CVE-2012-4968: Silverstripe XSS Vulnerabilities
Summary
CVE-2012-4968: Silverstripe XSS Vulnerabilities. Affects silverstripe/framework across 2 version ranges.
>= 2.3, < 2.3.13
>= 2.4, < 2.4.7
Fixed in 2.3.13 or 2.4.7, depending on the release line you run. How to fix ↓
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Background
SilverStripe is an open-source content management system (CMS) and framework written in PHP. It provides a flexible and powerful platform for building websites and web applications. The SilverStripe framework, specifically versions 2.3.x before 2.3.13 and 2.4.x before 2.4.7, is susceptible to multiple cross-site scripting (XSS) vulnerabilities. These vulnerabilities allow remote attackers to inject arbitrary web script or HTML into various template methods, potentially leading to unauthorized access, data theft, or other malicious activities.
Vulnerability Detail
The XSS vulnerabilities in SilverStripe stem from improper input sanitization in several template methods. Attackers can exploit these vulnerabilities by crafting malicious strings and injecting them into the affected template methods. The impacted template methods include AbsoluteLinks, BigSummary, ContextSummary, EscapeXML, FirstParagraph, FirstSentence, Initial, LimitCharacters, LimitSentences, LimitWordCount, LimitWordCountXML, Lower, LowerCase, NoHTML, Summary, Upper, UpperCase, and URL. These methods accept user-supplied input and fail to properly sanitize it, allowing the injection of malicious code. The vectors for exploitation differ from CVE-2012-0976, another related vulnerability.
How To Fix
Fixed versions by release line
The minimum fixed version depends on the release line you run.
-
>= 2.3, < 2.3.132.3.13composer require silverstripe/framework:2.3.13 -
>= 2.4, < 2.4.72.4.7composer require silverstripe/framework:2.4.7
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Workaround
There is no specific workaround provided for this vulnerability. However, as a general best practice, it is recommended to validate and sanitize all user-supplied input before using it in template methods or any other context where XSS vulnerabilities may arise. Implementing proper input validation and output encoding can help mitigate the risk of XSS attacks.
Conclusion
The XSS vulnerabilities in SilverStripe versions 2.3.x and 2.4.x can allow remote attackers to inject malicious scripts or HTML into web pages. To mitigate this risk, it is essential to upgrade to the fixed versions (2.3.13 or later for 2.3.x and 2.4.7 or later for 2.4.x). Additionally, implementing proper input validation and output encoding practices can help prevent XSS attacks. For further assistance and support in addressing this vulnerability, please contact DevNack.com.
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FAQ
Cross-site scripting (XSS) is a type of security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. These scripts can be used to steal sensitive information, perform unauthorized actions, or deface websites.
The SilverStripe XSS vulnerabilities can be exploited by crafting malicious strings and injecting them into the affected template methods. Attackers can use various vectors, such as user input fields or crafted URLs, to inject the malicious code.
The potential consequences of the SilverStripe XSS vulnerabilities include unauthorized access to sensitive information, data theft, session hijacking, defacement of websites, and the execution of arbitrary code on the victim's browser.
There is no specific information available regarding known instances of these vulnerabilities being exploited in the wild. However, it is always recommended to apply security patches and updates promptly to mitigate the risk of exploitation.
To ensure the security of your SilverStripe-based applications, it is crucial to keep the framework and all associated modules up to date. Regularly check for security advisories and apply patches promptly. Implement secure coding practices, such as input validation and output encoding, to mitigate the risk of common vulnerabilities like XSS.
References
Related vulnerabilities
Recent vulnerabilities recorded for silverstripe/framework.
