CVE-2020-6080 Denial of service in Videolabs
An attacker can cause a denial of service in libmicrodns by sending repeated mDNS messages that trigger a memory leak during error handling.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-6080?
CVE-2020-6080 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 24 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An exploitable denial-of-service vulnerability exists in the resource allocation handling of Videolabs libmicrodns 0.1.0. When encountering errors while parsing mDNS messages, some allocated data is not freed, possibly leading to a denial-of-service condition via resource exhaustion. An attacker can send one mDNS message repeatedly to trigger this vulnerability through the function rr_read_RR [5] reads the current resource record, except for the RDATA section. This is read by the loop at in rr_read. For each RR type, a different function is called. When the RR type is 0x10, the function rr_read_TXT is called at [6].
Weakness: CWE-401
Which versions are affected by CVE-2020-6080?
It affects 2 products.
Products include Debian Debian Linux, Videolabs Libmicrodns.
How do I fix CVE-2020-6080?
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-2020-6080 being exploited?
There is no known exploitation of CVE-2020-6080 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2020-6080, GHSA-v687-g54p-gvwj, UBUNTU-CVE-2020-6080.