Apache HTTP Server up to 2.4.51 Proxy null pointer dereference

Summaryinfo

A vulnerability was found in Apache HTTP Server up to 2.4.51. It has been rated as problematic. The affected element is an unknown function of the component Proxy Handler. This manipulation causes null pointer dereference. This vulnerability is registered as CVE-2021-44224. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Apache HTTP Server up to 2.4.51 (Web Server). It has been declared as problematic. Affected by this vulnerability is an unknown function of the component Proxy Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability.

The weakness was published 12/20/2021. It is possible to read the advisory at httpd.apache.org. This vulnerability is known as CVE-2021-44224 since 11/25/2021. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 276163 (TencentOS Server 3: mod_http2 (TSSA-2022:0259)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.4.52 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (276163) and CERT Bund (WID-SEC-2022-0727). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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

• Web Server

Vendor

• Apache

Name

• HTTP Server

Version

• 2.4.0
• 2.4.1
• 2.4.2
• 2.4.3
• 2.4.4
• 2.4.5
• 2.4.6
• 2.4.7
• 2.4.8
• 2.4.9
• 2.4.10
• 2.4.11
• 2.4.12
• 2.4.13
• 2.4.14
• 2.4.15
• 2.4.16
• 2.4.17
• 2.4.18
• 2.4.19
• 2.4.20
• 2.4.21
• 2.4.22
• 2.4.23
• 2.4.24
• 2.4.25
• 2.4.26
• 2.4.27
• 2.4.28
• 2.4.29
• 2.4.30
• 2.4.31
• 2.4.32
• 2.4.33
• 2.4.34
• 2.4.35
• 2.4.36
• 2.4.37
• 2.4.38
• 2.4.39
• 2.4.40
• 2.4.41
• 2.4.42
• 2.4.43
• 2.4.44
• 2.4.45
• 2.4.46
• 2.4.47
• 2.4.48
• 2.4.49
• 2.4.50
• 2.4.51

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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