Cisco informed customers on Wednesday that it has patched critical vulnerabilities in WebEx and UCS Director, along with nine high severity flaws in StarOS, IOS XR, Firepower and ASA products.
The WebEx vulnerability, tracked as CVE-2018-0112, is interesting because it allows a remote attacker to execute arbitrary code on a targeted user’s system by sending them a specially crafted Flash (.swf) file via the WebEx client’s file sharing capabilities during a meeting.
The flaw, discovered by Alexandros Zacharis of the European Union Agency for Network and Information Security (ENISA), affects WebEx Business Suite clients, WebEx Meetings, and WebEx Meetings Server. Cisco has released software updates that patch the vulnerability.
The Cisco Unified Computing System (UCS) Director product is affected by an information disclosure issue that allows an authenticated attacker to remotely access information on virtual machines in the end-user portal and perform any permitted operations. The issue, identified as CVE-2018-0238, was discovered by Cisco itself and patches are available.
Of the 30 advisories published by Cisco on Wednesday, nine describe high severity flaws, 18 are for medium severity issues, and one is informational.
The high severity vulnerabilities include denial-of-service (DoS) flaws in StarOS, IOS XR software, Firepower Detection Engine and 2100 series appliances, and several Adaptive Security Appliance (ASA) products; a session fixation issue affecting ASA, AnyConnect Secure Mobility, and Firepower Threat Defense (FTD); and an SSL certificate verification bypass bug affecting ASA.
According to Cisco, none of the vulnerabilities disclosed this week have been exploited in the wild. However, it’s important for Cisco customers to patch serious flaws as it’s not uncommon for malicious actors to exploit them in their operations.
Cisco has recently warned customers that the risk of exploitation for an IOS Smart Install vulnerability is high. The vulnerability, CVE-2018-0171, was disclosed recently and a proof-of-concept (PoC) exploit is available.
While this particular flaw has yet to be exploited in attacks, the risk is high due to the fact that Smart Install, along with other Cisco protocols, have been abused in malicious campaigns, including ones conducted by state-sponsored threat actors.
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