Cisco
cisco-sa-ucs-uefi-sb-bypass-eb6xC5GW
Cisco UCS and UCS-Based Appliances UEFI Shell Secure Boot Bypass Vulnerability
High7.1
เปิดประกาศต้นฉบับ
(เปิดในแท็บใหม่)
สรุปจากผู้ผลิต
A vulnerability in the Unified Extensible Firmware Interface (UEFI) Shell implementation of Cisco UCS Servers and UCS-based appliances could allow an authenticated attacker with valid credentials for a user account with the role of user or admin or an unauthenticated attacker with physical access to an affected device to bypass UEFI Secure Boot validation checks and execute unauthorized software.
This vulnerability is due to the availability of memory write commands in the UEFI Shell while UEFI Secure Boot is enabled on a device. An attacker could exploit this vulnerability by selecting the UEFI Shell boot option at boot time and using available shell commands to modify UEFI memory variables. A successful exploit could allow the attacker to manipulate the preboot environment, overwrite UEFI Secure Boot-related memory values, and execute unauthorized software on the affected device.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucs-uefi-sb-bypass-eb6xC5GW
Product ที่ได้รับผลกระทบ
Cisco Unified Computing System (Managed)
- เวอร์ชันที่ได้รับผลกระทบ
- 4.0(1a), 4.0(1b), 4.0(1c), 4.0(1d), 4.0(2a), 4.0(2b), 4.0(2d), 4.0(2e), 4.0(4b), 4.0(4c), 4.0(4d), 4.0(4e), 4.0(4f), 4.0(4g), 4.0(4h), 4.0(4a), 4.0(4i), 4.0(4k), 4.0(4l), 4.0(4m), 4.0(4n), 4.0(4o), 4.1(1a), 4.1(1b), 4.1(1c), 4.1(2a), 4.1(1d), 4.1(1e), 4.1(2b), 4.1(3a), 4.1(3b), 4.1(2c), 4.1(3d), 4.1(3c), 4.1(4a), 4.1(3e), 4.1(3f), 4.1(3h), 4.1(3i), 4.1(3j), 4.1(3k), 4.1(3l), 4.1(3m), 4.1(3n), 4.2(1d), 4.2(1c), 4.2(1f), 4.2(1i), 4.2(1k), 4.2(1l), 4.2(1m), 4.2(2a), 4.2(2c), 4.2(1n), 4.2(2d), 4.2(3b), 4.2(2e), 4.2(3d), 4.2(3e), 4.2(3g), 4.2(3h), 4.2(3i), 4.2(3j), 4.2(3k), 4.2(3l), 4.2(3m), 4.2(3n), 4.2(3o), 4.2(3p), 4.2(3r), 4.3(2b), 4.3(2c), 4.3(2e), 4.3(3a), 4.3(3c), 4.3(4a), 4.3(4b), 4.3(4c), 4.3(4d), 4.3(2f), 4.3(5a), 4.3(4e), 4.3(4f), 4.3(5c), 4.3(5d), 4.3(6a), 4.3(6b), 4.3(5e), 4.3(6c), 4.3(6d), 4.3(6e), 4.3(6f), 4.3(6g), 4.3(6h), 4.3(6i), 4.3(6j), 6.0(1b), 6.0(1c), 6.0(1d), 6.0(1e), 6.0(1f), 6.0(2b), 6.0(1h), 6.0(2c), 6.0(2d)
- เวอร์ชันที่แก้ไขแล้ว
- —
Cisco Unified Computing System (Standalone)
- เวอร์ชันที่ได้รับผลกระทบ
- 1.1(0.250016), 1.1(0.250022), 1.1(0.250025), 1.1(0.250026), 1.2(0.250011), 1.2(0.250013), 1.2(0.260005), 2.0(1.250096), 2.0(1.250127), 2.0(2.260062), 2.0(2.260101), 3.1(1d), 3.1(2b), 3.1(2c), 3.1(2d), 3.1(2e), 3.1(2g), 3.1(2i), 3.1(3a), 3.1(3b), 3.1(3c), 3.1(3d), 3.1(3g), 3.1(3h), 3.1(3i), 3.1(3j), 3.1(3k), 4.0(1.240), 4.0(1a), 4.0(1b), 4.0(1c), 4.0(1d), 4.0(1e), 4.0(1g), 4.0(1h), 4.0(2c), 4.0(2d), 