#VU46251 Permissions, Privileges, and Access Controls in Cisco Systems, Inc products - CVE-2020-3473

Vulnerability identifier: #VU46251

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-3473

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Cisco IOS XR
Operating systems & Components / Operating system
Cisco IOS XRv 9000 Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco 8000 Series Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Network Convergence System 540 Series Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Network Convergence System 560 Series Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Network Convergence System 5500 Series
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Network Convergence System 6000 Series Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Network Convergence System 4000
Hardware solutions / Other hardware appliances

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect mapping of a command to task groups within the source code. A local user can bypass the task group–based checks and gain elevated privileges on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco IOS XR: 5.0.0, 5.1.0 - 5.1.3, 5.2.0 - 5.2.5, 5.3.0 - 5.3.3, 6.0.1 - 6.0.2, 6.1.1 - 6.1.4, 6.2.1 - 6.2.25, 6.3.2 - 6.3.15, 6.4.1 - 6.4.3, 6.5.2 - 6.5.3, 6.6.1 - 6.6.25, 6.7.1, 7.0.1

Cisco IOS XRv 9000 Router: before 6.6.3

Cisco 8000 Series Routers: before 7.0.12

Cisco Network Convergence System 540 Series Routers: before 6.6.3

Cisco Network Convergence System 560 Series Routers: before 6.6.3

Cisco Network Convergence System 4000: before 6.5.29

Network Convergence System 5500 Series: before 6.6.3

Cisco Network Convergence System 6000 Series Routers: before 6.6.3

---

External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-LJtNFjeN

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.