CVE-2019-13565

Description

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.

How to fix CVE-2019-13565

To remediate CVE-2019-13565, upgrade the affected package to a fixed version below.

• —upgrade to 2.4.48-r0 or later
• —upgrade to 2.4.48+dfsg-1 or later

Is CVE-2019-13565 being exploited?

Low — EPSS is 4.2%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 2.4.48-r0
• from 0, < 2.4.48+dfsg-1

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2019-13565
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2019-13565