Vulnerabilities > CVE-2021-36934 - Unspecified vulnerability in Microsoft products
Summary
<p>An elevation of privilege vulnerability exists because of overly permissive Access Control Lists (ACLs) on multiple system files, including the Security Accounts Manager (SAM) database. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p> <p>An attacker must have the ability to execute code on a victim system to exploit this vulnerability.</p> <p>After installing this security update, you <em>must</em> manually delete all shadow copies of system files, including the SAM database, to fully mitigate this vulnerabilty. <strong>Simply installing this security update will not fully mitigate this vulnerability.</strong> See <a href="https://support.microsoft.com/topic/1ceaa637-aaa3-4b58-a48b-baf72a2fa9e7">KB5005357- Delete Volume Shadow Copies</a>.</p>
Vulnerable Configurations
Related news
- Microsoft has a workaround for 'HiveNightmare' flaw: Nuke your shadow copies from orbit (source)
- How to Mitigate Microsoft Windows 10, 11 SeriousSAM Vulnerability (source)
- Windows “HiveNightmare” bug could leak passwords – here’s what to do! (source)
- CISA urges orgs to patch actively exploited Windows SeriousSAM bug (source)
- CISA orders federal agencies to update iPhones until Feb 25th (source)
- CISA orders federal agencies to update iPhones, Macs until Feb 25th (source)
- CISA tells agencies to patch actively exploited Chrome, Magento bugs (source)
References
- http://packetstormsecurity.com/files/164006/HiveNightmare-AKA-SeriousSAM.html
- http://packetstormsecurity.com/files/164006/HiveNightmare-AKA-SeriousSAM.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36934
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36934
- https://www.kb.cert.org/vuls/id/506989