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Junos TCP Packet Handling Denial of Service Vulnerability
Information
Severity
Severity
Medium
Family
Family
JunOS Local Security Checks
CVSSv2 Base
CVSSv2 Base
4.3
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:M/Au:N/C:N/I:N/A:P
Solution Type
Solution Type
Vendor Patch
Created
Created
10 years ago
Modified
Modified
5 years ago
Summary
A vulnerability in the Flow Daemon can cause a crash when handling certain TCP packets.
Insight
Insight
On SRX Series services gateways, when plugins that use TCP proxy are configured (e.g. ALGs, UTM), a certain sequence of valid TCP packets may cause the flow daemon (flowd) to crash.
Affected Software
Affected Software
Platforms running Junos OS versions 10.4, 11.4, 12.1, 12.1X44, or 12.1X45.
Detection Method
Detection Method
Checks if a vulnerable OS build is present on the target host.
Solution
Solution
New builds of Junos OS software are available from Juniper. As a workaround disable ALGs and UTM features if they are not required.