Remote code execution in Microsoft SPNEGO Extended Negotiation (NEGOEX) Security Mechanism

1) Buffer overflow

EUVDB-ID: #VU67261

Risk: Critical

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-37958

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the SPNEGO Extended Negotiation (NEGOEX) Security Mechanism implementation. A remote non-authenticated attacker can send a specially crafted request to any application that is using NEGOEX authentication protocol, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of the vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 7 - XP

Windows Server: 2003 - 2022 20H2

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-37958
http://twitter.com/chompie1337/status/1602757336908660736

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.