Vulnerability in Cisco Identity Services Engine Software
CVE-2019-1736
A vulnerability in the firmware of the Cisco UCS C-Series Rack Servers could allow an authenticated, physical attacker to bypass Unified Extensible Firmware Interface (UEFI) Secure Boot validation checks and load a compromised software image on an affected device. The vulnerability is due to improper validation of the server firmware upgrade images. An attacker could exploit this vulnerability by installing a server firmware version that would allow the attacker to disable UEFI Secure Boot. A successful exploit could allow the attacker to bypass the signature validation checks that are done by UEFI Secure Boot technology and load a compromised software image on the affected device. A compromised software image is any software image that has not been digitally signed by Cisco.
EPSS: 0.002 (16.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Cisco Identity Services Engine Software — versions n/a
- Cisco Fmc1000-k9_bios
- Cisco Fmc1000-k9_firmware
- Cisco Fmc2500-k9_bios
- Cisco Fmc2500-k9_firmware
- Cisco Fmc4500-k9_bios
- Cisco Fmc4500-k9_firmware
- Cisco Identity_services_engine — versions 2.4\(0.357\), 2.6\(0.156\)
- Cisco Sns-3515-k9_bios
- Cisco Sns-3515-k9_firmware
Weakness classification (CWE)
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2019-1736?
- CVE-2019-1736 is a medium-severity vulnerability in Cisco Identity Services Engine Software, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.6/10. Published 2020-09-23.
- How severe is CVE-2019-1736?
- Medium severity. CVSS v3 base score is 6.6 out of 10.