Apache HTTP Server Vulnerability: Out of Bound Access in Apache2 Versions Prior to 2.4.33
Summary
ALPINE-CVE-2018-1301: A specially crafted request could have crashed the Apache HTTP Server prior to version 2.4.30, due to an out of bound access after a size limit is reached by reading the HTTP header. Affects apache2 versions < 2.4.33-r0. Fixed in 2.4.33-r0. How to fix ↓
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Background
Apache HTTP Server, commonly referred to as Apache, is a widely used open-source web server software that enables the hosting of websites and web applications. It is known for its flexibility, power, and extensive features, making it a popular choice among developers and system administrators. However, certain versions of Apache2 are vulnerable to an out of bound access issue, which can lead to server crashes under specific conditions.
Vulnerability Detail
The vulnerability identified as CVE-2018-1301 allows a specially crafted request to crash the Apache HTTP Server prior to version 2.4.33. This issue arises from an out of bound access that occurs when the server reads the HTTP header and reaches a size limit. Although this vulnerability is considered low risk for common server usage, it poses a potential threat, especially in debug mode where it may be easier to trigger.
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
As a workaround, consider disabling debug mode in your Apache configuration to minimize the risk of triggering this vulnerability. Additionally, ensure that your server is configured to handle requests securely and monitor logs for any unusual activity.
Conclusion
The Apache HTTP Server vulnerability CVE-2018-1301 presents a risk of server crashes due to out of bound access when handling HTTP requests. It is crucial to update to version 2.4.33 or later to mitigate this risk. Users should also consider workarounds and monitor their systems for any suspicious activity.
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FAQ
CVE-2018-1301 is a vulnerability in the Apache HTTP Server that allows an attacker to crash the server through specially crafted requests.
Apache HTTP Server versions prior to 2.4.33 are affected by this vulnerability.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
The CVSS score of this vulnerability is 5.9, indicating a moderate level of risk.
If immediate updating is not possible, consider disabling debug mode and monitoring your server for unusual activity as a temporary measure.
References
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