XSS Vulnerability in ownCloud Core Affecting Ruby Packages in Alpine
Summary
ALPINE-CVE-2020-16255: ownCloud (Core) before 10.5 allows XSS in login page 'forgot password.'. Affects ruby versions < 2.5.8-r0. Fixed in 2.5.8-r0. How to fix ↓
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Background
Ruby is a dynamic, open-source programming language with a focus on simplicity and productivity. It is widely used for building web applications and is a core component of many software stacks. The vulnerability in question affects Ruby packages in Alpine Linux versions 3.8 and 3.9, specifically in the context of the ownCloud application, which is a popular self-hosted file sync and share solution.
Vulnerability Detail
The vulnerability identified as CVE-2020-16255 allows for Cross-Site Scripting (XSS) in the login page's 'forgot password' feature of ownCloud (Core) prior to version 10.5. This flaw can be exploited by an attacker to inject malicious scripts into the web application, potentially leading to unauthorized access, data theft, or other malicious activities. The vulnerability arises from insufficient input validation on the affected page, making it susceptible to XSS attacks.
How To Fix
Minimum fixed version
2.5.8-r0
This is the first release that contains the fix.
sudo apk add --upgrade rubyTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can disable the 'forgot password' feature in the ownCloud settings until the package is updated. This can help mitigate the risk of exploitation while waiting for a permanent fix.
Conclusion
The XSS vulnerability in ownCloud Core affecting Ruby packages in Alpine poses significant security risks. It is crucial for users to update their Ruby packages to the patched version and consider disabling vulnerable features until the update is applied. Regular monitoring for vulnerabilities using tools like Vulert can help maintain application security.
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FAQ
CVE-2020-16255 is a vulnerability that allows for Cross-Site Scripting (XSS) in the ownCloud login page's 'forgot password' feature.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
Exploitation of this vulnerability can lead to unauthorized access, data theft, and other malicious activities through injected scripts.
You can update the Ruby package by running the command 'apk add ruby=2.5.8-r0' in your terminal.
Yes, you can temporarily disable the 'forgot password' feature in ownCloud settings to reduce the risk of exploitation.
References
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