Cross-Site Scripting Vulnerability in Shaarli Package
Summary
DEBIAN-CVE-2013-7351: Multiple cross-site scripting (XSS) vulnerabilities in index.php in Shaarli allow remote attackers to inject arbitrary web script or HTML via the URL to the (1) showRSS, (2) showATOM, or (3) showDailyRSS function; a (4)... Affects shaarli versions < 0.0.41~beta~dfsg2-4. Fixed in 0.0.41~beta~dfsg2-4. How to fix ↓
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Background
Shaarli is a self-hosted bookmark manager that allows users to save and share links easily. It is designed for simplicity and efficiency, enabling users to organize their bookmarks with tags and descriptions. However, the package has been found to be vulnerable to multiple cross-site scripting (XSS) attacks, which can compromise user data and security.
Vulnerability Detail
The vulnerability arises from improper handling of user input in the index.php file of the Shaarli application. Attackers can exploit this flaw by injecting arbitrary web scripts or HTML through various functions, including showRSS, showATOM, showDailyRSS, and importFile. This can lead to unauthorized actions being performed on behalf of the user, data theft, or redirection to malicious sites.
How To Fix
Minimum fixed version
0.0.41~beta~dfsg2-4
This is the first release that contains the fix.
sudo apt-get install --only-upgrade shaarliTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, you can sanitize user input by implementing input validation and escaping output in the affected functions. This can help mitigate the risk of XSS attacks until the package is updated.
Conclusion
The identified cross-site scripting vulnerability in the Shaarli package poses significant risks to users. It is crucial to update to the latest patched version to ensure the security of your application. Additionally, implementing workarounds can help mitigate risks until an update can be performed.
See every vulnerability recorded for shaarli →
FAQ
The vulnerability is a cross-site scripting (XSS) issue that allows attackers to inject malicious scripts into the Shaarli application.
You can check if your application is affected by using the Vulert playground at Vulert Scanner, which allows you to monitor for open-source vulnerabilities without requiring any installation.
If exploited, this vulnerability can lead to unauthorized access to user accounts, data theft, and the execution of malicious scripts in the context of the user's browser.
Yes, a patched version of the Shaarli package (0.0.41~beta~dfsg2-4) is available. It is recommended to update to this version to mitigate the risk.
If an immediate update is not possible, implement input validation and output escaping as a temporary workaround to reduce the risk of exploitation.
References
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