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CVE-2019-13565

Status Candidate

Overview

An issue was discovered in OpenLDAP 2.x before 2.4.48. When using SASL authentication and session encryption, and relying on the SASL security layers in slapd access controls, it is possible to obtain access that would otherwise be denied via a simple bind for any identity covered in those ACLs. After the first SASL bind is completed, the sasl_ssf value is retained for all new non-SASL connections. Depending on the ACL configuration, this can affect different types of operations (searches, modifications, etc.). In other words, a successful authorization step completed by one user affects the authorization requirement for a different user.

Related Files

Ubuntu Security Notice USN-4078-2
Posted Aug 19, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4078-2 - USN-4078-1 fixed several vulnerabilities in openldap. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. It was discovered that OpenLDAP incorrectly handled rootDN delegation. A database administrator could use this issue to request authorization as an identity from another database, contrary to expectations. Various other issues were also addressed.

tags | advisory, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-13057, CVE-2019-13565
MD5 | 967352482f7f59f3ac6490d52904abaf
Ubuntu Security Notice USN-4078-1
Posted Jul 30, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4078-1 - It was discovered that OpenLDAP incorrectly handled rootDN delegation. A database administrator could use this issue to request authorization as an identity from another database, contrary to expectations. It was discovered that OpenLDAP incorrectly handled SASL authentication and session encryption. After a first SASL bind was completed, it was possible to obtain access by performing simple binds, contrary to expectations. Various other issues were also addressed.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2019-13057, CVE-2019-13565
MD5 | e903923ba31b1a29266b7a0a49672251
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