Local service interruption via thread-creation memory leak
Published Jun 6, 2023 · Updated Aug 2, 2024
Memory leak in libpsx in libcap before 2.69 allows local users to exhaust process memory by forcing pthread_create failures. The __wrap_pthread_create() wrapper treats only -1 as failure even though pthread_create() returns a positive error code, leaving its allocated starter buffer unfreed when the thread routine never starts. Exploitation requires a local user able to make thread creation fail repeatedly in a process linked with libpsx, progressively consuming that process's memory until service interruption.
Summary
What happened
Memory leak in libpsx in libcap before 2.69 allows local users to exhaust process memory by forcing pthread_create failures. The __wrap_pthread_create() wrapper treats only -1 as failure even though pthread_create() returns a positive error code, leaving its allocated starter buffer unfreed when the thread routine never starts. Exploitation requires a local user able to make thread creation fail repeatedly in a process linked with libpsx, progressively consuming that process's memory until service interruption.
The record
- CVE
- CVE-2023-2602
- Published
- Jun 6, 2023
- Updated
- Aug 2, 2024
- Vendor
- Andrew G. Morgan
- Product
- libcap
- Classifications
- CWE-401, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 6, 2023CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=NA
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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