CVE-2017-3790 Denial of service in Cisco Expressway Series Software and Cisco TelePresence VCS Software All versions prior to version X8.8.2 are vulnerable
Remote unauthenticated attackers can cause a denial of service by sending crafted H.323 RTP packets, crashing the Cisco Expressway or VCS system.
- 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-2017-3790?
CVE-2017-3790 is a high-severity denial of service vulnerability in Cisco Expressway Series Software and Cisco TelePresence VCS Software All versions prior to version X8.8.2 are vulnerable, published on 1 Feb 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the received packet parser of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) software could allow an unauthenticated, remote attacker to cause a reload of the affected system, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient size validation of user-supplied data. An attacker could exploit this vulnerability by sending crafted H.224 data in Real-Time Transport Protocol (RTP) packets in an H.323 call. An exploit could allow the attacker to overflow a buffer in a cache that belongs to the received packet parser, which will result in a crash of the application, resulting in a DoS condition. All versions of Cisco Expressway Series Software and Cisco TelePresence VCS Software prior to version X8.8.2 are vulnerable. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. Cisco Bug IDs: CSCus99263.
Which versions are affected by CVE-2017-3790?
It affects 2 products.
Products include Cisco Expressway, Cisco Telepresence Video Communication Server.
How do I fix CVE-2017-3790?
No fix has been published for CVE-2017-3790 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-2017-3790 being exploited?
There is no known exploitation of CVE-2017-3790 in the wild and no public exploit code.
Other vulnerabilities in Cisco Expressway Series Software and Cisco TelePresence VCS Software All versions prior to version X8.8.2 are vulnerable
- CVE-2024-20252 Cross-site request forgery in Cisco TelePresence Video Communication Server (VCS) Expressway
- CVE-2024-20254 Cross-site request forgery in Cisco TelePresence Video Communication Server (VCS) Expressway
- CVE-2022-20812 Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities
- CVE-2022-20813 Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities
- CVE-2024-20255 Cross-site request forgery in Cisco TelePresence Video Communication Server (VCS) Expressway
Sources
Also known as GHSA-4776-frm5-r3rr.