cbcvebase.
CVE-2015-0008
published 2015-02-11

CVE-2015-0008: The UNC implementation in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1…

PriorityP266high8.3CVSS 2.0
AVAACLAuNCCICAC
EXPLOIT
EPSS
28.58%
97.9th percentile
The UNC implementation in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 does not include authentication from the server to the client, which allows remote attackers to execute arbitrary code by making crafted data available on a UNC share, as demonstrated by Group Policy data from a spoofed domain controller, aka "Group Policy Remote Code Execution Vulnerability."

Affected

2 ranges
VendorProductVersion rangeFixed in
microsoftwindows_server_2008
microsoftwindows_server_2012

Detection & IOCsextracted from sources · hover to see the quote

registryMACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\AppInit_DLLs
registryMACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Key
filenameshare.dll
filenameGptTmpl.inf
path\\<host>\SYSVOL\share.dll
port445
port139
processrundll32.exe
  • Detect ARP spoofing activity targeting domain controllers and client machines simultaneously — a key step in this exploit to redirect SMB Group Policy traffic to a rogue server.
  • Alert on SMB connections (ports 445/139) being redirected via iptables DNAT rules, indicating a man-in-the-middle attack against Group Policy retrieval.
  • Monitor for AppInit_DLLs registry key being set to a UNC path (\\<host>\SYSVOL\share.dll), which is the SYSTEM-level persistence mechanism used by this exploit.
  • Monitor for Run registry key being set to execute rundll32.exe loading a DLL from a remote UNC SYSVOL path, indicating user-level persistence via Group Policy tampering.
  • Detect Group Policy template file (GptTmpl.inf) modifications that append registry key entries pointing to remote UNC DLL paths — a hallmark of this exploit's payload delivery.
  • Alert on rogue SMB servers (karmaSMB) responding to Group Policy requests with crafted gpt.ini and GptTmpl.inf files, especially when SMB2 support is enabled on non-DC hosts.
  • Detect msfvenom-generated reverse_tcp DLL payloads (shell.dll) being staged on SMB shares under SYSVOL paths, indicating active exploitation of CVE-2015-0008.
  • Monitor for ip_forward being enabled on Linux hosts alongside iptables NAT rules targeting ports 445/139, which is the network setup phase of this Group Policy MitM exploit.
  • ·The exploit depends on the attacker being able to ARP spoof between the target and one or more domain controllers — it is only effective on the same Layer 2 network segment.
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