In Wireshark 3.0.0 to 3.0.2, 2.6.0 to 2.6.9, and 2.4.0 to 2.4.15, the ASN.1 BER dissector and related dissectors could crash. This was addressed in epan/asn1.c by properly restricting buffer increments.
https://www.wireshark.org/security/wnpa-sec-2019-20.html
https://usn.ubuntu.com/4133-1/
https://lists.debian.org/debian-lts-announce/2021/02/msg00008.html
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=15870
http://www.securityfocus.com/bid/109293
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00027.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00068.html