It was discovered that Rsyslog improperly handled certain invalid input. An attacker could use this issue to cause Rsyslog to crash.
{ "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro", "binaries": [ { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-dbgsym" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-elasticsearch" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-elasticsearch-dbgsym" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-gnutls" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-gnutls-dbgsym" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-gssapi" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-gssapi-dbgsym" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-mysql" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-mysql-dbgsym" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-pgsql" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-pgsql-dbgsym" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-relp" }, { "binary_version": "8.16.0-1ubuntu3.1+esm1", "binary_name": "rsyslog-relp-dbgsym" } ] }