VDB-169220 · CVE-2021-1136 · GCVE-0-2021-1136

Cisco IOS XR signature verification

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Cisco IOS XR. The impacted element is an unknown function. Such manipulation leads to signature verification. This vulnerability is referenced as CVE-2021-1136. The attack can only be performed from a local environment. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Cisco IOS XR (Router Operating System) (affected version not known). Affected by this issue is some unknown functionality. The manipulation with an unknown input leads to a signature verification vulnerability. Using CWE to declare the problem leads to CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. Impacted is confidentiality, integrity, and availability.

The weakness was published 02/05/2021 as cisco-sa-ioxr-l-zNhcGCBt. The advisory is shared for download at tools.cisco.com. This vulnerability is handled as CVE-2021-1136. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Router Operating System

Vendor

Cisco

Name

IOS XR

License

commercial

Website

Vendor: https://www.cisco.com/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 6.7
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.7
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/13/2020 🔍
02/05/2021 +84 days 🔍
02/05/2021 +0 days 🔍
02/24/2021 +19 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-ioxr-l-zNhcGCBt
Status: Confirmed

CVE: CVE-2021-1136 (🔍)
GCVE (CVE): GCVE-0-2021-1136
GCVE (VulDB): GCVE-100-169220
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 02/05/2021 09:14
Updated: 02/24/2021 07:54
Changes: 02/05/2021 09:14 (37), 02/24/2021 07:51 (5), 02/24/2021 07:54 (17)
Complete: 🔍
Cache ID: 216::103