CVE-2016-4421 Denial of service in n/a
Remote attackers can crash Wireshark via deeply nested ASN.1 BER packets, causing denial of service through stack consumption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-4421?
CVE-2016-4421 is a medium-severity denial of service vulnerability in Wireshark Wireshark, published on 1 May 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
epan/dissectors/packet-ber.c in the ASN.1 BER dissector in Wireshark 1.12.x before 1.12.10 and 2.x before 2.0.2 allows remote attackers to cause a denial of service (deep recursion, stack consumption, and application crash) via a packet that specifies deeply nested data.
Weakness: CWE-20
Which versions are affected by CVE-2016-4421?
It affects 1 product.
Products include Wireshark Wireshark.
How do I fix CVE-2016-4421?
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-2016-4421 being exploited?
There is no known exploitation of CVE-2016-4421 in the wild and no public exploit code.
Other vulnerabilities in Wireshark Wireshark
Sources
Also known as DEBIAN-CVE-2016-4421, GHSA-8r3g-vq4w-5379, UBUNTU-CVE-2016-4421.