icu - Buffer Overflow and Integer Signedness/Overflow Vulnerabilities
Summary
DLA-545-1: icu - security update. Affects icu versions < 4.8.1.1-12+deb7u4. Fixed in 4.8.1.1-12+deb7u4. How to fix ↓
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Background
ICU (International Components for Unicode) is a C and C++ library that provides robust and full-featured Unicode support. It offers functions for character handling, string manipulation, and text layout, making it an essential component for software that deals with internationalization and localization. However, several security vulnerabilities have been identified in ICU version 4.8.1.1-12+deb7u4 and earlier.
Vulnerability Detail
The identified vulnerabilities in ICU include:
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Buffer Overflow Vulnerability (CVE-2015-2632): This vulnerability allows an attacker to overwrite memory beyond the bounds of a buffer, potentially leading to arbitrary code execution or a denial of service.
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Buffer Overflow Vulnerability (CVE-2015-4844): Similar to the previous vulnerability, this allows an attacker to overwrite memory beyond the bounds of a buffer, potentially leading to arbitrary code execution or a denial of service.
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Integer Signedness/Overflow Vulnerability (CVE-2016-0494): This vulnerability arises from incorrect handling of signedness and integer overflow, which can result in unexpected behavior or security issues.
These vulnerabilities pose a significant risk to systems using ICU, as they can be exploited by malicious actors to gain unauthorized access, execute arbitrary code, or disrupt the normal functioning of the software.
How To Fix
Minimum fixed version
4.8.1.1-12+deb7u4
This is the first release that contains the fix.
sudo apt-get install --only-upgrade icuTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Conclusion
Upgrading the icu package to version 4.8.1.1-12+deb7u4 or later is crucial to mitigate the buffer overflow and integer signedness/overflow vulnerabilities in ICU. By doing so, you can ensure the security and stability of your system. If you need further assistance or have any questions, please contact DevNack.com.
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FAQ
ICU (International Components for Unicode) is a C and C++ library that provides robust and full-featured Unicode support. It offers functions for character handling, string manipulation, and text layout, making it an essential component for software that deals with internationalization and localization.
These vulnerabilities can allow attackers to execute arbitrary code, gain unauthorized access, or disrupt the normal functioning of the software. This can lead to data breaches, system compromise, or denial of service.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by these vulnerabilities. Simply upload your package manifest file (e.g., package-lock.json) to the playground, and it will analyze the dependencies and alert you if any vulnerabilities are found.
At the moment, there are no known workarounds for these vulnerabilities. It is recommended to upgrade the icu package to the fixed version as soon as possible.
You can find more information about Debian LTS security advisories, including how to apply updates and frequently asked questions, on the Debian LTS wiki: https://wiki.debian.org/LTS
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