Critical Use-After-Free Vulnerability in Bitlbee Package Leading to Potential Remote Code Execution
Summary
CVE-2016-10188: Use-after-free vulnerability in bitlbee-libpurple before 3.5 allows remote servers to cause a denial of service (crash) or possibly execute arbitrary code by causing a file transfer connection to expire. Affects bitlbee versions < 3.5-1. Fixed in 3.5-1. How to fix ↓
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Background
Bitlbee is an open-source instant messaging server that allows users to connect to various chat networks through a single interface. It is widely used for its ability to integrate multiple messaging protocols, making it a versatile tool for communication. However, a critical vulnerability has been identified in versions prior to 3.5, which could compromise the security and stability of systems running this software.
Vulnerability Detail
The vulnerability, identified as CVE-2016-10188, is a use-after-free issue in the bitlbee-libpurple component of Bitlbee. This flaw allows remote servers to exploit the software by causing a file transfer connection to expire, leading to a denial of service (crash) or potentially enabling the execution of arbitrary code. The vulnerability arises from improper memory management, where the software continues to reference memory that has already been freed, creating an opportunity for attackers to manipulate the program's execution flow.
How To Fix
Minimum fixed version
3.5-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade bitlbeeTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If an immediate upgrade is not possible, users can mitigate the risk by disabling file transfer features in Bitlbee until the software can be updated. This can be done by modifying the configuration settings to prevent file transfers.
Conclusion
The CVE-2016-10188 vulnerability in the Bitlbee package poses a significant risk to users, allowing for potential remote code execution and system crashes. It is crucial for users to upgrade to version 3.5 or later to mitigate these risks. For those unable to upgrade immediately, disabling file transfer features can serve as a temporary measure.
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FAQ
CVE-2016-10188 is a use-after-free vulnerability in the Bitlbee package that can lead to denial of service or remote code execution.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Exploitation of this vulnerability can result in application crashes or unauthorized code execution, potentially compromising the entire system.
Yes, you can disable file transfer features in Bitlbee as a temporary workaround until you can upgrade to a secure version.
The CVSS score for CVE-2016-10188 is 9.8, indicating a critical level of severity.
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