CVE-2020-36221

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

An integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exact Assertion processing, resulting in denial of service (schema_init.c serialNumberAndIssuerCheck).

Se detectó un subdesbordamiento de enteros en OpenLDAP versiones anteriores a 2.4.57, conllevando bloqueos de slapd en el procesamiento de Certificate Exact Assertion, resultando en una denegación de servicio (serialNumberAndIssuerCheck de schema_init.c)

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
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-191: Integer Underflow (Wrap or Wraparound)

CAPEC

References (16)

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/38ac838e4150c626bbfa0082b7e2cf3a2bb4df31	2023-11-07
https://git.openldap.org/openldap/openldap/-/commit/58c1748e81c843c5b6e61648d2a4d1d82b47e842	2023-11-07

URL	Date	SRC
https://bugs.openldap.org/show_bug.cgi?id=9404	2023-11-07
https://bugs.openldap.org/show_bug.cgi?id=9424	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"		Mac Os X Search vendor "Apple" for product "Mac Os X"				>= 10.14.0 < 10.14.6 Search vendor "Apple" for product "Mac Os X" and version " >= 10.14.0 < 10.14.6"		-		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		-		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2019-004		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2019-005		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2019-006		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2019-007		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2020-001		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2020-002		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2020-003		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2020-004		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2020-005		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2020-006		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2020-007		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2021-001		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2021-002		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		security_update_2021-003		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		supplemental_update		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				10.14.6 Search vendor "Apple" for product "Mac Os X" and version "10.14.6"		supplemental_update_2		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