Security Experts:

Critical Vulnerability Patched in Cisco Conferencing Product

Flaw in Cisco Meeting Server Allows Hackers to Impersonate Legitimate Users

A critical vulnerability in one of Cisco’s enterprise video conferencing products allows remote attackers to impersonate legitimate users, the networking giant warned on Wednesday.

The security hole, tracked as CVE-2016-6445, affects the Extensible Messaging and Presence Protocol (XMPP) service of the Cisco Meeting Server (CMS). The fact that the XMPP service incorrectly processes a deprecated authentication scheme allows an unauthenticated attacker to access the system as another user.

The vulnerability affects Cisco Meeting Server prior to version 2.0.6, and Acano Server prior to versions 1.8.18 and 1.9.6. The flaw can only be exploited if XMPP is enabled on these products and disabling the feature is considered a workaround.

The security hole was uncovered during a routine security audit of a Cisco customer and there is no evidence that it has been exploited in the wild.

Acano, a company specializing in video infrastructure and collaboration software, was acquired by Cisco in January. Meeting Server was officially announced in mid-August and is Cisco’s first product based on Acano technology.

Since it’s a new product, this is only the second advisory published by Cisco for Meeting Server. The first advisory, published in July, described a medium-severity persistent cross-site scripting (XSS) flaw that allowed an unauthenticated attacker to execute arbitrary code in the context of the product’s management interface.

Cisco recently discovered several vulnerabilities while analyzing a series of exploits leaked by a threat actor calling itself Shadow Brokers, which allegedly stole the files from the NSA-linked Equation Group. The company released security updates to patch the flaws, but researchers determined last month that tens of thousands and even hundreds of thousands of devices had still been vulnerable.

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Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.