CVE-2021-1136

Multiple vulnerabilities in Cisco Network Convergence System (NCS) 540 Series Routers, only when running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for the Cisco 8000 Series Routers could allow an authenticated, local attacker to execute unsigned code during the boot process on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

CVSS v3 6.7 MEDIUM
CVSS v2.0 4.6 MEDIUM

6.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxr-l-zNhcGCBt	Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxr-l-zNhcGCBt	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:o:cisco:ios_xr::::::::
	cpe:2.3:o:cisco:ios_xr::::::::

OR	cpe:2.3:h:cisco:8201:-:::::::*
	cpe:2.3:h:cisco:8202:-:::::::*
	cpe:2.3:h:cisco:8808:-:::::::*
	cpe:2.3:h:cisco:8812:-:::::::*
	cpe:2.3:h:cisco:8818:-:::::::*

Configuration 2 (hide)

AND

cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*

cpe:2.3:h:cisco:ncs_540:-:*:*:*:*:*:*:*

History

21 Nov 2024, 05:43

Type	Values Removed	Values Added
References	~~() https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxr-l-zNhcGCBt - Vendor Advisory~~	() https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxr-l-zNhcGCBt - Vendor Advisory

Information

Published : 2021-02-04 17:15

Updated : 2024-11-21 05:43

NVD link : CVE-2021-1136

Mitre link : CVE-2021-1136

CVE.ORG link : CVE-2021-1136

JSON object : View

Products Affected

cisco

8201
8812
ios_xr
ncs_540
8808
8202
8818

CWE

CWE-347

Improper Verification of Cryptographic Signature

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