Arbitrary file write via newline filename parsing
Published Aug 31, 2022 · Updated Jun 9, 2025
Arbitrary file write in GNU gzip zgrep before 1.12 allows remote authenticated users to overwrite files via crafted multiline filenames. zgrep insufficiently validates filenames containing two or more newline characters, allowing embedded content and target paths to be interpreted as file operations. The attacker must cause zgrep to process a chosen filename; successful exploitation overwrites attacker-selected files, with possible broader system impact depending on writable paths.
Summary
What happened
Arbitrary file write in GNU gzip zgrep before 1.12 allows remote authenticated users to overwrite files via crafted multiline filenames. zgrep insufficiently validates filenames containing two or more newline characters, allowing embedded content and target paths to be interpreted as file operations. The attacker must cause zgrep to process a chosen filename; successful exploitation overwrites attacker-selected files, with possible broader system impact depending on writable paths.
The record
- CVE
- CVE-2022-1271
- Published
- Aug 31, 2022
- Updated
- Jun 9, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-20, CWE-179
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 31, 2022CVE publishedPublication date reported by the CVE source.
- Jun 9, 2025Record 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
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Public exploit references
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Technologies
Your stack
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