reported by the CVE source.
- Aug 2, 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
- Issue 201 Java 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
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