CVE-2020-36227

Apple Security Advisory 2021-05-25-4

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A flaw was discovered in OpenLDAP before 2.4.57 leading to an infinite loop in slapd with the cancel_extop Cancel operation, resulting in denial of service.

Se detectó un fallo en OpenLDAP versiones anteriores a 2.4.57, conllevando a un bucle infinito en slapd con la operación Cancel de cancel_extop, resultando en una denegación de servicio

It was discovered that OpenLDAP incorrectly handled Certificate Exact Assertion processing. A remote attacker could possibly use this issue to cause OpenLDAP to crash, resulting in a denial of service. It was discovered that OpenLDAP incorrectly handled saslAuthzTo processing. A remote attacker could use this issue to cause OpenLDAP to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-25 CVE Reserved
2021-01-25 CVE Published
2024-08-04 CVE Updated
2025-04-21 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

CAPEC

References (14)

URL	Tag	Source
http://seclists.org/fulldisclosure/2021/May/64	Mailing List
http://seclists.org/fulldisclosure/2021/May/65	Mailing List
http://seclists.org/fulldisclosure/2021/May/70	Mailing List
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E	Mailing List
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E	Mailing List
https://lists.debian.org/debian-lts-announce/2021/02/msg00005.html	Mailing List
https://security.netapp.com/advisory/ntap-20210226-0002	Third Party Advisory
https://support.apple.com/kb/HT212529	Third Party Advisory
https://support.apple.com/kb/HT212530	Third Party Advisory
https://support.apple.com/kb/HT212531	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://git.openldap.org/openldap/openldap/-/commit/9d0e8485f3113505743baabf1167e01e4558ccf5	2023-11-07

URL	Date	SRC
https://bugs.openldap.org/show_bug.cgi?id=9428	2023-11-07
https://git.openldap.org/openldap/openldap/-/tags/OPENLDAP_REL_ENG_2_4_57	2023-11-07
https://www.debian.org/security/2021/dsa-4845	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openldap Search vendor "Openldap"		Openldap Search vendor "Openldap" for product "Openldap"				< 2.4.57 Search vendor "Openldap" for product "Openldap" and version " < 2.4.57"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Apple Search vendor "Apple"		Macos Search vendor "Apple" for product "Macos"				>= 11.1 < 11.4 Search vendor "Apple" for product "Macos" and version " >= 11.1 < 11.4"		-		Affected