Process crash via unchecked membership-call arity
Published May 19, 2022 · Updated Aug 3, 2024
Denial of service in Open Policy Agent before 0.40.0 allows remote attackers to crash a consuming process with crafted Rego input. In ast/parser.go, parseSome and parseEvery accept malformed internal.member calls, then index absent arguments without first checking the call length. Exploitation requires a consuming application to pass attacker-controlled Rego to an affected parser entry point; the resulting Go panic interrupts only that process.
Summary
What happened
Denial of service in Open Policy Agent before 0.40.0 allows remote attackers to crash a consuming process with crafted Rego input. In ast/parser.go, parseSome and parseEvery accept malformed internal.member calls, then index absent arguments without first checking the call length. Exploitation requires a consuming application to pass attacker-controlled Rego to an affected parser entry point; the resulting Go panic interrupts only that process.
The record
- CVE
- CVE-2022-28946
- Published
- May 19, 2022
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 19, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- Malformed every-expression proof of conceptfunctional · demonstrated
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Technologies
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Your stack
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