title: Cisco IOS and IOS XE Software Hot Standby Router Protocol Information Leak Vulnerability
description: A vulnerability in the Hot Standby Router Protocol (HSRP) subsystem of Cisco IOS and IOS XE Software could allow an unauthenticated, adjacent attacker to receive potentially sensitive information from an affected device. The vulnerability is due to insufficient memory initialization. An attacker could exploit this vulnerability by receiving HSRPv2 traffic from an adjacent HSRP member. A successful exploit could allow the attacker to receive potentially sensitive information from the adjacent device.
problem types: CWE-665
affected:
{
product: Cisco IOS and IOS XE Software
vendor: Cisco
versions:
status: affected, version: 3.2.0SG
status: affected, version: 3.2.1SG
status: affected, version: 3.2.2SG
status: affected, version: 3.2.3SG
status: affected, version: 3.2.4SG
status: affected, version: 3.2.5SG
status: affected, version: 3.2.6SG
status: affected, version: 3.2.7SG
status: affected, version: 3.2.8SG
status: affected, version: 3.2.9SG
status: affected, version: 3.2.10SG
status: affected, version: 3.2.11SG
status: affected, version: 3.7.0S
status: affected, version: 3.7.1S
status: affected, version: 3.7.2S
status: affected, version: 3.7.3S
status: affected, version: 3.7.4S
status: affected, version: 3.7.5S
status: affected, version: 3.7.6S
status: affected, version: 3.7.7S
status: affected, version: 3.7.8S
status: affected, version: 3.7.4aS
status: affected, version: 3.7.2tS
status: affected, version: 3.7.0bS
status: affected, version: 3.7.1aS
status: affected, version: 3.3.0SG
status: affected, version: 3.3.2SG
status: affected, version: 3.3.1SG
status: affected, version: 3.8.0S
status: affected, version: 3.8.1S
status: affected, version: 3.8.2S
status: affected, version: 3.9.1S
status: affected, version: 3.9.0S
status: affected, version: 3.9.2S
status: affected, version: 3.9.1aS
status: affected, version: 3.9.0aS
status: affected, version: 3.2.0SE
status: affected, version: 3.2.1SE
status: affected, version: 3.2.2SE
status: affected, version: 3.2.3SE
status: affected, version: 3.3.0SE
status: affected, version: 3.3.1SE
status: affected, version: 3.3.2SE
status: affected, version: 3.3.3SE
status: affected, version: 3.3.4SE
status: affected, version: 3.3.5SE
status: affected, version: 3.3.0XO
status: affected, version: 3.3.1XO
status: affected, version: 3.3.2XO
status: affected, version: 3.4.0SG
status: affected, version: 3.4.2SG
status: affected, version: 3.4.1SG
status: affected, version: 3.4.3SG
status: affected, version: 3.4.4SG
status: affected, version: 3.4.5SG
status: affected, version: 3.4.6SG
status: affected, version: 3.4.7SG
status: affected, version: 3.4.8SG
status: affected, version: 3.5.0E
status: affected, version: 3.5.1E
status: affected, version: 3.5.2E
status: affected, version: 3.5.3E
status: affected, version: 3.10.0S
status: affected, version: 3.10.1S
status: affected, version: 3.10.2S
status: affected, version: 3.10.3S
status: affected, version: 3.10.4S
status: affected, version: 3.10.5S
status: affected, version: 3.10.6S
status: affected, version: 3.10.2aS
status: affected, version: 3.10.2tS
status: affected, version: 3.10.7S
status: affected, version: 3.10.8S
status: affected, version: 3.10.8aS
status: affected, version: 3.10.9S
status: affected, version: 3.10.10S
status: affected, version: 3.11.1S
status: affected, version: 3.11.2S
status: affected, version: 3.11.0S
status: affected, version: 3.11.3S
status: affected, version: 3.11.4S
status: affected, version: 3.12.0S
status: affected, version: 3.12.1S
status: affected, version: 3.12.2S
status: affected, version: 3.12.3S
status: affected, version: 3.12.0aS
status: affected, version: 3.12.4S
status: affected, version: 3.13.0S
status: affected, version: 3.13.1S
status: affected, version: 3.13.2S
status: affected, version: 3.13.3S
status: affected, version: 3.13.4S
status: affected, version: 3.13.5S
status: affected, version: 3.13.2aS
status: affected, version: 3.13.0aS
status: affected, version: 3.13.5aS
status: affected, version: 3.13.6S
status: affected, version: 3.13.7S
status: affected, version: 3.13.6aS
status: affected, version: 3.13.6bS
status: affected, version: 3.13.7aS
status: affected, version: 3.13.8S
status: affected, version: 3.13.9S
status: affected, version: 3.13.10S
status: affected, version: 3.6.0E
status: affected, version: 3.6.1E
status: affected, version: 3.6.0aE
status: affected, version: 3.6.0bE
status: affected, version: 3.6.2aE
status: affected, version: 3.6.2E
status: affected, version: 3.6.3E
status: affected, version: 3.6.4E
status: affected, version: 3.6.5E
status: affected, version: 3.6.6E
status: affected, version: 3.6.5aE
status: affected, version: 3.6.5bE
status: affected, version: 3.6.7E
status: affected, version: 3.6.8E
status: affected, version: 3.6.7aE
status: affected, version: 3.6.7bE
status: affected, version: 3.6.9E
status: affected, version: 3.6.9aE
status: affected, version: 3.14.0S
status: affected, version: 3.14.1S
status: affected, version: 3.14.2S
status: affected, version: 3.14.3S
status: affected, version: 3.14.4S
status: affected, version: 3.15.0S
status: affected, version: 3.15.1S
status: affected, version: 3.15.2S
