CVE-2017-6656 Denial of service in Cisco IP Phone 8800 Series
Unauthenticated remote attackers can cause a denial of service on Cisco IP Phones by triggering a SIP process restart, dropping all active calls.
- 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-2017-6656?
CVE-2017-6656 is a medium-severity denial of service vulnerability in Cisco IP Phone 8800 Series, published on 13 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in Session Initiation Protocol (SIP) call handling of Cisco IP Phone 8800 Series devices could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition due to the SIP process unexpectedly restarting. All active phone calls are dropped as the SIP process restarts. More Information: CSCvc29353. Known Affected Releases: 11.0(0.1). Known Fixed Releases: 11.0(0)MP2.153 11.0(0)MP2.62.
Weakness: CWE-20
Which versions are affected by CVE-2017-6656?
It affects 1 product.
Products include Cisco Ip Phone 8800 Series.
How do I fix CVE-2017-6656?
No fix has been published for CVE-2017-6656 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-2017-6656 being exploited?
There is no known exploitation of CVE-2017-6656 in the wild and no public exploit code.
Sources
Also known as GHSA-g24g-3vhv-96p3.