#VU14427 Privilege escalation in Cisco Web Security Appliance - CVE-2018-0428

Vulnerability identifier: #VU14427

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-2018-0428

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Cisco Web Security Appliance
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists in the account management subsystem of Cisco Web Security Appliance (WSA) due to improper implementation of access controls. A local attacker can authenticate to the device, escape the CLI subshell and execute system-level commands on the underlying operating system as root.

Mitigation
The vulnerability has been fixed in the versions 10.1.3-054, 10.5.2-072.

Vulnerable software versions

Cisco Web Security Appliance: 10.0.0 959 - 11.5.0 FCS 000

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-wsa-escalati...

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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.