Critical Vulnerability in Apache2: HTTP Request Smuggling Risk
Summary
ALPINE-CVE-2022-22720: Apache HTTP Server 2.4.52 and earlier fails to close inbound connection when errors are encountered discarding the request body, exposing the server to HTTP Request Smuggling. Affects apache2 versions < 2.4.53-r0. Fixed in 2.4.53-r0. How to fix ↓
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Background
Apache HTTP Server, commonly referred to as Apache2, is a widely used open-source web server software that enables the hosting of websites and web applications. Known for its flexibility, power, and extensive features, Apache2 supports various modules and configurations, making it a popular choice among developers and system administrators. However, versions 2.4.52 and earlier are susceptible to a critical vulnerability that can lead to HTTP Request Smuggling attacks, potentially compromising server integrity and exposing sensitive data.
Vulnerability Detail
The vulnerability, identified as CVE-2022-22720, arises from Apache HTTP Server's failure to properly close inbound connections when errors occur while discarding the request body. This oversight allows attackers to exploit the server by sending crafted requests that can manipulate the server's behavior, leading to unauthorized access or data leakage. The severity of this vulnerability is underscored by its CVSS score of 9.8, indicating a critical risk level that necessitates immediate attention.
How To Fix
Minimum fixed version
2.4.53-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
As a temporary workaround, consider implementing strict input validation and monitoring of incoming requests to mitigate the risk of HTTP Request Smuggling until the package can be updated. Additionally, configuring the server to reject malformed requests can help reduce exposure.
Conclusion
The Apache HTTP Server vulnerability CVE-2022-22720 poses a significant risk to users of versions 2.4.52 and earlier. Immediate action is required to update to the patched version to safeguard against potential HTTP Request Smuggling attacks. Regular monitoring and updates are crucial for maintaining server security.
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FAQ
CVE-2022-22720 is a critical vulnerability in Apache HTTP Server versions 2.4.52 and earlier, which can lead to HTTP Request Smuggling attacks.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The CVSS score for this vulnerability is 9.8, indicating a critical risk level.
Exploitation of this vulnerability can lead to unauthorized access, data leakage, and manipulation of server behavior, posing significant risks to server integrity.
It is recommended to regularly check for updates and apply patches as soon as they are released to mitigate vulnerabilities and enhance security.
References
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