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.
総合評価: CVE-2019-1736 は低リスク(31.9/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 0.24%、15 パーセンタイル) 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置(高いほど相対的に深刻)を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ(新 − 旧) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.04% | 0.24% | +0.20% |
| 2 | 2023-03-07 | 0.89% | 0.04% | -0.84% |
| 3 | 2022-04-01 | — | 0.89% | — |
EPSS の全履歴 (全 6 件)
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 6.6 | 3.1 | MEDIUM |
|
0.7 | 5.9 | [email protected] |
| 6.2 | 3.0 | MEDIUM |
|
0.3 | 5.9 | [email protected] |
| 6.9 | 2.0 | MEDIUM |
|
3.4 | 10.0 | [email protected] |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| cisco | fmc1000-k9_bios | < 4.0.1f.0 | cpe:2.3:o:cisco:fmc1000-k9_bios:*:*:*:*:*:*:*:* |
| cisco | fmc1000-k9_firmware | < 4.0.2h | cpe:2.3:o:cisco:fmc1000-k9_firmware:*:*:*:*:*:*:*:* |
| cisco | fmc2500-k9_bios | < 4.0.1f.0 | cpe:2.3:o:cisco:fmc2500-k9_bios:*:*:*:*:*:*:*:* |
| cisco | fmc2500-k9_firmware | < 4.0.2h | cpe:2.3:o:cisco:fmc2500-k9_firmware:*:*:*:*:*:*:*:* |
| cisco | fmc4500-k9_bios | < 4.0.1f.0 | cpe:2.3:o:cisco:fmc4500-k9_bios:*:*:*:*:*:*:*:* |
| cisco | fmc4500-k9_firmware | < 4.0.2h | cpe:2.3:o:cisco:fmc4500-k9_firmware:*:*:*:*:*:*:*:* |
| cisco | sns-3515-k9_bios | < 4.0.2d | cpe:2.3:o:cisco:sns-3515-k9_bios:*:*:*:*:*:*:*:* |
| cisco | sns-3515-k9_firmware | < 4.0.2h | cpe:2.3:o:cisco:sns-3515-k9_firmware:*:*:*:*:*:*:*:* |
| cisco | sns-3595-k9_bios | < 4.0.2d | cpe:2.3:o:cisco:sns-3595-k9_bios:*:*:*:*:*:*:*:* |
| cisco | sns-3595-k9_firmware | < 4.0.2h | cpe:2.3:o:cisco:sns-3595-k9_firmware:*:*:*:*:*:*:*:* |
| cisco | sns-3615-k9_bios | < 4.0.1i | cpe:2.3:o:cisco:sns-3615-k9_bios:*:*:*:*:*:*:*:* |
| cisco | sns-3615-k9_firmware | < 4.0.1g | cpe:2.3:o:cisco:sns-3615-k9_firmware:*:*:*:*:*:*:*:* |
| cisco | sns-3655-k9_bios | < 4.0.1i | cpe:2.3:o:cisco:sns-3655-k9_bios:*:*:*:*:*:*:*:* |
| cisco | sns-3655-k9_firmware | < 4.0.1g | cpe:2.3:o:cisco:sns-3655-k9_firmware:*:*:*:*:*:*:*:* |
| cisco | sns-3695-k9_bios | < 4.0.1i | cpe:2.3:o:cisco:sns-3695-k9_bios:*:*:*:*:*:*:*:* |
| cisco | sns-3695-k9_firmware | < 4.0.1g | cpe:2.3:o:cisco:sns-3695-k9_firmware:*:*:*:*:*:*:*:* |
| cisco | tg5004-k9_bios | < 4.0.2d | cpe:2.3:o:cisco:tg5004-k9_bios:*:*:*:*:*:*:*:* |
| cisco | tg5004-k9_firmware | < 4.0.2h | cpe:2.3:o:cisco:tg5004-k9_firmware:*:*:*:*:*:*:*:* |
| cisco | tg5004-k9-rf_bios | < 4.0.2d | cpe:2.3:o:cisco:tg5004-k9-rf_bios:*:*:*:*:*:*:*:* |
| cisco | tg5004-k9-rf_firmware | < 4.0.2h | cpe:2.3:o:cisco:tg5004-k9-rf_firmware:*:*:*:*:*:*:*:* |
| cisco | identity_services_engine | 2.4\(0.357\) | cpe:2.3:a:cisco:identity_services_engine:2.4\(0.357\):*:*:*:*:*:*:* |
| cisco | identity_services_engine | 2.6\(0.156\) | cpe:2.3:a:cisco:identity_services_engine:2.6\(0.156\):*:*:*:*:*:*:* |
| cisco | unified_computing_system | 3.2\(3h\)c | cpe:2.3:a:cisco:unified_computing_system:3.2\(3h\)c:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200219-ucs-boot-bypass | Patch Vendor Advisory |