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wnpa-sec-2017-26 · DNS dissector infinite loop

Summary

Name: DNS dissector infinite loop

Docid: wnpa-sec-2017-26

Date: June 1, 2017

Affected versions: 2.2.0 to 2.2.6, 2.0.0 to 2.0.12

Fixed versions: 2.2.7, 2.0.13

References:

Wireshark issue 13633.
CVE-2017-9345.

Details

Description

The DNS dissector could go into an infinite loop. Discovered by the OSS-Fuzz project.

Impact

It may be possible to make Wireshark consume excessive CPU resources by injecting a malformed packet onto the wire or by convincing someone to read a malformed packet trace file.

Resolution

Upgrade to Wireshark 2.2.7, 2.0.13 or later.