Remote code execution in Vim

1) Heap-based buffer overflow

EUVDB-ID: #VU81488

Risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-4751

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the utfc_ptr2len() function in mbyte.c. A remote attacker can trick the victim to open a specially crafted file, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Vim: 9.0.0000 - 9.0.1330

CPE2.3

• cpe:2.3:a:vim_org:vim:9.0.0000:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:9.0.0001:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:9.0.0002:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:9.0.0003:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:9.0.0004:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:9.0.0005:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:9.0.0006:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:9.0.0007:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:9.0.0008:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:9.0.0009:*:*:*:*:*:*:*

External links

https://huntr.dev/bounties/db7be8d6-6cb7-4ae5-9c4e-805423afa378
https://github.com/vim/vim/commit/e1121b139480f53d1b06f84f3e4574048108fa0b

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.