status: affected, version: 3.15.1cS
status: affected, version: 3.15.3S
status: affected, version: 3.15.4S
status: affected, version: 3.3.0SQ
status: affected, version: 3.3.1SQ
status: affected, version: 3.4.0SQ
status: affected, version: 3.4.1SQ
status: affected, version: 3.7.0E
status: affected, version: 3.7.1E
status: affected, version: 3.7.2E
status: affected, version: 3.7.3E
status: affected, version: 3.7.4E
status: affected, version: 3.7.5E
status: affected, version: 3.5.0SQ
status: affected, version: 3.5.1SQ
status: affected, version: 3.5.2SQ
status: affected, version: 3.5.3SQ
status: affected, version: 3.5.4SQ
status: affected, version: 3.5.5SQ
status: affected, version: 3.5.6SQ
status: affected, version: 3.5.7SQ
status: affected, version: 3.5.8SQ
status: affected, version: 3.16.0S
status: affected, version: 3.16.1S
status: affected, version: 3.16.0aS
status: affected, version: 3.16.1aS
status: affected, version: 3.16.2S
status: affected, version: 3.16.2aS
status: affected, version: 3.16.0bS
status: affected, version: 3.16.0cS
status: affected, version: 3.16.3S
status: affected, version: 3.16.2bS
status: affected, version: 3.16.3aS
status: affected, version: 3.16.4S
status: affected, version: 3.16.4aS
status: affected, version: 3.16.4bS
status: affected, version: 3.16.4gS
status: affected, version: 3.16.5S
status: affected, version: 3.16.4cS
status: affected, version: 3.16.4dS
status: affected, version: 3.16.4eS
status: affected, version: 3.16.6S
status: affected, version: 3.16.5aS
status: affected, version: 3.16.5bS
status: affected, version: 3.16.7S
status: affected, version: 3.16.6bS
status: affected, version: 3.16.7aS
status: affected, version: 3.16.7bS
status: affected, version: 3.16.8S
status: affected, version: 3.17.0S
status: affected, version: 3.17.1S
status: affected, version: 3.17.2S
status: affected, version: 3.17.1aS
status: affected, version: 3.17.3S
status: affected, version: 3.17.4S
status: affected, version: 16.1.1
status: affected, version: 16.1.2
status: affected, version: 16.1.3
status: affected, version: 3.2.0JA
status: affected, version: 16.2.1
status: affected, version: 16.2.2
status: affected, version: 3.8.0E
status: affected, version: 3.8.1E
status: affected, version: 3.8.2E
status: affected, version: 3.8.3E
status: affected, version: 3.8.4E
status: affected, version: 3.8.5E
status: affected, version: 3.8.5aE
status: affected, version: 3.8.6E
status: affected, version: 3.8.7E
status: affected, version: 16.3.1
status: affected, version: 16.3.2
status: affected, version: 16.3.3
status: affected, version: 16.3.1a
status: affected, version: 16.3.4
status: affected, version: 16.3.5
status: affected, version: 16.3.5b
status: affected, version: 16.3.6
status: affected, version: 16.3.7
status: affected, version: 16.4.1
status: affected, version: 16.4.2
status: affected, version: 16.4.3
status: affected, version: 16.5.1
status: affected, version: 16.5.1a
status: affected, version: 16.5.1b
status: affected, version: 16.5.2
status: affected, version: 16.5.3
status: affected, version: 3.18.0aS
status: affected, version: 3.18.0S
status: affected, version: 3.18.1S
status: affected, version: 3.18.2S
status: affected, version: 3.18.3S
status: affected, version: 3.18.4S
status: affected, version: 3.18.0SP
status: affected, version: 3.18.1SP
status: affected, version: 3.18.1aSP
status: affected, version: 3.18.1gSP
status: affected, version: 3.18.1bSP
status: affected, version: 3.18.1cSP
status: affected, version: 3.18.2SP
status: affected, version: 3.18.1hSP
status: affected, version: 3.18.2aSP
status: affected, version: 3.18.1iSP
status: affected, version: 3.18.3SP
status: affected, version: 3.18.4SP
status: affected, version: 3.18.3aSP
status: affected, version: 3.18.3bSP
status: affected, version: 3.18.5SP
status: affected, version: 3.9.0E
status: affected, version: 3.9.1E
status: affected, version: 3.9.2E
status: affected, version: 3.9.2bE
status: affected, version: 16.6.1
status: affected, version: 16.6.2
status: affected, version: 16.6.3
status: affected, version: 16.6.4
status: affected, version: 16.6.4s
status: affected, version: 16.6.4a
status: affected, version: 16.7.1
status: affected, version: 16.7.1a
status: affected, version: 16.7.1b
status: affected, version: 16.7.2
status: affected, version: 16.8.1
status: affected, version: 16.8.1a
status: affected, version: 16.8.1b
status: affected, version: 16.8.1s
status: affected, version: 16.8.1c
status: affected, version: 16.8.1d
status: affected, version: 16.8.2
status: affected, version: 16.8.1e
status: affected, version: 16.9.1
status: affected, version: 16.9.1a
status: affected, version: 16.9.1b
status: affected, version: 16.9.1s
status: affected, version: 16.9.1c
status: affected, version: 16.9.1d
status: affected, version: 3.10.0E
status: affected, version: 3.10.1E
status: affected, version: 3.10.0cE
status: affected, version: 3.10.2E
status: affected, version: 3.10.1aE
status: affected, version: 3.10.1sE
}
metrics:
cvssV3_0: [
attackComplexity: LOW
attackVector: ADJACENT_NETWORK
availabilityImpact: NONE
baseScore: 4.3
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
version: 3.0
]
exploits: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.