Remote code execution in Cisco WebEx Meetings Server

1) Improper input validation

EUVDB-ID: #VU12057

Risk: High

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Amber]

CVE-ID: CVE-2018-0112

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to execute arbitrary code on the target system.

The weakness exists due to insufficient input validation. A remote attacker can provide meeting attendees with a malicious Flash (.swf) file via the file-sharing capabilities of the client and execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update to version 2.8.1.2039.

Vulnerable software versions

Cisco WebEx Meetings Server: 2.7 - 3.0

CPE2.3

• cpe:2.3:a:cisco_systems:cisco_webex_meetings_server:2.7:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_webex_meetings_server:2.8:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_webex_meetings_server:3.0:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-wbs

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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