Cisco WebEx Meetings Server XML External Entity (CVE-2018-18895)

DESCRIPTION

Cisco Webex Meetings Server includes a version of Castor XML that is affected by XXE. Because of that Cisco WebEx Meetings Server prior to versions 2.8MR3 and 3.0MR2 patch 1 are affected from XXE vulnerability. A remote unauthenticated attacker may lead to the disclosure of confidential data, denial of service, server side request forgery, port scanning from the perspective of the machine where the parser is located, and other system impacts by using this vulnerability.

Vulnerable path: /WBXServixe/XMLService

Vulnerable parametre: siteName

SOLUTION

Update current Cisco WebEx Meetings Server to 2.8MR3, 3.0MR2 patch 1, or the upcoming 4.0 release.

REFERENCES

You can find Cisco’s announcement from the link below:https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm56811

You can find more information about XXE from the link below:https://www.owasp.org/index.php/XML_External_Entity_(XXE)_Processing

Castor XML fixed this issue with CVE-2014-3004.

CREDIT

Alphan Yavas from Biznet Bilisim A.S.