Debian DLA-1891-1 : openldap security update

high Nessus Plugin ID 127927

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Synopsis

The remote Debian host is missing a security update.

Description

Several security vulnerabilities were discovered in openldap, a server and tools to provide a standalone directory service.

CVE-2019-13057

When the server administrator delegates rootDN (database admin) privileges for certain databases but wants to maintain isolation (e.g., for multi-tenant deployments), slapd does not properly stop a rootDN from requesting authorization as an identity from another database during a SASL bind or with a proxyAuthz (RFC 4370) control.
(It is not a common configuration to deploy a system where the server administrator and a DB administrator enjoy different levels of trust.)

CVE-2019-13565

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.

For Debian 8 'Jessie', these problems have been fixed in version 2.4.40+dfsg-1+deb8u5.

We recommend that you upgrade your openldap packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

Plugin Details

Severity: High

ID: 127927

File Name: debian_DLA-1891.nasl

Version: 1.5

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 8/20/2019

Updated: 5/2/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2019-13565

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:slapd-smbk5pwd, p-cpe:/a:debian:debian_linux:libldap2-dev, p-cpe:/a:debian:debian_linux:slapd-dbg, p-cpe:/a:debian:debian_linux:ldap-utils, cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:libldap-2.4-2-dbg, p-cpe:/a:debian:debian_linux:slapd, p-cpe:/a:debian:debian_linux:libldap-2.4-2

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 8/18/2019

Vulnerability Publication Date: 7/26/2019

Reference Information

CVE: CVE-2019-13057, CVE-2019-13565

Detections

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