Critical Buffer Overflow Vulnerability in CUPS Package
Summary
ALPINE-CVE-2019-8696: A buffer overflow issue was addressed with improved memory handling. Affects cups versions < 2.2.12-r0. Fixed in 2.2.12-r0. 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. This vulnerability affects multiple versions of CUPS across various Alpine Linux releases, making it crucial for users to address it promptly.
Vulnerability Detail
A buffer overflow issue was identified in the CUPS package, stemming from inadequate memory handling. This vulnerability could allow an attacker with privileged network access to execute arbitrary code on the affected system. The potential ramifications include unauthorized access to sensitive data, system compromise, and disruption of services. The vulnerability is classified with a CVSS score of 8.8, indicating a high severity level.
How To Fix
Minimum fixed version
2.2.12-r0
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 measure, users can restrict network access to the CUPS service to mitigate the risk of exploitation until the package is updated. This can be done by configuring firewall rules to limit access to trusted IP addresses only.
Conclusion
The buffer overflow vulnerability in the CUPS package poses a significant risk to systems running affected versions. Users are strongly advised to update to the patched version 2.2.12-r0 or later to mitigate this risk. Implementing temporary workarounds can help reduce exposure until the update is applied.
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FAQ
The CVSS score of this vulnerability is 8.8, indicating a high severity level.
All versions of CUPS prior to 2.2.12-r0 in Alpine Linux are affected by this vulnerability.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
If immediate updating is not possible, consider implementing firewall rules to restrict access to the CUPS service as a temporary workaround.
More information can be found in the CVE details or by visiting the Vulert website, which monitors open-source vulnerabilities.
References
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