Local utility crash via underallocated key array
Published Jul 12, 2022 · Updated Aug 3, 2024
Buffer overflow in libguestfs key handling allows local users to crash affected utilities via repeated matching --key options. The get_keys() function uses MIN instead of MAX when sizing its result array, allocating only one key slot before the NULL terminator. Execution requires an affected utility to process multiple --key entries for the same encrypted block device; more than two entries cause out-of-bounds writes and commonly terminate the process with SIGSEGV.
Summary
What happened
Buffer overflow in libguestfs key handling allows local users to crash affected utilities via repeated matching --key options. The get_keys() function uses MIN instead of MAX when sizing its result array, allocating only one key slot before the NULL terminator. Execution requires an affected utility to process multiple --key entries for the same encrypted block device; more than two entries cause out-of-bounds writes and commonly terminate the process with SIGSEGV.
The record
- CVE
- CVE-2022-2211
- Published
- Jul 12, 2022
- Updated
- Aug 3, 2024
- Vendor
- Red Hat
- Product
- libguestfs
- Classifications
- CWE-119
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 12, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=none
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- Upstream virt-cat repeated-key crash reproducerproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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