Vulnerability GHSA-45c3-73f7-pv4m

High Risk

15 days ago

dnspython dns.name.from_wire_parser() excessive CPU use

1.0.0 - 1.6.0 and 1.7.1 - 2.0.0rc1 and 2.0.0rc2 and 2.0.0 - 2.1.0rc1 and 2.1.0 - 2.2.0rc1 and 2.2.0 - 2.3.0rc1 and 2.3.0 - 2.4.0rc1 and 2.4.0 - 2.5.0rc1 and 2.5.0 - 2.6.0rc1 and 2.6.0 - 2.7.0rc1 and 2.7.0 - 2.8.0rc1 and 2.8.0

Summary

dnspython dns.name.from_wire_parser() excessive CPU use

Details

Impact

A maliciously crafted DNS message may cause dns.name.from_wire_parser() to use excessive CPU for DNS name decompression. Applications that process untrusted DNS wire form messages with dnspython may be degraded or DoS'd by the extra CPU use required.

Patches

This problem is fixed in dnspython 2.9.0.

Workarounds

There are no known workarounds.

Credit

Evgenios Gkritsis, Department of Informatics, University of Piraeus & Athena Research Center, Greece Constantinos Patsakis, Department of Informatics, University of Piraeus & Athena Research Center, Greece George Stergiopoulos, Department of Informatics, Athens University of Economics and Business, Greece