CVE-2022-24197: Out-of-bounds Write in iText
Summary
CVE-2022-24197: Out-of-bounds Write in iText. Affects com.itextpdf:itext7-core versions < 7.1.18. Fixed in 7.1.18. How to fix ↓
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Background
The iText library, specifically the com.itextpdf:itext7-core package, is a popular open-source Java library used for creating and manipulating PDF documents. It provides a comprehensive set of functionalities for generating, modifying, and extracting content from PDF files. However, a vulnerability has been discovered in iText version 7.1.17 that allows attackers to trigger a stack-based buffer overflow through the ByteBuffer.append component. This vulnerability can be exploited by crafting a malicious PDF file, potentially leading to a Denial of Service (DoS) attack.
Vulnerability Detail
The vulnerability in iText version 7.1.17 arises from an out-of-bounds write issue in the ByteBuffer.append function. By exploiting this vulnerability, an attacker can cause a stack-based buffer overflow, which can result in a DoS condition. This can be achieved by manipulating certain elements within a crafted PDF file. The severity of this vulnerability is considered moderate, with a CVSS score of 6.5. It is important to note that this vulnerability has been fixed in iText version 7.1.18.
How To Fix
Minimum fixed version
7.1.18
This is the first release that contains the fix.
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Workaround
As a workaround, users can implement input validation and sanitization mechanisms to mitigate the risk of encountering a malicious PDF file. By validating and sanitizing user-supplied PDF files before processing them with iText, it is possible to reduce the likelihood of triggering the vulnerability. However, it is important to note that this workaround may not provide complete protection and upgrading to the fixed version is still recommended.
Conclusion
In conclusion, the iText library version 7.1.17 is vulnerable to an out-of-bounds write issue that can be exploited through a crafted PDF file. This vulnerability can lead to a Denial of Service (DoS) attack. To mitigate this risk, it is crucial to upgrade to iText version 7.1.18 or later. Additionally, implementing input validation and sanitization mechanisms can provide an extra layer of protection. For further assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
iText is an open-source Java library used for creating and manipulating PDF documents. It provides a wide range of functionalities for generating, modifying, and extracting content from PDF files.
This vulnerability allows attackers to trigger a stack-based buffer overflow by crafting a malicious PDF file. This can potentially lead to a Denial of Service (DoS) attack, causing the affected application to become unresponsive or crash.
To fix this vulnerability, it is recommended to upgrade to iText version 7.1.18 or later. This updated version contains the necessary patches to address the vulnerability.
As a workaround, users can implement input validation and sanitization mechanisms to reduce the risk of encountering a malicious PDF file. However, upgrading to the fixed version is still the recommended solution.
Yes, the CVSS score for this vulnerability is 6.5, indicating a moderate severity level.
References
Related vulnerabilities
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