What To Know About Microsoft’s Registry Hive Flaw: #SeriousSAM
Summary
The article discusses a privilege escalation vulnerability in Windows 10, known as #SeriousSAM or #HiveNightmare, identified by CVE-2021-36934. This flaw affects nearly all supported builds of Windows 10 and allows an attacker with limited access to escalate their privileges.
IFF Assessment
This vulnerability allows attackers to gain elevated privileges, which is detrimental to defenders.
Severity
The vulnerability allows for local privilege escalation, meaning an attacker needs some initial access but can then gain administrative rights, significantly increasing the impact of a compromise. The ease of exploitation for this type of flaw is generally high.
CISA KEV: Listed as actively exploited. Federal patch due: February 24, 2022. Known ransomware use: Unknown.
Defender Context
This vulnerability is a critical privilege escalation flaw that allows attackers with initial access to gain administrative control over Windows 10 systems. Defenders should prioritize patching this vulnerability and be vigilant for signs of exploitation, as it can be a key step in more complex attack chains.