CVE-2020-24340: Altran Picotcp

High severity, CVSS 7.5. EPSS: 2.9% chance of exploitation in the next 30 days.

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.

Affected products

• Altran Picotcp: up to and including 1.7.0
• Altran Picotcp-NG: up to and including 1.7.0

Published 2020-12-11. Last modified 2026-06-17.