CUPS - Buffer Overflow in Compressed Raster File Parsing
Summary
DSA-3172-1: cups - security update. Affects cups versions < 1.5.3-5+deb7u5. Fixed in 1.5.3-5+deb7u5. How to fix ↓
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Background
CUPS (Common UNIX Printing System) is a printing system that allows computers to act as print servers, providing printing services to other computers on a network. It is widely used in Unix-like operating systems. CUPS supports various file formats, including compressed raster files. These files contain image data that can be printed. However, a vulnerability has been discovered in CUPS that allows a remote attacker to trigger a buffer overflow by submitting a specially crafted compressed raster file.
Vulnerability Detail
The vulnerability in CUPS arises from a failure to correctly parse compressed raster files. By exploiting this flaw, a remote attacker can trigger a buffer overflow. This can lead to arbitrary code execution or a denial of service condition. The attacker can achieve this by submitting a specially crafted compressed raster file to a vulnerable CUPS installation. The buffer overflow occurs during the parsing of the file, allowing the attacker to overwrite adjacent memory and potentially execute malicious code.
How To Fix
Minimum fixed version
1.5.3-5+deb7u5
This is the first release that contains the fix.
sudo apt-get install --only-upgrade cupsTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no specific workaround mentioned in the vulnerability details. However, users can consider implementing additional security measures such as restricting access to the CUPS service from untrusted networks or applying network-level protections to mitigate the risk of remote exploitation.
Conclusion
The vulnerability in CUPS that allows a buffer overflow in compressed raster file parsing can be mitigated by upgrading the CUPS package to the fixed version. Users should ensure they are running the appropriate fixed version to protect their systems from potential exploitation. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
CUPS (Common UNIX Printing System) is a printing system used in Unix-like operating systems to provide printing services.
A compressed raster file is a file format that contains image data in a compressed form, suitable for printing.
The vulnerability in CUPS occurs due to a failure to correctly parse compressed raster files, leading to a buffer overflow.
By exploiting this vulnerability, a remote attacker can trigger a buffer overflow, potentially leading to arbitrary code execution or a denial of service condition.
To fix this vulnerability, it is recommended to upgrade the CUPS package to a fixed version as mentioned in the 'how_to_fix' section.
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