CVE-2019-1736
Description
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.
How to fix
- cisco fmc1000-k9_bios4.0.1f.0 or later
- cisco fmc1000-k9_firmware4.0.2h or later
- cisco fmc2500-k9_bios4.0.1f.0 or later
- cisco fmc2500-k9_firmware4.0.2h or later
- cisco fmc4500-k9_bios4.0.1f.0 or later
- cisco fmc4500-k9_firmware4.0.2h or later
- cisco sns-3515-k9_bios4.0.2d or later
- cisco sns-3515-k9_firmware4.0.2h or later
- cisco sns-3595-k9_bios4.0.2d or later
- cisco sns-3595-k9_firmware4.0.2h or later
- cisco sns-3615-k9_bios4.0.1i or later
- cisco sns-3615-k9_firmware4.0.1g or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco unified_computing_system | 3.2\(3h\)c | — |
| cisco fmc1000-k9_bios | v < 4.0.1f.0 | 4.0.1f.0 |
| cisco fmc1000-k9_firmware | v < 4.0.2h | 4.0.2h |
| cisco fmc2500-k9_bios | v < 4.0.1f.0 | 4.0.1f.0 |
| cisco fmc2500-k9_firmware | v < 4.0.2h | 4.0.2h |
| cisco fmc4500-k9_bios | v < 4.0.1f.0 | 4.0.1f.0 |
| cisco fmc4500-k9_firmware | v < 4.0.2h | 4.0.2h |
| cisco sns-3515-k9_bios | v < 4.0.2d | 4.0.2d |
| cisco sns-3515-k9_firmware | v < 4.0.2h | 4.0.2h |
| cisco sns-3595-k9_bios | v < 4.0.2d | 4.0.2d |
| cisco sns-3595-k9_firmware | v < 4.0.2h | 4.0.2h |
| cisco sns-3615-k9_bios | v < 4.0.1i | 4.0.1i |
| cisco sns-3615-k9_firmware | v < 4.0.1g | 4.0.1g |
| cisco sns-3655-k9_bios | v < 4.0.1i | 4.0.1i |
| cisco sns-3655-k9_firmware | v < 4.0.1g | 4.0.1g |
| cisco sns-3695-k9_bios | v < 4.0.1i | 4.0.1i |
| cisco sns-3695-k9_firmware | v < 4.0.1g | 4.0.1g |
| cisco tg5004-k9_bios | v < 4.0.2d | 4.0.2d |
| cisco tg5004-k9_firmware | v < 4.0.2h | 4.0.2h |
| cisco tg5004-k9-rf_bios | v < 4.0.2d | 4.0.2d |
| cisco tg5004-k9-rf_firmware | v < 4.0.2h | 4.0.2h |
| cisco identity_services_engine | 2.4\(0.357\), 2.6\(0.156\) | — |
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