SafeNET High Assurance Remote/SoftRemote (IPSecDrv.sys) remote DoS

Credit: mu-b
Risk: Low
Local: No
Remote: Yes

CVSS Base Score: 5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: None
Integrity impact: None
Availability impact: Partial

Attached is POC for a remote DoS in IPSecDrv.sys shipped with SafeNET High Assurance Remote and SoftRemote. The version tested is The bug itself is due to SafeNET making a complete hash of IPv6 support for IPSec. The result of the code is a complete DoS of the machine in Kernel mode whilst the driver proceeds to enter an infinite loop (apparently looking for a suitable IPSec extension header, which it will never find). The dodgy code can be found at offset 0x1000BEB0 of IPSecDrv.sys ( The attached code will only work over local subnets, however this is trivially remote with IPv6. PoC: hmmm, I wonder how SafeNET think they can charge for such a half-baked, crufty, god-awful implementation.... -- mu-b (mu-b at "Only a few people will follow the proof. Whoever does will spend the rest of his life convincing people it is correct." - Anonymous, "P ?= NP"

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