CVE-2017-3808 Denial of service in Cisco Unified Communications Manager
Unauthenticated remote attackers can cause a denial of service by flooding SIP messages, leading to unexpected device reloads in Cisco Unified Communications Manager.
- 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-2017-3808?
CVE-2017-3808 is a high-severity denial of service vulnerability in Cisco Unified Communications Manager, published on 20 Apr 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the Session Initiation Protocol (SIP) UDP throttling process of Cisco Unified Communications Manager (Cisco Unified CM) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient rate limiting protection. An attacker could exploit this vulnerability by sending the affected device a high rate of SIP messages. An exploit could allow the attacker to cause the device to reload unexpectedly. The device and services will restart automatically. This vulnerability affects Cisco Unified Communications Manager (CallManager) releases prior to the first fixed release; the following list indicates the first minor release that includes the fix for this vulnerability: 10.5.2.14900-16 11.0.1.23900-5 11.5.1.12900-2. Cisco Bug IDs: CSCuz72455.
Weakness: CWE-119
Which versions are affected by CVE-2017-3808?
It affects 1 product.
Products include Cisco Unified Communications Manager.
How do I fix CVE-2017-3808?
No fix has been published for CVE-2017-3808 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-2017-3808 being exploited?
There is no known exploitation of CVE-2017-3808 in the wild and no public exploit code.
Other vulnerabilities in Cisco Unified Communications Manager
- CVE-2026-20230 Cisco Unified Communications Manager Server-Side Request Forgery (SSRF)
- CVE-2026-20045 Cisco Unified Communications Products Code Injection
- CVE-2025-20309 Cisco Unified Communications Manager Static SSH Credentials Vulnerability
- CVE-2011-1643 Information disclosure in n/a
- CVE-2024-20253 Deserialization in Cisco Packaged Contact Center Enterprise
Sources
Also known as GHSA-grgm-fw5h-3qw3.