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Category:   Device (Router/Bridge/Hub)  >   Juniper Junos Vendors:   Juniper
Juniper Junos LAST_ACK State Transition Bug Lets Remote Users Deny Service
SecurityTracker Alert ID:  1032842
SecurityTracker URL:
CVE Reference:   CVE-2015-5358   (Links to External Site)
Date:  Jul 10 2015
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Juniper Junos. A remote user can consume excessive resources on the target system.

A remote user can establish a TCP connection with the target device and then cause the connection to transition to the LAST_ACK state while the target daemon is not finished sending data to cause the socket to get stuck in the LAST_ACK state. As a result, the remote user can consume mbufs and connections.

A reboot or switchover of the master RE may be required to return the system to normal operations.

The vendor has assigned PR 1029758 to this vulnerability.

Impact:   A remote user can consume excessive mbuf and connection resources on the target system.
Solution:   The vendor has issued a fix (12.1X44-D50, 12.1X46-D35, 12.1X47-D25, 12.3R9, 12.3X48-D15, 13.2R7, 13.2X51-D35, 13.2X52-D25, 13.3R6, 14.1R3-S2, 14.1R4, 14.1X53-D12, 14.1X53-D16, 14.1X55-D25, 14.2R2, 15.1R1).

The vendor's advisory is available at:

Vendor URL: (Links to External Site)
Cause:   State error

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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