Denial-of-Service Attack in libgd2
Summary
DLA-1248-1: libgd2 - security update. Affects libgd2 versions < 2.0.36~rc1~dfsg-6.1+deb7u11. Fixed in 2.0.36~rc1~dfsg-6.1+deb7u11. How to fix ↓
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Background
libgd2 is an image library used for manipulating images. It provides functions to create, modify, and save images in various formats. The library is widely used in applications that require image processing capabilities. However, a vulnerability has been discovered in libgd2 that could be exploited to launch a denial-of-service attack. This vulnerability arises from a signedness confusion issue when processing corrupt image files, leading to an infinite loop.
Vulnerability Detail
The vulnerability in libgd2 allows an attacker to cause a denial-of-service condition by providing a specially crafted image file. When the library attempts to process the corrupt file, it encounters a signedness confusion, which triggers an infinite loop. This loop consumes excessive CPU resources and may cause the affected application to become unresponsive or crash. This vulnerability can be exploited remotely by an attacker who can trick a user or application into opening a malicious image file.
How To Fix
Minimum fixed version
2.0.36~rc1~dfsg-6.1+deb7u11
This is the first release that contains the fix.
sudo apt-get install --only-upgrade libgd2Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to apply the provided fix by upgrading the libgd2 package to the patched version.
Conclusion
The libgd2 image library is vulnerable to a denial-of-service attack due to a signedness confusion issue. To mitigate this vulnerability, it is recommended to upgrade the libgd2 package to version 2.0.36~rc1~dfsg-6.1+deb7u11 or later. No known workaround exists for this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for libgd2 →
FAQ
libgd2 is an image library used for manipulating images in various formats. It provides functions for creating, modifying, and saving images.
This vulnerability allows an attacker to launch a denial-of-service attack by providing a specially crafted image file. It can cause the affected application to become unresponsive or crash.
Yes, this vulnerability can be exploited remotely by tricking a user or application into opening a malicious image file.
No, there is no known workaround for this vulnerability. It is crucial to upgrade the libgd2 package to the patched version.
You can obtain the fixed version of libgd2 from the official Debian repository or through package management tools.
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