CVE-2019-1845 Denial of service in Cisco TelePresence Video Communication Server (VCS)
Unauthenticated remote attackers can cause a denial of service by sending malformed XMPP requests, disrupting user authentication in Cisco Unified Communications products.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-1845?
CVE-2019-1845 is a high-severity denial of service vulnerability in Cisco TelePresence Video Communication Server (VCS), published on 5 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the authentication service of the Cisco Unified Communications Manager IM and Presence (Unified CM IM&P) Service, Cisco TelePresence Video Communication Server (VCS), and Cisco Expressway Series could allow an unauthenticated, remote attacker to cause a service outage for users attempting to authenticate, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient controls for specific memory operations. An attacker could exploit this vulnerability by sending a malformed Extensible Messaging and Presence Protocol (XMPP) authentication request to an affected system. A successful exploit could allow the attacker to cause an unexpected restart of the authentication service, preventing users from successfully authenticating. Exploitation of this vulnerability does not impact users who were authenticated prior to an attack.
Weakness: CWE-20
Which versions are affected by CVE-2019-1845?
It affects 2 products.
Products include Cisco Telepresence Video Communication Server, Cisco Unified Communications Manager Im and Presence Service.
How do I fix CVE-2019-1845?
No fix has been published for CVE-2019-1845 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-1845 being exploited?
There is no known exploitation of CVE-2019-1845 in the wild and no public exploit code.
Other vulnerabilities in Cisco TelePresence Video Communication Server (VCS)
- CVE-2023-20105 Privilege escalation in Cisco TelePresence Video Communication Server (VCS) Expressway
- CVE-2023-20192 Cisco Expressway Series and Cisco TelePresence Video Communication Server Privilege Escalation Vulnerabilities
- CVE-2022-20754 Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities
- CVE-2022-20755 Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities
- CVE-2016-1468 Command injection in n/a
Sources
Also known as GHSA-qfgg-fv6m-h7j6.