Critical Heap-Based Buffer Overflow in rdesktop Package
Summary
ALPINE-CVE-2018-8800: rdesktop versions up to and including v1.8.3 contain a Heap-Based Buffer Overflow in function ui_clip_handle_data() that results in a memory corruption and probably even a remote code execution. Affects rdesktop versions < 1.8.6-r0. Fixed in 1.8.6-r0. How to fix ↓
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Background
rdesktop is an open-source client for the Remote Desktop Protocol (RDP), allowing users to connect to Windows desktops and servers. It is widely used for remote access to Windows environments from Unix-like systems. The package is known for its lightweight nature and ease of use, but it has been found to be vulnerable to a serious security flaw that could compromise system integrity.
Vulnerability Detail
The vulnerability identified as CVE-2018-8800 is a Heap-Based Buffer Overflow in the function ui_clip_handle_data() of rdesktop versions up to and including v1.8.3. This flaw can lead to memory corruption, which may allow an attacker to execute arbitrary code remotely. The severity of this vulnerability is rated at a CVSS score of 9.8, indicating a critical risk to systems using affected versions of rdesktop.
How To Fix
Minimum fixed version
1.8.6-r0
This is the first release that contains the fix.
sudo apk add --upgrade rdesktopTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can limit access to the rdesktop service or disable it until the package is updated. Additionally, consider using alternative remote desktop solutions that do not have this vulnerability.
Conclusion
The rdesktop package has a critical vulnerability (CVE-2018-8800) that can lead to severe security risks, including remote code execution. Users are strongly advised to update to version 1.8.6-r0 or later to mitigate these risks. For ongoing monitoring of vulnerabilities, tools like Vulert can be invaluable.
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FAQ
CVE-2018-8800 is a vulnerability in the rdesktop package that allows for a heap-based buffer overflow, potentially leading to remote code execution.
You can check your rdesktop version by running 'rdesktop -version' in the terminal. If it is 1.8.3 or earlier, it is vulnerable.
If immediate updates are not possible, consider restricting access to the rdesktop service or using alternative remote desktop solutions.
Detailed information can be found in the CVE database or through security advisories related to rdesktop.
Vulert monitors open-source vulnerabilities in real-time using a manifest file like package-lock.json, allowing users to stay informed about potential risks without needing to access the code.
References
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