vim up to 9.1.677 use after free

Summaryinfo

A vulnerability was found in vim up to 9.1.677 and classified as critical. Affected by this vulnerability is an unknown functionality. The manipulation results in use after free. This vulnerability is cataloged as CVE-2024-43374. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in vim up to 9.1.677. Affected is an unknown code. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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 Once the autocommands are completed, the references to the window and argument list are no longer valid and as such cause an use-after-free.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

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2024-43374 since 08/09/2024. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 210682 (EulerOS 2.0 SP10 : vim (EulerOS-SA-2024-2898)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 9.1.0678 eliminates this vulnerability. Applying the patch 0a6e57b09bc8c76691b367a5babfb79b31b770e8 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (210682). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Word Processing Software

Name

• vim

Version

• 9.1.677

License

• open-source

Website

• Product: https://github.com/vim/vim/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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