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Category:   Device (Router/Bridge/Hub)  >   Cisco NX-OS Vendors:   Cisco
Cisco NX-OS Telnet Login Banner Bug Lets Remote Users Deny Service
SecurityTracker Alert ID:  1032562
SecurityTracker URL:  http://securitytracker.com/id/1032562
CVE Reference:   CVE-2015-0775   (Links to External Site)
Date:  Jun 11 2015
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Cisco NX-OS. A remote user can cause denial of service conditions on the target system.

A remote user can send multiple requests for a certain type of terminal session via telnet to trigger a flaw in the message of the day (MOTD) banner function and cause the login process to reset.

The following devices and versions are affected:

Cisco Nexus 3000 Series; NX-OS Software release 7.2(0)ZN(99.67)
Cisco Nexus 4000 Series; NX-OS Software release 4.1(2)E1(1f)
Cisco Nexus 5000 Series; NX-OS Software release 6.0(2)N2(2)
Cisco Nexus 7000 Series; NX-OS Software release 6.2(12)
Cisco Nexus 9000 Series; NX-OS Software release 7.0(3)
Cisco Nexus 1000V Series; NX-OS Software release 5.2(1)SV3(2.1)

The vendor has assigned bug IDs CSCuo10554, CSCuu75466, CSCuu75471, CSCuu75484, CSCuu75498, CSCuu77182, and CSCuu77170 to this vulnerability affecting Cisco Nexus and Cisco MDS.

Impact:   A remote user can cause the login process to reset.
Solution:   The vendor has issued a fix.

The vendor's advisory is available at:

http://tools.cisco.com/security/center/viewAlert.x?alertId=39280

Vendor URL:  tools.cisco.com/security/center/viewAlert.x?alertId=39280 (Links to External Site)
Cause:   State error

Message History:   None.


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