CVE-2014-1812

What it actually does

The flaw allows remote authenticated users with access to the SYSVOL share to retrieve XML files containing encrypted Group Policy Preferences passwords (cpassword attribute), decrypt them using publicly known methods, and obtain valid credentials for privilege escalation.

Why it matters to the business

Attackers can steal administrative credentials to compromise entire domains, enabling ransomware deployment such as Ghost (Cring) and causing operational disruption, data loss, and recovery costs; high urgency due to confirmed ransomware use and CISA KEV status with past remediation deadline.

How an attack unfolds

An attacker with domain credentials accesses the SYSVOL share on a domain controller, locates Group Policy Preferences XML files storing encrypted passwords, decrypts them offline, uses the recovered credentials to escalate privileges, and deploys ransomware campaigns like Ghost (Cring) as observed in the wild since 2014.

How to fix it

Remove all passwords from Group Policy Preferences configurations and avoid storing credentials in SYSVOL; migrate to supported Windows versions and modern credential management solutions such as LAPS or Azure AD; audit and clean existing GPP XML files across all domain controllers.

How to confirm the fix worked

Scan SYSVOL shares for XML files containing the cpassword attribute; confirm absence of such files after remediation and verify no legacy GPP password items remain in Group Policy objects.

Typical attack path

1. Obtain authenticated domain user access
2. Enumerate and access the SYSVOL share
3. Locate GPP XML files containing cpassword attributes
4. Decrypt stored passwords using known algorithms
5. Authenticate with recovered credentials for privilege escalation
6. Deploy ransomware or maintain persistence

How to detect it

Review file access logs on domain controllers for reads of .xml files under SYSVOL\Policies containing cpassword; search event logs for authentication events using credentials previously stored in GPP; correlate with known Ghost (Cring) ransomware indicators such as unusual scheduled tasks or lateral movement after SYSVOL access.

• cpassword=
• SYSVOL\Policies\
• *.xml files with Group Policy Preferences
• Decrypting GPP passwords tools or scripts
• Unauthorized reads of SYSVOL from non-domain-controller hosts

What your security team should do

• Immediately audit all SYSVOL shares for GPP XML files with stored passwords
• Remove any identified credentials and reconfigure policies without passwords
• Monitor authentication logs for anomalous use of recovered credentials
• Prioritize migration off unsupported Windows versions listed in the advisory
• Block or alert on unusual SYSVOL access patterns from non-admin accounts