Buffer Overflow Vulnerability in CUPS Package - CVE-2019-8842
Summary
ALPINE-CVE-2019-8842: A buffer overflow was addressed with improved bounds checking. Affects cups versions < 2.2.12-r1. Fixed in 2.2.12-r1. How to fix ↓
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Background
CUPS (Common Unix Printing System) is an open-source printing system for Unix-like operating systems that allows a computer to act as a print server. It provides a standard printing interface and supports various printing protocols. The CUPS package is widely used in many Linux distributions, including Alpine Linux. However, it has been identified to have a buffer overflow vulnerability, which could allow remote attackers to exploit certain configurations.
Vulnerability Detail
The vulnerability, identified as CVE-2019-8842, arises from inadequate bounds checking in the CUPS package. This flaw can lead to a buffer overflow, allowing a remote attacker to submit arbitrary print jobs under specific configurations. The potential ramifications include unauthorized access to system resources and the ability to execute arbitrary code, which could compromise the integrity and confidentiality of the affected system.
How To Fix
Minimum fixed version
2.2.12-r1
This is the first release that contains the fix.
sudo apk add --upgrade cupsTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can restrict access to the CUPS service by configuring firewall rules to limit incoming connections or disabling the CUPS service until the package is updated.
Conclusion
CVE-2019-8842 is a significant vulnerability in the CUPS package that poses risks of unauthorized access and code execution. Users are strongly advised to update their CUPS installations to the patched versions to mitigate these risks. Temporary workarounds can be employed until updates are applied.
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FAQ
CVE-2019-8842 is a buffer overflow vulnerability in the CUPS package that could allow remote attackers to submit arbitrary print jobs.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
As a temporary measure, consider restricting access to the CUPS service or disabling it until you can apply the necessary updates.
The vulnerability can lead to unauthorized access and execution of arbitrary code, which may compromise system integrity and confidentiality.
The CVSS score for CVE-2019-8842 is 3.3, indicating a moderate severity level.
References
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