#VU50390 Reachable Assertion in OpenLDAP - CVE-2020-36222
Published: January 26, 2021 / Updated: February 6, 2021
Vulnerability identifier: #VU50390
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-2020-36222
CWE-ID: CWE-617
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 reachable assertion in slapd in the saslAuthzTo validation. A remote attacker can send a specially crafted request 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=9406
- https://bugs.openldap.org/show_bug.cgi?id=9407
- https://git.openldap.org/openldap/openldap/-/commit/02dfc32d658fadc25e4040f78e36592f6e1e1ca0
- https://git.openldap.org/openldap/openldap/-/commit/6ed057b5b728b50746c869bcc9c1f85d0bbbf6ed
- https://git.openldap.org/openldap/openldap/-/commit/6ed057b5b728b50746c869bcc9c1f85d0bbbf6ed.aa
- 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