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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0429 USN-4724-1: OpenLDAP vulnerabilities 9 February 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: OpenLDAP Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-36230 CVE-2020-36229 CVE-2020-36228 CVE-2020-36227 CVE-2020-36226 CVE-2020-36225 CVE-2020-36224 CVE-2020-36223 CVE-2020-36222 CVE-2020-36221 Reference: ESB-2021.0391 Original Bulletin: https://ubuntu.com/security/notices/USN-4724-1 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4724-1: OpenLDAP vulnerabilities 08 February 2021 Several security issues were fixed in OpenLDAP. Releases o Ubuntu 20.10 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS Packages o openldap - Lightweight Directory Access Protocol Details It was discovered that OpenLDAP incorrectly handled Certificate Exact Assertion processing. A remote attacker could possibly use this issue to cause OpenLDAP to crash, resulting in a denial of service. ( CVE-2020-36221 ) It was discovered that OpenLDAP incorrectly handled saslAuthzTo processing. A remote attacker could use this issue to cause OpenLDAP to crash, resulting in a denial of service, or possibly execute arbitrary code. ( CVE-2020-36222 , CVE-2020-36224 , CVE-2020-36225 , CVE-2020-36226 ) It was discovered that OpenLDAP incorrectly handled Return Filter control handling. A remote attacker could use this issue to cause OpenLDAP to crash, resulting in a denial of service, or possibly execute arbitrary code. ( CVE-2020-36223 ) It was discovered that OpenLDAP incorrectly handled certain cancel operations. A remote attacker could possibly use this issue to cause OpenLDAP to crash, resulting in a denial of service. ( CVE-2020-36227 ) It was discovered that OpenLDAP incorrectly handled Certificate List Extract Assertion processing. A remote attacker could possibly use this issue to cause OpenLDAP to crash, resulting in a denial of service. ( CVE-2020-36228 ) It was discovered that OpenLDAP incorrectly handled X.509 DN parsing. A remote attacker could possibly use this issue to cause OpenLDAP to crash, resulting in a denial of service. ( CVE-2020-36229 , CVE-2020-36230 ) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10 o slapd - 2.4.53+dfsg-1ubuntu1.3 Ubuntu 20.04 o slapd - 2.4.49+dfsg-2ubuntu1.6 Ubuntu 18.04 o slapd - 2.4.45+dfsg-1ubuntu1.9 Ubuntu 16.04 o slapd - 2.4.42+dfsg-2ubuntu3.12 In general, a standard system update will make all the necessary changes. References o CVE-2020-36223 o CVE-2020-36226 o CVE-2020-36227 o CVE-2020-36230 o CVE-2020-36221 o CVE-2020-36229 o CVE-2020-36224 o CVE-2020-36225 o CVE-2020-36228 o CVE-2020-36222 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYCIDbuNLKJtyKPYoAQi/Rw/+OVqO6haIUgjFcquBU1pXkWKflGssNUxT L85QdYtdIcWCbixjLslbPH1dWtIjP+cIe7DjssGEKwLh20pBov9GKUSIY4s1SAAA noNeQGHGNBBHfLaYnyFuhJzslZzn5mdggimv6IjTOzZllaoE0QaRmtwa+SYw8ujd PRB2gw1/yeZIwqzcUh6DStK5ZUvqRk/sINcV8u1ErdqJzVjBtViVJv1ABJH3Dm5n oI+THhgkd3ZTbyK/aTUf6ZMrVKk/7cWSYQ7afoiXM3ypxtF3oPYW4CjS2dBdPY8I l28II9Tw7RHMs5SRAMrx6D33IpZmrCRXmYcPxUeIoNUQ+RWrat2Th0ou4WuQvV3b u1pzRQBNKLZuvGGTOma1ui6Sktaju3M6CM/iw/S8ypYJOXv1ELcgEL6XSILKlZGH tJWvWIv/Z72aD6N95wvnwJ/f1+72LAE/r+kyLANTU6o0f6lDnb6QGZG819ABvU/m /DwNRCGKMUDRCS3RZ7xLtr3NJPkdcTUqaipLJh/n10FuvxZ+tNnDOapoltDG1lAP /MRB/NcNcUjcYwfmWpViUIMD3cXNPtLKySTaDmnA77/LK9CjxZistNtENLvOEOjd M7lbGXc0Jl9gfZUOIaJY6oye9mUNmrDyERjdCZsCfI3KIPk0dJeKCyhrMX6AAnBk mcs9rqvcc/M= =Y/MM -----END PGP SIGNATURE-----