CVE-2019-13565 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.html http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.html http://seclists.org/fulldisclosure/2019/Dec/26 https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0@3Cissues.bookkeeper.apache.org3E https://lists.debian.org/debian-lts-announce/2019/08/msg00024.html https://seclists.org/bugtraq/2019/Dec/23 https://support.apple.com/kb/HT210788 https://support.f5.com/csp/article/K98008862?utm_source=f5support&utm_medium=RSS https://usn.ubuntu.com/4078-1/ https://usn.ubuntu.com/4078-2/ https://www.openldap.org/its/index.cgi/?findid=9052 https://www.openldap.org/lists/openldap-announce/201907/msg00001.html https://www.oracle.com/security-alerts/cpuapr2020.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.5