CVE-2023-29483: Dnspython

High severity, CVSS 7.0. EPSS: 1.9% chance of exploitation in the next 30 days.

eventlet before 0.35.2, as used in dnspython before 2.6.0, allows remote attackers to interfere with DNS name resolution by quickly sending an invalid packet from the expected IP address and source port, aka a "TuDoor" attack. In other words, dnspython does not have the preferred behavior in which the DNS name resolution algorithm would proceed, within the full time window, in order to wait for a valid packet. NOTE: dnspython 2.6.0 is unusable for a different reason that was addressed in 2.6.1.

Affected products

• Dnspython Dnspython: before 2.6.0 (fixed in 2.6.0)
• Eventlet Eventlet: before 0.35.2 (fixed in 0.35.2)
• Fedoraproject Fedora: version 38 only; version 39 only; version 40 only
• Netapp Bootstrap OS: affected versions not specified

Published 2024-04-11. Last modified 2026-06-17.