Remote code execution in Vim

1) Use-after-free

EUVDB-ID: #VU61763

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-2022-1154

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the utf_ptr2char() function in regexp_bt.c. 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 system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Vim: 8.2.0 - 8.2.4645

CPE2.3

• cpe:2.3:a:vim_org:vim:8.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:8.2.0000:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:8.2.0001:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:8.2.0002:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:8.2.0003:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:8.2.0004:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:8.2.0005:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:8.2.0006:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:8.2.0007:*:*:*:*:*:*:*
• cpe:2.3:a:vim_org:vim:8.2.0008:*:*:*:*:*:*:*

External links

https://huntr.dev/bounties/7f0ec6bc-ea0e-45b0-8128-caac72d23425
https://github.com/vim/vim/commit/b55986c52d4cd88a22d0b0b0e8a79547ba13e1d5

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.