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_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", "binary_version": "8.16.0-1ubuntu3.1+esm1" } ] }