Denial of service in Vim

1) NULL pointer dereference

EUVDB-ID: #VU61332

Risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-46059

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 within the vim_regexec_multi() function in regexp.c in Vim. A remote attacker can trick the victim to open a specially crafted file and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Vim: 8.2.0 - 8.2.3882

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://bugzilla.redhat.com/show_bug.cgi?id=2039850

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.