CVE-2014-3347 Denial of service in n/a
Remote attackers can cause a denial of service on Cisco routers with ISDN enabled by triggering a hardware encryption module failure.
- 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-2014-3347?
CVE-2014-3347 is a medium-severity denial of service vulnerability in Cisco Ios, published on 28 Aug 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cisco IOS 15.1(4)M2 on Cisco 1800 ISR devices, when the ISDN Basic Rate Interface is enabled, allows remote attackers to cause a denial of service (device hang) by leveraging knowledge of the ISDN phone number to trigger an interrupt timer collision during entropy collection, leading to an invalid state of the hardware encryption module, aka Bug ID CSCul77897.
Weakness: CWE-399
Which versions are affected by CVE-2014-3347?
It affects 8 products.
Products include Cisco 1801 Integrated Service Router, Cisco 1802 Integrated Service Router, Cisco 1803 Integrated Service Router, Cisco 1811 Integrated Service Router, Cisco 1812 Integrated Service Router, Cisco 1841 Integrated Service Router and 2 more.
How do I fix CVE-2014-3347?
No fix has been published for CVE-2014-3347 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-2014-3347 being exploited?
There is no known exploitation of CVE-2014-3347 in the wild and no public exploit code.
Sources
Also known as GHSA-w2gc-qf48-fjxq.