Use After Free Affecting vim-minimal package, versions <2:9.1.785-1.amzn2023.0.1


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-AMZN2023-VIMMINIMAL-8381770
  • published15 Nov 2024
  • disclosed16 Aug 2024

Introduced: 16 Aug 2024

CVE-2024-43374  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 vim-minimal to version 2:9.1.785-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2024-761.

NVD Description

Note: Versions mentioned in the description apply only to the upstream vim-minimal package and not the vim-minimal package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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 Once the autocommands are completed, the references to the window and argument list are no longer valid and as such cause an use-after-free.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.

CVSS Scores

version 3.1