Apache HTTP Server Session Header Vulnerability in apache2 Package - CVE-2018-1283
Summary
ALPINE-CVE-2018-1283: In Apache httpd 2.4.0 to 2.4.29, when mod_session is configured to forward its session data to CGI applications (SessionEnv on, not the default), a remote user may influence their content by using a "Session" header. Affects apache2 versions < 2.4.33-r0. Fixed in 2.4.33-r0. How to fix ↓
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Background
The apache2 package is an open-source web server software that enables users to serve web content over the internet. It is widely used due to its flexibility, performance, and extensive features. However, certain configurations can expose it to vulnerabilities, such as CVE-2018-1283, which affects versions 2.4.0 to 2.4.29 when mod_session is improperly configured.
Vulnerability Detail
CVE-2018-1283 is a vulnerability in Apache HTTP Server where mod_session, when configured to forward session data to CGI applications, allows remote users to influence content through a crafted 'Session' header. This occurs because the 'HTTP_SESSION' variable name used by mod_session conflicts with the 'HTTP_' prefix used by Apache to pass HTTP header fields. The potential ramifications include unauthorized access to sensitive information and manipulation of web application behavior.
How To Fix
Minimum fixed version
2.4.33-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 immediate patching is not feasible, consider disabling mod_session or configuring it not to forward session data to CGI applications. This can be done by setting 'SessionEnv off' in your Apache configuration file.
Conclusion
CVE-2018-1283 is a significant vulnerability in the apache2 package that can lead to unauthorized access and manipulation of web applications. It is crucial to update to the patched version or implement workarounds to mitigate the risk. Regular monitoring and vulnerability management practices, such as using Vulert, can help maintain the security of your applications.
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FAQ
CVE-2018-1283 is a vulnerability in Apache HTTP Server that allows remote users to influence content through a crafted 'Session' header when mod_session is improperly configured.
The vulnerability affects apache2 versions from 2.4.0 to 2.4.29.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without requiring any signup.
The CVSS score for CVE-2018-1283 is 5.3, indicating a moderate severity level.
If you cannot update the package, consider disabling mod_session or configuring it to not forward session data to CGI applications as a temporary workaround.
References
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