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AUSCERT External Security Bulletin Redistribution
Blind Reset Attack Using the RST/SYN Bit
21 May 2020
AusCERT Security Bulletin Summary
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2004-0230
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CVE-2004-0230 Blind Reset Attack Using the RST/SYN Bit
IR Number : FG-IR-16-039
Date : May 20, 2020
Risk : 3/5
Impact : Denial of Service (DoS)
CVE ID : CVE-2004-0230
TCP stacks that lack RFC 5961 3.2 & 4.2 support (or have it disabled at
application level) may allow remote attackers to guess sequence numbers and
cause a denial of service (connection loss) to persistent TCP connections by
repeatedly injecting a TCP RST or SYN packet.
Denial of Service (DoS)
FortiAnalyzer 6.2.3 and below
FortiManager 6.2.3 and below
Upgrade to FortiAnalyzer 6.2.4 or above
Upgrade to FortiManager 6.2.4 or above
Restrict hosts that can connect to the GUI to trusted ones only, with the
trusted host feature.
o The following issues reported by vulnerability scanners are directly linked
to this issue:
o "TCP Sequence Number Approximation Based Denial of Service"
o "Blind Reset Attack Using the RST/SYN Bit"
o CVE-2004-0230: https://nvd.nist.gov/vuln/detail/CVE-2004-0230
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