Privilege escalation in Cisco Network Convergence System 5000 Series

1) Privilege escalation

EUVDB-ID: #VU777

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-2016-6428

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

Exploit availability: No

Description

The vulnerability allows a local authenticated user to obtain root privileges on the target system.
The weakness is due to user permissions flaw that lets a malicious user to gain elevated privileges and cause arbitrary command execution with root privileges.
Successful exploitations of the vulnerability allows a local attacker to gain root privileges and execute arbitrary operating system commands on the vulnerable system.

Mitigation

Update to version 6.1.1.24i.BASE, 6.1.11.3i.BASE, 6.1.12.1i.BASE, 6.1.2.1i.BASE or 6.2.1.5i.BASE.

Vulnerable software versions

Cisco Network Convergence System 5000 Series: 6.1.1.BASE - 6.2.1.5i.BASE

CPE2.3

• cpe:2.3:h:cisco_systems:cisco_network_convergence_system_5000_series:6.1.1.BASE:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_network_convergence_system_5000_series:6.1.1.24i.BASE:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_network_convergence_system_5000_series:6.1.2.1i.BASE:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161005-iosxr

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.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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