CVE-2017-12997 Denial of service in n/a
An attacker can cause a denial of service in tcpdump by sending crafted LLDP packets that trigger an infinite loop in the parser.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-12997?
CVE-2017-12997 is a critical denial of service vulnerability in Tcpdump Tcpdump, published on 14 Sep 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The LLDP parser in tcpdump before 4.9.2 could enter an infinite loop due to a bug in print-lldp.c:lldp_private_8021_print().
Which versions are affected by CVE-2017-12997?
It affects 1 product.
Products include Tcpdump Tcpdump.
How do I fix CVE-2017-12997?
Upgrade to a fixed version.
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-2017-12997 being exploited?
There is no known exploitation of CVE-2017-12997 in the wild and no public exploit code.
Other vulnerabilities in Tcpdump Tcpdump
Sources
Also known as DEBIAN-CVE-2017-12997, GHSA-79qp-mxw3-p9vx, UBUNTU-CVE-2017-12997.