description: A vulnerability in the iPXE boot function of Cisco IOS XR software could allow an authenticated, local attacker to install an unverified software image on an affected device.
This vulnerability is due to insufficient image verification. An attacker could exploit this vulnerability by manipulating the boot parameters for image verification during the iPXE boot process on an affected device. A successful exploit could allow the attacker to boot an unverified software image on the affected device.
problem types: Improper Verification of Cryptographic Signature
affected:
{
vendor: Cisco
product: Cisco IOS XR Software
versions:
version: 5.2.0, status: affected
version: 5.2.1, status: affected
version: 5.2.2, status: affected
version: 5.2.4, status: affected
version: 5.2.3, status: affected
version: 5.2.5, status: affected
version: 5.2.47, status: affected
version: 5.3.0, status: affected
version: 5.3.1, status: affected
version: 5.3.2, status: affected
version: 5.3.3, status: affected
version: 5.3.4, status: affected
version: 6.0.0, status: affected
version: 6.0.1, status: affected
version: 6.0.2, status: affected
version: 6.1.1, status: affected
version: 6.1.2, status: affected
version: 6.1.3, status: affected
version: 6.1.4, status: affected
version: 6.1.12, status: affected
version: 6.1.22, status: affected
version: 6.1.32, status: affected
version: 6.1.36, status: affected
version: 6.1.42, status: affected
version: 6.2.1, status: affected
version: 6.2.2, status: affected
version: 6.2.3, status: affected
version: 6.2.25, status: affected
version: 6.2.11, status: affected
version: 6.3.2, status: affected
version: 6.3.3, status: affected
version: 6.3.15, status: affected
version: 6.4.1, status: affected
version: 6.4.2, status: affected
version: 6.4.3, status: affected
version: 6.5.1, status: affected
version: 6.5.2, status: affected
version: 6.5.3, status: affected
version: 6.5.25, status: affected
version: 6.5.26, status: affected
version: 6.5.28, status: affected
version: 6.5.29, status: affected
version: 6.5.32, status: affected
version: 6.5.33, status: affected
version: 6.6.2, status: affected
version: 6.6.3, status: affected
version: 6.6.25, status: affected
version: 6.6.4, status: affected
version: 7.0.1, status: affected
version: 7.0.2, status: affected
version: 7.0.12, status: affected
version: 7.0.14, status: affected
version: 7.1.1, status: affected
version: 7.1.15, status: affected
version: 7.1.2, status: affected
version: 7.1.3, status: affected
version: 6.7.1, status: affected
version: 6.7.2, status: affected
version: 6.7.3, status: affected
version: 6.7.4, status: affected
version: 7.2.0, status: affected
version: 7.2.1, status: affected
version: 7.2.2, status: affected
version: 7.3.1, status: affected
version: 7.3.15, status: affected
version: 7.3.2, status: affected
version: 7.3.3, status: affected
version: 7.3.5, status: affected
version: 7.4.1, status: affected
version: 7.4.2, status: affected
version: 6.8.1, status: affected
version: 6.8.2, status: affected
version: 7.5.1, status: affected
version: 7.5.3, status: affected
version: 7.5.2, status: affected
version: 7.5.4, status: affected
version: 7.6.1, status: affected
version: 7.6.2, status: affected
version: 7.7.1, status: affected
version: 7.7.2, status: affected
version: 7.7.21, status: affected
version: 6.9.1, status: affected
version: 6.9.2, status: affected
version: 7.8.1, status: affected
version: 7.8.2, status: affected
version: 7.9.1, status: affected
version: 7.9.2, status: affected
}
metrics:
format: cvssV3_1
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
baseScore: 6.7
baseSeverity: MEDIUM
attackVector: LOCAL
attackComplexity: LOW
privilegesRequired: HIGH
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
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.