description: A vulnerability in the Simple Network Management Protocol (SNMP) service of Cisco FXOS Software for Firepower 4100 Series and Firepower 9300 Security Appliances and of Cisco UCS 6300 Series Fabric Interconnects could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to the improper handling of specific SNMP requests. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
Note: This vulnerability affects all supported SNMP versions. To exploit this vulnerability through SNMPv2c or earlier, an attacker must know the SNMP community string that is configured on an affected device. To exploit this vulnerability through SNMPv3, the attacker must have valid credentials for an SNMP user who is configured on the affected device.
problem types: Loop with Unreachable Exit Condition ('Infinite Loop')
affected:
{
vendor: Cisco
product: Cisco Unified Computing System (Managed)
versions:
version: 3.1(1e), status: affected
version: 3.1(1g), status: affected
version: 3.1(1h), status: affected
version: 3.1(1k), status: affected
version: 3.1(1l), status: affected
version: 3.1(2b), status: affected
version: 3.1(2c), status: affected
version: 3.1(2e), status: affected
version: 3.1(2f), status: affected
version: 3.1(2g), status: affected
version: 3.1(2h), status: affected
version: 3.1(3a), status: affected
version: 3.1(3b), status: affected
version: 3.1(3c), status: affected
version: 3.1(3d), status: affected
version: 3.1(3e), status: affected
version: 3.1(3f), status: affected
version: 3.1(3h), status: affected
version: 3.1(3j), status: affected
version: 3.1(3k), status: affected
version: 3.1(2d), status: affected
version: 3.1(3l), status: affected
version: 3.2(1d), status: affected
version: 3.2(2b), status: affected
version: 3.2(2c), status: affected
version: 3.2(2d), status: affected
version: 3.2(2e), status: affected
version: 3.2(2f), status: affected
version: 3.2(3a), status: affected
version: 3.2(3b), status: affected
version: 3.2(3d), status: affected
version: 3.2(3e), status: affected
version: 3.2(3g), status: affected
version: 3.2(3h), status: affected
version: 3.2(3i), status: affected
version: 3.2(3j), status: affected
version: 3.2(3k), status: affected
version: 3.2(3l), status: affected
version: 3.2(3n), status: affected
version: 3.2(3o), status: affected
version: 3.2(3p), status: affected
version: 4.0(1a), status: affected
version: 4.0(1b), status: affected
version: 4.0(1c), status: affected
version: 4.0(1d), status: affected
version: 4.0(2a), status: affected
version: 4.0(2b), status: affected
version: 4.0(2d), status: affected
version: 4.0(2e), status: affected
version: 4.0(4b), status: affected
version: 4.0(4c), status: affected
version: 4.0(4d), status: affected
version: 4.0(4e), status: affected
version: 4.0(4f), status: affected
version: 4.0(4g), status: affected
version: 4.0(4h), status: affected
version: 4.0(4a), status: affected
version: 4.0(4i), status: affected
version: 4.0(4k), status: affected
version: 4.0(4l), status: affected
version: 4.0(4m), status: affected
version: 4.0(4n), status: affected
version: 4.0(4o), status: affected
version: 4.1(1a), status: affected
version: 4.1(1b), status: affected
version: 4.1(1c), status: affected
version: 4.1(2a), status: affected
version: 4.1(1d), status: affected
version: 4.1(1e), status: affected
version: 4.1(2b), status: affected
version: 4.1(3a), status: affected
version: 4.1(3b), status: affected
version: 4.1(2c), status: affected
version: 4.1(3d), status: affected
version: 4.1(3c), status: affected
version: 4.1(3e), status: affected
version: 4.1(3f), status: affected
version: 4.1(3h), status: affected
version: 4.1(3i), status: affected
version: 4.1(3j), status: affected
version: 4.1(3k), status: affected
version: 4.2(1d), status: affected
version: 4.2(1c), status: affected
version: 4.2(1f), status: affected
version: 4.2(1i), status: affected
version: 4.2(1k), status: affected
version: 4.2(1l), status: affected
version: 4.2(1m), status: affected
version: 4.2(2a), status: affected
version: 4.2(2c), status: affected
version: 4.2(1n), status: affected
version: 4.2(2d), status: affected
version: 4.2(3b), status: affected
version: 4.2(2e), status: affected
}
{
vendor: Cisco
product: Cisco Firepower Extensible Operating System (FXOS)
versions:
version: 2.2.1.63, status: affected
version: 2.2.1.66, status: affected
version: 2.2.1.70, status: affected
version: 2.2.2.17, status: affected
version: 2.2.2.19, status: affected
version: 2.2.2.24, status: affected
version: 2.2.2.26, status: affected
version: 2.2.2.28, status: affected
version: 2.2.2.54, status: affected
version: 2.2.2.60, status: affected
version: 2.3.1.93, status: affected
version: 2.3.1.91, status: affected
version: 2.3.1.88, status: affected
version: 2.3.1.75, status: affected
version: 2.3.1.73, status: affected
version: 2.3.1.66, status: affected
version: 2.3.1.58, status: affected
version: 2.3.1.56, status: affected
}
metrics:
format: cvssV3_1
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
baseScore: 7.7
baseSeverity: HIGH
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: CHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
]
exploits: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.