Interpreter crash via recursive warning generation
Published Aug 22, 2023 · Updated Oct 3, 2024
Infinite recursion in Perl 5.34.0 allows attackers to crash an interpreter process through an uninitialized-value warning. S_find_uninit_var in sv.c converts an undefined hash or array index while formatting that warning, recursively generating more warnings until the call stack is exhausted. The documented reproducer requires execution of Perl code with warnings enabled, and upstream evidence demonstrates process termination rather than code execution or privilege escalation.
Summary
What happened
Infinite recursion in Perl 5.34.0 allows attackers to crash an interpreter process through an uninitialized-value warning. S_find_uninit_var in sv.c converts an undefined hash or array index while formatting that warning, recursively generating more warnings until the call stack is exhausted. The documented reproducer requires execution of Perl code with warnings enabled, and upstream evidence demonstrates process termination rather than code execution or privilege escalation.
The record
- CVE
- CVE-2022-48522
- Published
- Aug 22, 2023
- Updated
- Oct 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, T1499.004
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Aug 22, 2023CVE publishedPublication date reported by the CVE source.
- Oct 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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Public exploit references
- Uninitialized hash-key crash reproducerproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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