OSVDB ID: 32094 Title: Snort DCE/RPC Pre-Processor Packet Reassembly Remote Overflow |
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Description |
A remote overflow exists in Snort. The DCE/RPC Pre-Processor fails to check if traffic is part of a valid TCP session, and multiple "Write AndX" requests can be chained in the same TCP segment resulting in a stack overflow. With a specially crafted SMB packet, an attacker can cause arbitrary code execution resulting in a loss of integrity. |
Classification |
Location:
Remote / Network Access
Attack Type: Input Manipulation Impact: Loss of Integrity Solution: Workaround, Upgrade Exploit: Exploit Public, Exploit Commercial Disclosure: OSVDB Verified, Vendor Verified OSVDB: Security Software |
Solution |
Upgrade to version 2.6.1.3 or higher, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by implementing the following workaround: Disable the DCE/RPC preprocessor by removing the DCE/RPC preprocessor directives from snort.conf and restarting Snort. However, be advised that disabling the DCE/RPC preprocessor reduces detection capabilities for attacks in DCE/RPC traffic. |
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