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GHSA-3rq5-2g8h-59hc

Potential DoS via the Tudoor mechanism in eventlet and dnspython

Source: GitHub Advisory Database (reviewed) Moderate CVE-2023-29483

Packages

EcosystemPackageAffectedFixed in
PyPI eventlet < 0.35.2 0.35.2
PyPI dnspython < 2.6.1 2.6.1

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.