Number: AV19-137
Date: 4 July 2019
On 3 July 2019, Cisco released several security advisories to address multiple vulnerabilities affecting Cisco products. A sample of the products and software of note are listed below:
Cisco Small Business Managed Switches (CVE-2019-1891)
- Weakness: Improper validation of HTTP requests
- Impact: Could allow an unauthenticated remote actor to cause a denial of service condition
Cisco Email Security Appliance (CVE-2019-1933)
- Weakness: Improper input validation of email fields
- Impact: Could allow an unauthenticated, remote actor to bypass configure filters on the device
Cisco Web Security Appliance Web Proxy (CVE-2019-1884)
- Weakness: Insufficient input validation
- Impact: Could allow an unauthenticated, remote actor to cause a denial of service condition
Cisco Jabber (CVE-2019-1855)
- Weakness: Insufficient validation of resources
- Impact: Could allow an authenticated, local actor to perform a DLL preloading attack
The Cyber Centre encourages users and administrators to review the Cisco Security Updates webpage and apply the necessary updates:
https://tools.cisco.com/security/center/publicationListing.x
Note to Readers
The Canadian Centre for Cyber Security (Cyber Centre) operates as part of the Communications Security Establishment. We are Canada’s national authority on cyber security and we lead the government’s response to cyber security events. As Canada's national computer security incident response team, the Cyber Centre works in close collaboration with government departments, critical infrastructure, Canadian businesses and international partners to prepare for, respond to, mitigate, and recover from cyber events. We do this by providing authoritative advice and support, and coordinating information sharing and incident response. The Cyber Centre is outward-facing, welcoming partnerships that help build a stronger, more resilient cyber space in Canada.