SB2019092417 - OpenSUSE Linux update for openldap2

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Main Vulnerability Database SB2019092417

SB2019092417 - OpenSUSE Linux update for openldap2

Published: September 24, 2019

Security Bulletin ID SB2019092417
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Stack-based buffer overflow (CVE-ID: CVE-2017-17740)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to a boundary error шт contrib/slapd-modules/nops/nops.c when both the nops module and the memberof overlay are enabled. A remote unauthenticated attacker can trigger stack-based buffer overflow and cause slapd crash via a member MODDN operation.

2) Improper Authorization (CVE-ID: CVE-2019-13057)

CWE-ID: CWE-285 - Improper Authorization

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to incorrect processing of rootDN delegation in the OpenLDAP multi-tenant deployments. A database administrator could use this issue to request authorization as an identity from another database, contrary to expectations.


3) Improper Authorization (CVE-ID: CVE-2019-13565)

CWE-ID: CWE-285 - Improper Authorization

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to escalate privileges.
The vulnerability exists due to incorrect processing of SASL authentication and session encryption in OpenLDAP. After the first SASL bind is completed, the sasl_ssf value is retained for all new non-SASL connections, allowing to bypass ACLs and obtain access by performing simple binds.

Remediation

Install update from vendor's website.

References