Application crash via use-after-free cleanup
Published Jan 14, 2022 · Updated Aug 4, 2024
Use-after-free in GNU Recutils 1.8.90 allows local users to crash recsel and recinf with crafted recfiles. The rec_record_destroy cleanup path releases record data incorrectly, leaving dangling structures that trigger double-free or invalid-free faults during record-set destruction. Exploitation requires local execution of an affected utility against attacker-controlled input and results in process termination or denial of service, without evidence of confidentiality or integrity compromise.
Summary
What happened
Use-after-free in GNU Recutils 1.8.90 allows local users to crash recsel and recinf with crafted recfiles. The rec_record_destroy cleanup path releases record data incorrectly, leaving dangling structures that trigger double-free or invalid-free faults during record-set destruction. Exploitation requires local execution of an affected utility against attacker-controlled input and results in process termination or denial of service, without evidence of confidentiality or integrity compromise.
The record
- CVE
- CVE-2021-46021
- Published
- Jan 14, 2022
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-416, T1499
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 14, 2022CVE publishedPublication date reported by the CVE source.
- Aug 4, 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
- GNU Recutils crafted recfile proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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