The UNIX editor Vim prior to version 9.1.0678 has a use-after-free error in argument list handling. When adding a new file to the argument list, this triggers `Buf*` autocommands. If in such an autocommand the buffer that was just opened is closed (including the window where it is shown), this causes the window structure to be freed which contains a reference to the argument list that we are actually modifying. Once the autocommands are completed, the references to the window and argument list are no longer valid and as such cause an use-after-free. Impact is low since the user must either intentionally add some unusual autocommands that wipe a buffer during creation (either manually or by sourcing a malicious plugin), but it will crash Vim. The issue has been fixed as of Vim patch v9.1.0678.
History

Fri, 16 Aug 2024 20:30:00 +0000

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 16 Aug 2024 16:30:00 +0000

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Fri, 16 Aug 2024 13:15:00 +0000

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Metrics threat_severity

None

threat_severity

Low


Fri, 16 Aug 2024 00:00:00 +0000

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Description The UNIX editor Vim prior to version 9.1.0678 has a use-after-free error in argument list handling. When adding a new file to the argument list, this triggers `Buf*` autocommands. If in such an autocommand the buffer that was just opened is closed (including the window where it is shown), this causes the window structure to be freed which contains a reference to the argument list that we are actually modifying. Once the autocommands are completed, the references to the window and argument list are no longer valid and as such cause an use-after-free. Impact is low since the user must either intentionally add some unusual autocommands that wipe a buffer during creation (either manually or by sourcing a malicious plugin), but it will crash Vim. The issue has been fixed as of Vim patch v9.1.0678.
Title Vim heap-use-after-free in src/arglist.c:207
Weaknesses CWE-416
References
Metrics cvssV3_1

{'score': 4.5, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2024-08-15T23:47:38.255Z

Updated: 2024-09-20T16:03:11.152Z

Reserved: 2024-08-09T14:23:55.514Z

Link: CVE-2024-43374

cve-icon Vulnrichment

Updated: 2024-09-20T16:03:11.152Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2024-08-16T02:15:17.687

Modified: 2024-08-19T13:00:23.117

Link: CVE-2024-43374

cve-icon Redhat

Severity : Low

Publid Date: 2024-08-16T00:00:00Z

Links: CVE-2024-43374 - Bugzilla