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Cisco Bug: CSCvt30182 - Cisco IOS, IOS XE, and NX-OS Software SGT Exchange Protocol Denial of Service Vulnerability

Last Modified

Jun 15, 2020

Products (1)

  • Cisco Nexus 1000V Switch for VMware vSphere

Known Affected Releases

5.2(1)SV3(3.2)

Description (partial)

Symptom:
A vulnerability in Security Group Tag Exchange Protocol (SXP) in Cisco IOS Software, Cisco IOS XE Software, and Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition.

The vulnerability exists because crafted SXP packets are mishandled. An attacker could exploit this vulnerability by sending specifically crafted SXP packets to the affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Cisco has published a security advisory containing additional details which is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sxp-68TEVzR

Conditions:
For information on fixed versions of software consult the Cisco Software checker:
https://tools.cisco.com/security/center/softwarechecker.x 

See Vulnerable Products Section of the advisory for full details:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sxp-68TEVzR#vp
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