Use-after-free vulnerability in libical
Summary
DLA-959-1: libical - security update. Affects libical versions < 0.48-2+deb7u1. Fixed in 0.48-2+deb7u1. How to fix ↓
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Background
libical is an iCalendar library used for parsing, generating, and manipulating iCalendar data. It provides functionality for working with calendar events, tasks, and other calendar-related information. The library is commonly used in applications that handle calendar data, such as email clients and calendar applications. However, a use-after-free vulnerability has been discovered in libical, which could allow remote attackers to cause a denial of service and potentially read heap memory by exploiting a specially crafted .ICS file.
Vulnerability Detail
The use-after-free vulnerability in libical occurs when the library attempts to access memory that has already been freed. This can lead to a crash or potentially allow an attacker to read sensitive information from the heap. By crafting a malicious .ICS file, an attacker can trigger this vulnerability and cause the application using libical to crash or disclose sensitive information. This vulnerability poses a significant risk to applications that handle calendar data and rely on libical for parsing and manipulating iCalendar files.
How To Fix
Minimum fixed version
0.48-2+deb7u1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade libicalTip — 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 necessary to apply the patch provided in the updated libical package to mitigate the risk.
Conclusion
The use-after-free vulnerability in libical can be exploited by remote attackers to cause a denial of service and potentially read heap memory. It is crucial for users to upgrade their libical packages to the fixed version to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for libical →
FAQ
libical is an iCalendar library used for parsing, generating, and manipulating iCalendar data. It is commonly used in applications that handle calendar information.
A use-after-free vulnerability occurs when a program attempts to access memory that has already been freed. This can lead to crashes or potentially allow attackers to read sensitive information.
This vulnerability can be exploited by crafting a specially crafted .ICS file and tricking an application using libical to process it. The attacker can then cause the application to crash or potentially read sensitive information.
The impact of this vulnerability can vary depending on the application using libical. In some cases, it can lead to a denial of service, crashing the application. In more severe cases, it may allow attackers to read sensitive information from the heap.
To protect your application, it is recommended to upgrade the libical package to the fixed version (0.48-2+deb7u1 or later). Additionally, it is good practice to validate and sanitize any user-supplied calendar data before processing it with libical.
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