Apple macOS up to 12.3 Apache out-of-bounds write

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Apple macOS up to 12.3 and classified as problematic. Affected is an unknown function of the component Apache. Performing a manipulation results in an unknown weakness. This vulnerability was named CVE-2021-44790. In addition, an exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Apple macOS up to 12.3 (Operating System). This affects an unknown part of the component Apache. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. The impact remains unknown.

The weakness was presented 05/16/2022 as HT213257 as confirmed advisory (Website). The advisory is shared at support.apple.com. This vulnerability is uniquely identified as CVE-2021-44790. A authentication is necessary for exploitation. Technical details are unknown but a public exploit is available. The advisory points out:

Multiple issues in apache

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k.

Upgrading to version 12.4 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

Multiple issues were addressed by updating apache to version 2.4.53.

The vulnerability is also documented in the databases at Exploit-DB (51193) and CERT Bund (WID-SEC-2022-0727). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

Open Source CentOS
Debian Linux
Amazon Linux 2
IBM Power Hardware Management Console
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
Gentoo Linux
Avaya Aura Communication Manager
Avaya Aura Session Manager
Avaya Aura Application Enablement Services
Avaya Aura System Manager
Avaya Aura Experience Portal
Avaya Web License Manager
Apache HTTP Server

Productinfo

Type

Operating System

Vendor

Apple

Name

macOS

Version

License

commercial

Website

Vendor: https://www.apple.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: macOS 12.4

Timelineinfo

12/10/2021 🔍
05/16/2022 +156 days 🔍
05/16/2022 +0 days 🔍
05/18/2022 +2 days 🔍
01/04/2026 +1327 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT213257
Status: Confirmed

CVE: CVE-2021-44790 (🔍)
GCVE (CVE): GCVE-0-2021-44790
GCVE (VulDB): GCVE-100-200133
CERT Bund: WID-SEC-2022-0727 - Apache HTTP Server: Mehrere Schwachstellen

scip Labs: https://www.scip.ch/en/?labs.20180712

Entryinfo

Created: 05/18/2022 07:12
Updated: 01/04/2026 05:15
Changes: 05/18/2022 07:12 (17), 05/18/2022 07:15 (19), 05/18/2022 07:16 (11), 05/24/2022 14:54 (2), 05/24/2022 14:55 (19), 11/06/2024 02:21 (23), 05/01/2025 20:18 (1), 01/04/2026 05:15 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.