In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).
{ "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro", "ubuntu_priority": "medium", "binaries": [ { "libldap-2.4-2-dbg": "2.4.31-1+nmu2ubuntu8.5+esm2", "libldap2-dev-dbgsym": "2.4.31-1+nmu2ubuntu8.5+esm2", "slapd-dbg": "2.4.31-1+nmu2ubuntu8.5+esm2", "ldap-utils-dbgsym": "2.4.31-1+nmu2ubuntu8.5+esm2", "libldap-2.4-2-dbgsym": "2.4.31-1+nmu2ubuntu8.5+esm2", "libldap2-dev": "2.4.31-1+nmu2ubuntu8.5+esm2", "libldap-2.4-2": "2.4.31-1+nmu2ubuntu8.5+esm2", "slapd-smbk5pwd-dbgsym": "2.4.31-1+nmu2ubuntu8.5+esm2", "slapd-dbgsym": "2.4.31-1+nmu2ubuntu8.5+esm2", "slapd": "2.4.31-1+nmu2ubuntu8.5+esm2", "slapd-smbk5pwd": "2.4.31-1+nmu2ubuntu8.5+esm2", "ldap-utils": "2.4.31-1+nmu2ubuntu8.5+esm2" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libldap-2.4-2-dbg": "2.4.42+dfsg-2ubuntu3.8", "libldap2-dev-dbgsym": "2.4.42+dfsg-2ubuntu3.8", "slapd-dbg": "2.4.42+dfsg-2ubuntu3.8", "ldap-utils-dbgsym": "2.4.42+dfsg-2ubuntu3.8", "libldap-2.4-2-dbgsym": "2.4.42+dfsg-2ubuntu3.8", "libldap2-dev": "2.4.42+dfsg-2ubuntu3.8", "libldap-2.4-2": "2.4.42+dfsg-2ubuntu3.8", "slapd-smbk5pwd-dbgsym": "2.4.42+dfsg-2ubuntu3.8", "slapd-dbgsym": "2.4.42+dfsg-2ubuntu3.8", "slapd": "2.4.42+dfsg-2ubuntu3.8", "slapd-smbk5pwd": "2.4.42+dfsg-2ubuntu3.8", "ldap-utils": "2.4.42+dfsg-2ubuntu3.8" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "ldap-utils-dbgsym": "2.4.45+dfsg-1ubuntu1.5", "libldap-2.4-2-dbgsym": "2.4.45+dfsg-1ubuntu1.5", "libldap2-dev": "2.4.45+dfsg-1ubuntu1.5", "libldap-2.4-2": "2.4.45+dfsg-1ubuntu1.5", "slapd-smbk5pwd-dbgsym": "2.4.45+dfsg-1ubuntu1.5", "libldap-common": "2.4.45+dfsg-1ubuntu1.5", "slapd-dbgsym": "2.4.45+dfsg-1ubuntu1.5", "slapd": "2.4.45+dfsg-1ubuntu1.5", "slapd-smbk5pwd": "2.4.45+dfsg-1ubuntu1.5", "ldap-utils": "2.4.45+dfsg-1ubuntu1.5" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "slapd-contrib": "2.4.49+dfsg-2ubuntu1.2", "ldap-utils-dbgsym": "2.4.49+dfsg-2ubuntu1.2", "slapi-dev": "2.4.49+dfsg-2ubuntu1.2", "libldap-2.4-2-dbgsym": "2.4.49+dfsg-2ubuntu1.2", "libldap2-dev": "2.4.49+dfsg-2ubuntu1.2", "slapd-contrib-dbgsym": "2.4.49+dfsg-2ubuntu1.2", "libldap-2.4-2": "2.4.49+dfsg-2ubuntu1.2", "libldap-common": "2.4.49+dfsg-2ubuntu1.2", "slapd-dbgsym": "2.4.49+dfsg-2ubuntu1.2", "slapd": "2.4.49+dfsg-2ubuntu1.2", "slapd-smbk5pwd": "2.4.49+dfsg-2ubuntu1.2", "ldap-utils": "2.4.49+dfsg-2ubuntu1.2" } ] }