Apache HTTP Server up to 2.4.52 Inbound Connection request smuggling

Summaryinfo

A vulnerability was found in Apache HTTP Server up to 2.4.52. It has been rated as critical. Impacted is an unknown function of the component Inbound Connection Handler. Performing a manipulation results in request smuggling. This vulnerability is cataloged as CVE-2022-22720. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in Apache HTTP Server up to 2.4.52 (Web Server). This affects an unknown function of the component Inbound Connection Handler. The manipulation with an unknown input leads to a request smuggling vulnerability. CWE is classifying the issue as CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was shared 03/14/2022. It is possible to read the advisory at httpd.apache.org. This vulnerability is uniquely identified as CVE-2022-22720 since 01/06/2022. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/16/2025).

The vulnerability scanner Nessus provides a plugin with the ID 236725 (Alibaba Cloud Linux 3 : 0023: httpd:2.4 (ALINUX3-SA-2022:0023)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.4.53 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (236725). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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
• 2.4.52

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

• 🔍
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CPE 2.2info

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

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