CVE-2020-24340 Denial of service in n/a
A remote attacker can cause a denial of service in applications using picoTCP by sending malformed DNS responses that trigger an out-of-bounds read.
- 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-2020-24340?
CVE-2020-24340 is a high-severity denial of service vulnerability in n/a, published on 11 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in picoTCP and picoTCP-NG through 1.7.0. The code that processes DNS responses in pico_mdns_handle_data_as_answers_generic() in pico_mdns.c does not check whether the number of answers/responses specified in a DNS packet header corresponds to the response data available in the packet, leading to an out-of-bounds read, invalid pointer dereference, and Denial-of-Service.
Weakness: CWE-125
Which versions are affected by CVE-2020-24340?
It affects 2 products.
Products include Altran Picotcp, Altran Picotcp-Ng.
How do I fix CVE-2020-24340?
No fix has been published for CVE-2020-24340 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-2020-24340 being exploited?
There is no known exploitation of CVE-2020-24340 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-g85v-4g67-6899.