#VU50391 Double Free in OpenLDAP - CVE-2020-36223
Published: January 26, 2021 / Updated: February 6, 2021
Vulnerability identifier: #VU50391
Vulnerability risk: Medium
CVSSv4.0: 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:Green
CVE-ID: CVE-2020-36223
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
OpenLDAP
OpenLDAP
Software vendor:
OpenLDAP.org
OpenLDAP.org
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error during the Values Return Filter control handling. A remote attacker can send a specially crafted request to the slapd, trigger a double free error and perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.
External links
- https://bugs.openldap.org/show_bug.cgi?id=9408
- https://git.openldap.org/openldap/openldap/-/commit/21981053a1195ae1555e23df4d9ac68d34ede9dd
- https://git.openldap.org/openldap/openldap/-/tags/OPENLDAP_REL_ENG_2_4_57
- https://lists.debian.org/debian-lts-announce/2021/02/msg00005.html
- https://www.debian.org/security/2021/dsa-4845