In Wireshark 3.2.0 to 3.2.4, the GVCP dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-gvcp.c by ensuring that an offset increases in all situations.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-15466
• https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=16029
• https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=11f40896b696e4e8c7f8b2ad96028404a83a51a4
• https://lists.debian.org/debian-lts-announce/2021/02/msg00008.html
• https://security.gentoo.org/glsa/202007-13
• https://www.wireshark.org/security/wnpa-sec-2020-09.html
• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00026.html
• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00038.html