Vulnerabilities

A Vulnerability is a state in a computing system (or set of systems) which either (a) allows an attacker to execute commands as another user, (b) allows an attacker to access data that is contrary to the specified access restrictions for that data, (c) allows an attacker to pose as another entity, or (d) allows an attacker to conduct a denial of service.Advisories relating to Symantec products may be viewed here.

Cisco Expressway Series and Telepresence VCS CVE-2019-12705 Cross Site Scripting Vulnerability

Risk:
High
Date Discovered:
October 16, 2019
Description:
Cisco Expressway Series and Telepresence Video Communication Server (VCS) is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input. An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to steal cookie-based authentication credentials and launch other attacks. This issue is being tracked by Cisco Bug ID CSCvq09300. The following Cisco products are affected: Cisco Expressway Series versions prior to X12.5.4 are vulnerable Cisco Telepresence Video Communication Server (VCS) versions prior to X12.5.4 are vulnerable
Technologies Affected
  • Cisco Expressway series X12.5.0
  • Cisco Expressway series X12.5.1
  • Cisco Expressway series X12.5.2
  • Cisco Expressway series X12.5.3
  • Cisco Expressway series X8.1
  • Cisco Expressway series X8.1.1
  • Cisco Expressway series X8.8.3
  • Cisco TelePresence Video Communication Server (VCS) X12.5
  • Cisco TelePresence Video Communication Server (VCS) X12.5.1
  • Cisco TelePresence Video Communication Server (VCS) X12.5.2
  • Cisco TelePresence Video Communication Server (VCS) X12.5.3
  • Cisco TelePresence Video Communication Server (VCS) X7.0
  • Cisco TelePresence Video Communication Server (VCS) X7.0.1
  • Cisco TelePresence Video Communication Server (VCS) X7.0.3
  • Cisco TelePresence Video Communication Server (VCS) X7.1
  • Cisco TelePresence Video Communication Server (VCS) X7.2
  • Cisco TelePresence Video Communication Server (VCS) X7.2.1
  • Cisco TelePresence Video Communication Server (VCS) X7.2.2
  • Cisco TelePresence Video Communication Server (VCS) X7.2.3
  • Cisco TelePresence Video Communication Server (VCS) X8
  • Cisco TelePresence Video Communication Server (VCS) X8.1
  • Cisco TelePresence Video Communication Server (VCS) X8.1.1
  • Cisco TelePresence Video Communication Server (VCS) X8.11.4
  • Cisco TelePresence Video Communication Server (VCS) X8.2
  • Cisco TelePresence Video Communication Server (VCS) X8.5 RC4
  • Cisco TelePresence Video Communication Server (VCS) X8.5.1
  • Cisco TelePresence Video Communication Server (VCS) X8.5.2
  • Cisco TelePresence Video Communication Server (VCS) X8.7.2
  • Cisco TelePresence Video Communication Server (VCS) X8.8.3
  • Cisco TelePresence Video Communication Server (VCS) X8.9.3
Recommendations
  • Block external access at the network boundary, unless external parties require service.
    Filter access to the affected computer at the network boundary if global access isn't needed. Restricting access to only trusted computers and networks might greatly reduce the likelihood of a successful exploit.
  • Run all software as a nonprivileged user with minimal access rights.
    Attackers may successfully exploit client flaws in the browser through cross-site scripting vulnerabilities. When possible, run all software as a user with minimal privileges and limited access to system resources. Use additional precautions such as restrictive environments to insulate software that may potentially handle malicious content.
  • Deploy network intrusion detection systems to monitor network traffic for malicious activity.
    Deploy NIDS to detect and block attacks and anomalous activity such as requests containing suspicious URI sequences. Since the webserver may log such requests, review its logs regularly.
  • Do not follow links provided by unknown or untrusted sources.
    Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.
Updates are available. Please see the references or vendor advisory for more information.
References
Credits
Colin Williams of Cisco
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