Vulnerability identifier: #VU63057

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3927

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Vim
Client/Desktop applications / Office applications

Vendor: Vim.org

Description

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

The vulnerability exists due to a boundary error. 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: 8.2.0 - 8.2.3580

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External links
http://huntr.dev/bounties/9c2b2c82-48bb-4be9-ab8f-a48ea252d1b0
http://github.com/vim/vim/commit/0b5b06cb4777d1401fdf83e7d48d287662236e7e
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PGW56Z6IN4UVM3E5RXXF4G7LGGTRBI5C/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BCQWPEY2AEYBELCMJYHYWYCD3PZVD2H7/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FNXY7T5OORA7UJIMGSJBGHFMU6UZWS6P/
http://www.openwall.com/lists/oss-security/2022/01/15/1
http://lists.debian.org/debian-lts-announce/2022/03/msg00018.html

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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.