An exploitable denial-of-service vulnerability exists in the TXT record-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing the RDATA section in a TXT record in mDNS messages, multiple integer overflows can be triggered, leading to a denial of service. An attacker can send an mDNS message to trigger this vulnerability.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://www.debian.org/security/2020/dsa-4671 | third party advisory vendor advisory |
| https://security.gentoo.org/glsa/202005-10 | third party advisory vendor advisory |
| https://talosintelligence.com/vulnerability_reports/TALOS-2020-0996 | third party advisory exploit technical description |