CVE-2018-15391 Cisco Remote PHY IPv4 Fragment Denial of Service Vulnerability
Unauthenticated remote attackers can cause denial of service by sending malformed IPv4 fragments to Cisco Remote PHY devices.
- 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-2018-15391?
CVE-2018-15391 is a high-severity denial of service vulnerability in Cisco Remote PHY, published on 5 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in certain IPv4 fragment-processing functions of Cisco Remote PHY Software could allow an unauthenticated, remote attacker to impact traffic passing through a device, potentially causing a denial of service (DoS) condition. The vulnerability is due to the affected software not validating and calculating certain numerical values in IPv4 packets that are sent to an affected device. An attacker could exploit this vulnerability by sending malformed IPv4 traffic to an affected device. A successful exploit could allow the attacker to disrupt the flow of certain IPv4 traffic passing through an affected device, which could result in a DoS condition.
Which versions are affected by CVE-2018-15391?
It affects 1 product.
Products include Cisco Remote.
How do I fix CVE-2018-15391?
No fix has been published for CVE-2018-15391 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-2018-15391 being exploited?
There is no known exploitation of CVE-2018-15391 in the wild and no public exploit code.
Sources
Also known as GHSA-52rw-wpq3-w67j.