CVE-2019-1766 Cisco IP Phone 8800 Series File Upload Denial of Service Vulnerability
An authenticated remote attacker can cause a denial of service on Cisco IP Phones by uploading large files that exhaust disk space.
- 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-2019-1766?
CVE-2019-1766 is a high-severity denial of service vulnerability in Cisco IP Phone 8800 Series Software, published on 22 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the web-based management interface of Session Initiation Protocol (SIP) Software for Cisco IP Phone 8800 Series could allow an unauthenticated, remote attacker to cause high disk utilization, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software does not restrict the maximum size of certain files that can be written to disk. An attacker who has valid administrator credentials for an affected system could exploit this vulnerability by sending a crafted, remote connection request to an affected system. A successful exploit could allow the attacker to write a file that consumes most of the available disk space on the system, causing application functions to operate abnormally and leading to a DoS condition. This vulnerability affects Cisco IP Phone 8800 Series products running a SIP Software release prior to 12.5(1)SR1.
Weakness: CWE-20
Which versions are affected by CVE-2019-1766?
It affects 1 product.
Products include Cisco Ip Phone 8800 Firmware.
How do I fix CVE-2019-1766?
No fix has been published for CVE-2019-1766 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-2019-1766 being exploited?
There is no known exploitation of CVE-2019-1766 in the wild and no public exploit code.
Other vulnerabilities in Cisco IP Phone 8800 Series Software
Sources
Also known as GHSA-29px-fxx4-vhvc.