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CVE-2019-13565

Published: 26 July 2019

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
openldap
Launchpad, Ubuntu, Debian
bionic
Released (2.4.45+dfsg-1ubuntu1.3)
disco
Released (2.4.47+dfsg-3ubuntu2.1)
trusty
Released (2.4.31-1+nmu2ubuntu8.5+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (2.4.48+dfsg-1)
xenial
Released (2.4.42+dfsg-2ubuntu3.6)
Patches:
upstream: http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commit;h=744a46a1acb93798f4e027290191d6a11dd4c18c

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N