Vulnerability in GNOME GLib Package (CVE-2021-27218)
Summary
CVE-2021-27218: An issue was discovered in GNOME GLib before 2.66.7 and 2.67.x before 2.67.4. Affects glib across 3 version ranges.
< 2.66.7-r0
>= 8f0b968cd128915853d17bf7944f7e0ebd90a399, < 4236672170fcf643fd7425fcc74cc8d8340ebd79
< 95115f029d9c170c2e966cd7d3547b6394c92a4a
Fixed in 2.66.7-r0. How to fix ↓
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Background
GNOME GLib is a library that provides various useful functions for C programming language. It is widely used in the GNOME desktop environment and other applications. This vulnerability (CVE-2021-27218) affects versions before 2.66.7 and 2.67.x before 2.67.4. The issue arises when the function g_byte_array_new_take() is called with a buffer of 4GB or more on a 64-bit platform. Due to a truncation error, the length of the buffer is unintentionally truncated modulo 2^32, leading to unintended length truncation.
Vulnerability Detail
The vulnerability in GNOME GLib (CVE-2021-27218) occurs when g_byte_array_new_take() is used with a large buffer on a 64-bit platform. The length of the buffer is incorrectly truncated modulo 2^32, resulting in unintended length truncation. This can lead to various issues, such as data corruption, memory access errors, and potential security vulnerabilities. An attacker may be able to exploit this vulnerability to manipulate the truncated data and cause a denial-of-service (DoS) condition or execute arbitrary code.
How To Fix
Minimum fixed version
2.66.7-r0
This is the first release that contains the fix.
sudo apk add --upgrade glibTip — 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 update the GNOME GLib package to the fixed version to mitigate the risk of exploitation.
Conclusion
The vulnerability in GNOME GLib (CVE-2021-27218) can have serious consequences, including data corruption and potential security risks. It is crucial to update the GNOME GLib package to the fixed version (2.66.7 or later) to mitigate the risk of exploitation. Regularly updating software and applying security patches is essential for maintaining a secure environment. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for glib →
FAQ
GNOME GLib is a library that provides various useful functions for C programming language. It is commonly used in the GNOME desktop environment and other applications.
This vulnerability can lead to data corruption, memory access errors, and potential security vulnerabilities. An attacker may be able to exploit this vulnerability to cause a denial-of-service (DoS) condition or execute arbitrary code.
To fix this vulnerability, update the GNOME GLib package to version 2.66.7 or later. Download the updated package from the official GNOME website or use your package manager to install the latest version.
No, there is no known workaround for this vulnerability. It is crucial to update the GNOME GLib package to the fixed version.
You can find more information about this vulnerability in the CVE-2021-27218 JSON report available at the following source: https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27218.json
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