CVE-2017-12260 Denial of service in Cisco Small Business SPA50x, SPA51x, and SPA52x Series IP Phones
Remote attackers can crash Cisco Small Business IP phones by sending malformed SIP messages, requiring a manual restart to recover.
- 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-2017-12260?
CVE-2017-12260 is a high-severity denial of service vulnerability in Cisco Small Business SPA50x, SPA51x, and SPA52x Series IP Phones, published on 19 Oct 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the implementation of Session Initiation Protocol (SIP) functionality in Cisco Small Business SPA50x, SPA51x, and SPA52x Series IP Phones could allow an unauthenticated, remote attacker to cause an affected device to become unresponsive, resulting in a denial of service (DoS) condition. The vulnerability is due to the improper handling of SIP request messages by an affected device. An attacker could exploit this vulnerability by using formatted specifiers in a SIP payload that is sent to an affected device. A successful exploit could allow the attacker to cause the affected device to become unresponsive, resulting in a DoS condition that persists until the device is restarted manually. This vulnerability affects Cisco Small Business SPA50x, SPA51x, and SPA52x Series IP Phones that are running firmware release 7.6.2SR1 or earlier. Cisco Bug IDs: CSCvc63986.
Weakness: CWE-119
Which versions are affected by CVE-2017-12260?
It affects 8 products.
Products include Cisco Spa 501g Firmware, Cisco Spa 502g Firmware, Cisco Spa 504g Firmware, Cisco Spa 508g Firmware, Cisco Spa 509g Firmware, Cisco Spa 512g Firmware and 2 more.
How do I fix CVE-2017-12260?
No fix has been published for CVE-2017-12260 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-2017-12260 being exploited?
There is no known exploitation of CVE-2017-12260 in the wild and no public exploit code.
Sources
Also known as GHSA-x6rw-m9v7-ff3g.