'Attackers may require access to the same XMPP domain or another method of access to be able to send messages to clients,' Cisco notes in an advisory. Watchcom reported four vulnerabilities to Cisco earlier this year, and they were disclosed by the networking giant in September. But three of them were not properly fixed in updates at the time, according to Watchcom. Watchcom probed the patches after a client requested an audit to check that the bugs had been sufficiently mitigated in Cisco's existing patches. Two of the three improperly patched bugs can be used to gain remote code execution. One of them can also be used to gain NT LAN Manager (NTLM) password hashes from users. 'Two of the vulnerabilities are caused by the ability to inject custom HTML tags into XMPP messages,' explains Watchcom's penetration tester, Olav Sortland Thoresen. 'The patch released in September only patched the specific injection points that Watchcom had identified. We were therefore able to find new injection points that could be used to exploit the vulnerabilities. 'Since some of the vulnerabilities are wormable, organizations should consider disabling communication with external organizations through Cisco Jabber until all employees have installed the update,' he added. SEE: Keeping data flowing could soon cost billions, business warnedĬisco also found two additional bugs in Jabber during internal testing. They are tracked as CVE-2020-27133 and CVE-2020-27134.ĬVE-2020-27134 is a vulnerability in the application protocol handling features of Jabber for Windows, which has a severity rating of eight out of 10.ĬVE-2020-27133 has a severity rating of 8.8 out of 10 and affects Jabber for Windows and Jabber for macOS. It may allow an authenticated, remote attacker to gain access to sensitive information. Cisco reveals this critical bug in Cisco Security Manager after exploits are posted – patch now.Windows 10: Using Cisco's Webex Meetings for remote work? Patch now, warns Cisco.Cisco security warning: Patch Webex Teams for Windows and surveillance camera now.Update now: Cisco warns over 25 high-impact flaws in its IOS and IOS XE software.

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