In Wireshark 3.0.0 to 3.0.6 and 2.6.0 to 2.6.12, the CMS dissector could crash. This was addressed in epan/dissectors/asn1/cms/packet-cms-template.c by ensuring that an object identifier is set to NULL after a ContentInfo dissection.

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-19553
• https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=15961
• https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=34d2e0d5318d0a7e9889498c721639e5cbf4ce45
• https://lists.debian.org/debian-lts-announce/2021/02/msg00008.html
• https://www.oracle.com/security-alerts/cpuapr2020.html
• https://www.wireshark.org/security/wnpa-sec-2019-22.html
• http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00027.html