CVE-2013-3461 Denial of service in n/a
Remote attackers can cause denial of service in Cisco Unified Communications Manager by flooding UDP port 5060 with SIP packets, consuming memory and CPU resources.
- 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-2013-3461?
CVE-2013-3461 is a high-severity denial of service vulnerability in Cisco Unified Communications Manager, published on 25 Aug 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cisco Unified Communications Manager (Unified CM) 8.5(x) and 8.6(x) before 8.6(2a)su3 and 9.x before 9.1(1) does not properly restrict the rate of SIP packets, which allows remote attackers to cause a denial of service (memory and CPU consumption, and service disruption) via a flood of UDP packets to port 5060, aka Bug ID CSCub35869.
Weakness: CWE-399
Which versions are affected by CVE-2013-3461?
It affects 1 product.
Products include Cisco Unified Communications Manager.
How do I fix CVE-2013-3461?
No fix has been published for CVE-2013-3461 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-2013-3461 being exploited?
There is no known exploitation of CVE-2013-3461 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-r7hf-97hq-qr83.