Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') in Apache HTTP Server
Summary
CVE-2022-26377: Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in mod_proxy_ajp of Apache HTTP Server allows an attacker to smuggle requests to the AJP server it forwards requests to. Affects apache2 across 2 version ranges.
< 2.4.54-r0
>= da5873e80d6eee7a0838793bf68f1d0254745fbb, < 5ed6876d88a45356ea39ece729853fc9c9f37e2d
Fixed in 2.4.54-r0. How to fix ↓
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Background
Apache HTTP Server is a widely used open-source web server software that provides a robust and scalable platform for serving web content. It is a critical component in many web applications and is known for its performance, security, and flexibility. However, a vulnerability has been discovered in the mod_proxy_ajp module of Apache HTTP Server, which allows for an inconsistent interpretation of HTTP requests, leading to potential HTTP Request Smuggling attacks.
Vulnerability Detail
The vulnerability, identified as CVE-2022-26377, allows an attacker to smuggle requests to the AJP server that Apache HTTP Server forwards requests to. By exploiting this vulnerability, an attacker can manipulate the HTTP requests in a way that bypasses security measures and potentially leads to unauthorized access, data leakage, or other malicious activities. This vulnerability affects Apache HTTP Server versions 2.4.53 and prior.
How To Fix
Minimum fixed version
2.4.54-r0
This is the first release that contains the fix.
sudo apk add --upgrade apache2Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading Apache HTTP Server is not immediately feasible, a temporary workaround is to disable the affected mod_proxy_ajp module. This can be achieved by modifying the server configuration to exclude the module from the server's modules list. However, it is important to note that disabling the module may impact the functionality of certain applications or services that rely on it.
Conclusion
Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') is a critical vulnerability in Apache HTTP Server that can be exploited to bypass security measures and potentially lead to unauthorized access or data leakage. It is crucial to upgrade to the latest version of Apache HTTP Server (2.4.54 or later) to mitigate the risk associated with this vulnerability. If immediate upgrade is not possible, disabling the mod_proxy_ajp module can serve as a temporary workaround. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
Apache HTTP Server is an open-source web server software that provides a platform for serving web content.
mod_proxy_ajp is a module in Apache HTTP Server that enables proxying of requests to an AJP server.
HTTP Request Smuggling is a technique where an attacker manipulates HTTP requests to bypass security measures and potentially gain unauthorized access or perform malicious activities.
This vulnerability can be exploited by sending specially crafted HTTP requests that exploit the inconsistent interpretation of requests by the mod_proxy_ajp module.
Exploiting this vulnerability can lead to unauthorized access, data leakage, or other malicious activities, depending on the attacker's intentions.
References
Related vulnerabilities
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