Denial of service in Vim

1) NULL pointer dereference

EUVDB-ID: #VU74499

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-1355

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in within the class_object_index() function in vim9class.c in Vim. A remote attacker can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Vim: 9.0.0000 - 9.0.1401

External links

http://github.com/vim/vim/commit/d13dd30240e32071210f55b587182ff48757ea46
http://huntr.dev/bounties/4d0a9615-d438-4f5c-8dd6-aa22f4b716d9
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IE44W6WMMREYCW3GJHPSYP7NK2VT5NY6/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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