Privilege escalation in Cisco IOS XR Software
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-3473 |
| CWE-ID | CWE-264 |
| Exploitation vector | Local |
| Public exploit | N/A |
| 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 |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU46251
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 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco IOS XR: 5.0.0 - 7.0.1
Cisco IOS XRv 9000 Router: All versions
Cisco 8000 Series Routers: All versions
Cisco Network Convergence System 540 Series Routers: All versions
Cisco Network Convergence System 560 Series Routers: All versions
Cisco Network Convergence System 4000: All versions
Network Convergence System 5500 Series: All versions
Cisco Network Convergence System 6000 Series Routers: All versions
CPE2.3- cpe:2.3:o:cisco_systems:cisco_ios_xr:5.0.0:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios_xr:5.1.0:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios_xr:5.1.1:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios_xr:5.1.2:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios_xr:5.1.3:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios_xr:5.2.0:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios_xr:5.2.1:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios_xr:5.2.2:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios_xr:5.2.3:*:*:*:*:*:*:*
- cpe:2.3:o:cisco_systems:cisco_ios_xr:5.2.4:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_ios_xrv_9000_router:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_8000_series_routers:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_network_convergence_system_540_series_routers:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_network_convergence_system_560_series_routers:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_network_convergence_system_4000:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:network_convergence_system_5500_series:*:*:*:*:*:*:*:*
- cpe:2.3:h:cisco_systems:cisco_network_convergence_system_6000_series_routers:*:*:*:*:*:*:*:*
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.
