Code execution via insert-completion out-of-bounds read
Published Aug 1, 2022 · Updated Aug 3, 2024
Heap-based buffer overflow in Vim before 9.0.0101 allows context-dependent attackers to execute code via a crafted file. In src/insexpand.c, ins_comp_get_next_word_or_line advances a line pointer by compl_length during insert-mode completion without verifying that the line contains that many bytes. Exploitation requires a user to open attacker-controlled content and invoke the affected completion path; the resulting over-read can crash the editor or enable code execution.
Summary
What happened
Heap-based buffer overflow in Vim before 9.0.0101 allows context-dependent attackers to execute code via a crafted file. In src/insexpand.c, ins_comp_get_next_word_or_line advances a line pointer by compl_length during insert-mode completion without verifying that the line contains that many bytes. Exploitation requires a user to open attacker-controlled content and invoke the affected completion path; the resulting over-read can crash the editor or enable code execution.
The record
- CVE
- CVE-2022-2571
- Published
- Aug 1, 2022
- Updated
- Aug 3, 2024
- Vendor
- Vim
- Product
- Vim
- Classifications
- CWE-122, T1204.002, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 1, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <9.0.0101
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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