The CryptProtectMemory function in cng.sys (aka the Cryptography Next Generation driver) in the kernel-mode drivers 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, when the CRYPTPROTECTMEMORY_SAME_LOGON option is used, does not check an impersonation tokens level, which allows local users to bypass intended decryption restrictions by leveraging a service that (1) has a named-pipe planting vulnerability or (2) uses world-readable shared memory for encrypted data, aka CNG Security Feature Bypass Vulnerability or MSRC ID 20707.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Windows_7 | Microsoft | –sp1 (including) | –sp1 (including) |
| Windows_8 | Microsoft | - (including) | - (including) |
| Windows_8.1 | Microsoft | - (including) | - (including) |
| Windows_rt | Microsoft | - (including) | - (including) |
| Windows_rt_8.1 | Microsoft | - (including) | - (including) |
| Windows_server_2003 | Microsoft | –sp2 (including) | –sp2 (including) |
| Windows_server_2008 | Microsoft | –sp2 (including) | –sp2 (including) |
| Windows_server_2008 | Microsoft | r2-sp1 (including) | r2-sp1 (including) |
| Windows_server_2012 | Microsoft | - (including) | - (including) |
| Windows_server_2012 | Microsoft | r2 (including) | r2 (including) |
| Windows_vista | Microsoft | –sp2 (including) | –sp2 (including) |
References
- http://code.google.com/p/google-security-research/issues/detail?id=128
- http://www.securityfocus.com/bid/72461
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-010
- http://code.google.com/p/google-security-research/issues/detail?id=128
- http://www.securityfocus.com/bid/72461
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-010