Microsoft has revised the severity of a security vulnerability it originally patched in September 2022, upgrading it to “Critical” after it emerged that it could be exploited to achieve remote code execution.
Tracked as CVE-2022-37958 (CVSS score: 8.1), the flaw was previously described as an information disclosure vulnerability in SPNEGO Extended Negotiation (NEGOEX) Security Mechanism.
SPNEGO, short for Simple and Protected GSSAPI Negotiation Mechanism (SPNEGO), is a scheme that allows a client and remote server to arrive at a consensus on the choice of the protocol to be used (e.g., Kerberos or NTLM) for authentication.
But a further analysis of the flaw by IBM Security X-Force researcher Valentina Palmiotti found that it could allow remote execution of arbitrary code, prompting Microsoft to reclassify its severity.
images from Hacker News