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.

• cisco fmc1000-k9 bios (< 4.0.1f.0) • cisco fmc1000-k9 firmware (< 4.0.2h) • cisco fmc2500-k9 bios (< 4.0.1f.0) • cisco fmc2500-k9 firmware (< 4.0.2h) • cisco fmc4500-k9 bios (< 4.0.1f.0) • cisco fmc4500-k9 firmware (< 4.0.2h) • cisco sns-3515-k9 bios (< 4.0.2d) • cisco sns-3515-k9 firmware (< 4.0.2h) • cisco sns-3595-k9 bios (< 4.0.2d) • cisco sns-3595-k9 firmware (< 4.0.2h) • cisco sns-3615-k9 bios (< 4.0.1i) • cisco sns-3615-k9 firmware (< 4.0.1g) • cisco sns-3655-k9 bios (< 4.0.1i) • cisco sns-3655-k9 firmware (< 4.0.1g) • cisco sns-3695-k9 bios (< 4.0.1i) • cisco sns-3695-k9 firmware (< 4.0.1g) • cisco tg5004-k9 bios (< 4.0.2d) • cisco tg5004-k9 firmware (< 4.0.2h) • cisco tg5004-k9-rf bios (< 4.0.2d) • cisco tg5004-k9-rf firmware (< 4.0.2h) • cisco identity services engine 2.4\(0.357\) • cisco identity services engine 2.6\(0.156\) • cisco unified computing system 3.2\(3h\)c