description: A vulnerability in the CDP processing feature of Cisco ISE could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition of the CDP process on an affected device. This vulnerability is due to insufficient bounds checking when an affected device processes CDP traffic. An attacker could exploit this vulnerability by sending crafted CDP traffic to the device. A successful exploit could cause the CDP process to crash, impacting neighbor discovery and the ability of Cisco ISE to determine the reachability of remote devices. After a crash, the CDP process must be manually restarted using the cdp enable command in interface configuration mode.
problem types: Out-of-bounds Write
affected:
{
vendor: Cisco
product: Cisco Identity Services Engine Software
versions:
version: 2.6.0, status: affected
version: 2.6.0 p1, status: affected
version: 2.6.0 p2, status: affected
version: 2.6.0 p3, status: affected
version: 2.6.0 p5, status: affected
version: 2.6.0 p6, status: affected
version: 2.6.0 p7, status: affected
version: 2.6.0 p8, status: affected
version: 2.6.0 p9, status: affected
version: 2.6.0 p10, status: affected
version: 2.6.0 p11, status: affected
version: 2.6.0 p12, status: affected
version: 2.7.0, status: affected
version: 2.7.0 p1, status: affected
version: 2.7.0 p2, status: affected
version: 2.7.0 p3, status: affected
version: 2.7.0 p4, status: affected
version: 2.7.0 p5, status: affected
version: 2.7.0 p6, status: affected
version: 2.7.0 p7, status: affected
version: 2.7.0 p9, status: affected
version: 3.0.0, status: affected
version: 3.0.0 p1, status: affected
version: 3.0.0 p2, status: affected
version: 3.0.0 p3, status: affected
version: 3.0.0 p4, status: affected
version: 3.0.0 p5, status: affected
version: 3.0.0 p6, status: affected
version: 3.1.0, status: affected
version: 3.1.0 p1, status: affected
version: 3.1.0 p3, status: affected
version: 3.1.0 p4, status: affected
version: 3.1.0 p5, status: affected
version: 3.1.0 p7, status: affected
version: 3.2.0, status: affected
version: 3.2.0 p1, status: affected
}
metrics:
format: cvssV3_1
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
baseScore: 4.3
baseSeverity: MEDIUM
attackVector: ADJACENT_NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: LOW
]
exploits: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.