4.0(2f), 4.0(2g), 4.0(2h), 4.0(2i), 4.0(2k), 4.0(2l), 4.0(2m), 4.0(2n), 4.0(4b), 4.0(4c), 4.0(4d), 4.0(4e), 4.0(4f), 4.0(4h), 4.0(4i), 4.0(4j), 4.0(4k), 4.0(4l), 4.0(4m), 4.0(2o), 4.0(2p), 4.0(4n), 4.0(2q), 4.0(2r), 4.0(1.260003), 4.0(1.260004), 4.1(1c), 4.1(1d), 4.1(1f), 4.1(1g), 4.1(2a), 4.1(1h), 4.1(2b), 4.1(2f), 4.1(2e), 4.1(3b), 4.1(2d), 4.1(3c), 4.1(3d), 4.1(2g), 4.1(3f), 4.1(2h), 4.1(2j), 4.1(2k), 4.1(2l), 4.1(3g), 4.1(3h), 4.1(3i), 4.1(3l), 4.1(2m), 4.1(3m), 4.1(3n), 4.2(1a), 4.2(1b), 4.2(1c), 4.2(1e), 4.2(1f), 4.2(1g), 4.2(1i), 4.2(1j), 4.2(2a), 4.2(2f), 4.2(2g), 4.2(3b), 4.2(3d), 4.2(3e), 4.2(3g), 4.2(3h), 4.2(3i), 4.2(3j), 4.2(3k), 4.2(3l), 4.2(3m), 4.2(3n), 4.2(3o), 4.2(3p), 4.2(3q), 4.2(3r), 4.3(1.230097), 4.3(1.230124), 4.3(1.230138), 4.3(2.230207), 4.3(2.230270), 4.3(2.240002), 4.3(3.240022), 4.3(2.240009), 4.3(3.240041), 4.3(3.240043), 4.3(4.240142), 4.3(2.240037), 4.3(2.240053), 4.3(4.240152), 4.3(4.242038), 4.3(2.240090), 4.3(5.240021), 4.3(2.240107), 4.3(4.242066), 4.3(5.250001), 4.3(2.250016), 4.3(2.250021), 4.3(5.250030), 4.3(2.250022), 4.3(6.250039), 4.3(6.250040), 4.3(2.240077), 4.3(4.242028), 4.3(4.241063), 4.3(5.250033), 4.3(6.250044), 4.3(2.250037), 4.3(6.250053), 4.3(2.250045), 4.3(4.252001), 4.3(4.252002), 4.3(4.241014), 4.3(2.250063), 4.3(6.250101), 4.3(6.250117), 4.3(5.250043), 4.3(5.250045), 4.3(6.250060), 4.3(6.260003), 4.3(6.260017), 4.3(2.260007), 4.3(6.260033), 6.0(1.251030), 6.0(1.250192), 6.0(1.250127), 6.0(1.250131), 6.0(1.250174), 6.0(1.250130), 6.0(1.250194), 6.0(1.260001), 6.0(1.251006), 6.0(2.260026), 6.0(2.260034), 6.0(2.260042), 6.0(2.260044), 6.0(2.260069), 1.0(0.240001), 1.0(0.250003), 1.0(1.250002), 1.0(1.250032)
- เวอร์ชันที่แก้ไขแล้ว
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Cisco Unified Computing System E-Series Software (UCSE)
- เวอร์ชันที่ได้รับผลกระทบ
- 4.11.1, 4.12.1, 4.12.2, 4.15.2, 4.15.3, 4.15.4
- เวอร์ชันที่แก้ไขแล้ว
- —
Cisco Enterprise NFV Infrastructure Software
- เวอร์ชันที่ได้รับผลกระทบ
- 3.5.1, 3.5.2, 3.6.1, 3.6.2, 3.6.3, 3.7.1, 3.8.1, 3.9.1, 3.9.2, 3.10.1, 3.10.2, 3.10.3, 3.11.1, 3.11.2, 3.11.3, 3.12.1, 3.12.2, 3.12.3, 4.1.1, 4.1.2, 3.3.1, 3.4.1, 4.2.1, 4.2.2, 4.4.2, 4.4.1, 4.4.3, 4.5.1, 4.6.1, 4.6.2-FC2, 4.6.2, 4.6.3, 4.6.3-FC4, 4.6.4, 4.7.1, 4.8.1, 4.8.2, 4.9.1, 4.9.2, 4.9.3, 4.9.4, 4.9.5, 4.9.4-FC3, 4.9.6, 4.9.10, 4.10.1, 4.11.1, 4.14.1, 4.12.1, 4.12.2, 4.12.3, 4.12.4, 4.12.5, 4.12.6, 4.12.7, 4.12.8, 4.15.1, 4.15.2, 4.15.3, 4.15.4, 4.15.5, 4.15.6, 4.13.1
- เวอร์ชันที่แก้ไขแล้ว
- —
CVE ที่เกี่ยวข้อง (1)
| CVE | CVSS | EPSS | KEV |
|---|---|---|---|
| CVE-2026-20293 | High7.1 v3.1 | 0.2% (P8) | — |
EPSS = โอกาสที่ช่องโหว่จะถูกใช้โจมตีใน 30 วันข้างหน้า (FIRST.org) · P = percentile