#VU70721 Out-of-bounds read in Vim - CVE-2023-0049

Vulnerability identifier: #VU70721

Vulnerability risk: Low

CVSSv4.0: 0.2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-0049

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Vim
Client/Desktop applications / Software for system administration

Vendor: Vim.org

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the build_stl_str_hl() function in buffer.c. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Vim: 9.0.0000 - 9.0.1142

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External links
https://github.com/vim/vim/commit/7b17eb4b063a234376c1ec909ee293e42cff290c
https://huntr.dev/bounties/5e6f325c-ba54-4bf0-b050-dca048fd3fd9

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.