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Cisco Patches Serious Flaws in RV, SD-WAN, Umbrella Products

Cisco informed customers on Wednesday that patches are available for over a dozen critical and high severity vulnerabilities affecting the company’s RV series, SD-WAN, Umbrella and other products.

Two of the flaws have been rated “critical” by Cisco. One of them, CVE-2018-0423, is a buffer overflow vulnerability in the web-based management interface of various RV series firewalls and routers. The security hole allows a remote and unauthenticated attacker to cause a denial-of-service (DoS) condition or to execute arbitrary code.

The second flaw assigned a “critical” rating by the networking giant is CVE-2018-0435 and it impacts the Cisco Umbrella API. A remote attacker could leverage the vulnerability to read or modify data across multiple organizations, but exploitation requires authentication. Cisco noted that the bug has been addressed in the API and no user interaction is required to apply the patch.

The critical vulnerability affecting RV series devices was reported to Cisco by Qingtang Zheng of the 360 ESG CodeSafe Team, who also discovered three additional high severity flaws in the management interface of these products.

Two of the flaws allow an attacker to remotely gain access to sensitive information and one can be exploited for arbitrary command execution, but the latter requires authentication.

The Umbrella solution is also affected by some high severity flaws. Specifically, the Umbrella Enterprise Roaming client has a couple of weaknesses that can be exploited by an authenticated attacker to elevate privileges to “Administrator.” These issues were discovered by a researcher from Critical Start, which has published its own blog post providing detailed technical information.

Cisco’s SD-WAN solution is also impacted by high severity vulnerabilities. They can allow hackers to gain access to sensitive data, execute commands as root, and elevate privileges, but some require either local access and/or authentication.

The company also informed customers that patches are available for serious privilege escalation and information disclosure bugs in WebEx, a DoS flaw in Prime Access Registrar, a privilege escalation in Data Center Network Manager, and two command injections in the Integrated Management Controller (IMC) software.

Cisco is not aware of any instances where these vulnerabilities have been exploited for malicious purposes.

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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.