Privilege escalation in Cisco IOS XR Software

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU46252

Risk: Low

CVSSv3.1: 7.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3530

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to incorrect mapping in the source code of task group assignments for a specific command. A local user can issue the command, which they should not be authorized to issue and gain elevated privileges on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco IOS XR: 7.0.1 - 7.1.1

Cisco ASR 9000 Series Aggregation Services Routers: All versions

Cisco Network Convergence System 1000 Series: All versions

Cisco Network Convergence System 5000 Series: All versions

Network Convergence System 5500 Series: All versions

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-cli-privescl-sDVEmhqv

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.