OSVDB ID: 1377 Title: IPFilter Firewall SYN/RST Race Condition |
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Description |
IPFilter contains a flaw that may allow a remote attacker to bypass the ruleset. The issue is due to the presence of overlapping rules that relate to "return-rst" and "keep state". These two rules create a race condition that may allow an attacker to send the right sequence of packets to win, allowing them to bypass the filter rules completely. |
Classification |
Location:
Remote/Network Access Required
Attack Type: Input Manipulation, Race Condition Impact: Loss of Integrity Exploit: Exploit Available Disclosure: OSVDB Verified |
Solution |
Upgrade to version 3.3.16, 3.4.4 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds. |
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Credit |
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prettyhatemachine.obfuscation.org - Obfuscation Research Laboratories