#VU63065 Use-after-free in Vim - CVE-2021-3796
Published: May 11, 2022
Vulnerability identifier: #VU63065
Vulnerability risk: High
CVSSv4.0: 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-2021-3796
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Vim
Vim
Software vendor:
Vim.org
Vim.org
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a use-after-free error. A remote attacker can trick the victim to open a specially crafted file, trigger a use-after-free error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install updates from vendor's website.
External links
- https://github.com/vim/vim/commit/35a9a00afcb20897d462a766793ff45534810dc3
- https://huntr.dev/bounties/ab60b7f3-6fb1-4ac2-a4fa-4d592e08008d
- http://www.openwall.com/lists/oss-security/2021/10/01/1
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TE62UMYBZE4AE53K6OBBWK32XQ7544QM/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S42L4Z4DTW4LHLQ4FJ33VEOXRCBE7WN4/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7K4JJBIH3OQSZRVTWKCJCDLGMFGQ5DOH/
- https://lists.debian.org/debian-lts-announce/2022/01/msg00003.html