Buffer Overflow Vulnerability in libexif: Denial of Service Risk
Summary
ALPINE-CVE-2012-2814: Buffer overflow in the exif_entry_format_value function in exif-entry.c in the EXIF Tag Parsing Library (aka libexif) 0.6.20 allows remote attackers to cause a denial of service or possibly execute arbitrary code via cra... Affects libexif versions < 0.6.21-r0. Fixed in 0.6.21-r0. How to fix ↓
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Background
libexif is an open-source library used for parsing EXIF tags in image files. It is widely utilized in applications that handle image metadata, allowing developers to extract and manipulate information such as camera settings, date taken, and more. The library is essential for applications that require accurate image data processing. However, a vulnerability has been identified in versions prior to 0.6.21-r0, which exposes users to potential security risks.
Vulnerability Detail
The vulnerability, identified as CVE-2012-2814, is a buffer overflow in the exif_entry_format_value function within the exif-entry.c file of libexif version 0.6.20. This flaw allows remote attackers to craft malicious EXIF tags in images, leading to denial of service or potentially executing arbitrary code on the affected system. The vulnerability arises from improper handling of input data, which can overflow the buffer and corrupt memory, posing significant security risks.
How To Fix
Minimum fixed version
0.6.21-r0
This is the first release that contains the fix.
sudo apk add --upgrade libexifTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, avoid processing images with untrusted or unknown EXIF data until the package is updated. Additionally, consider implementing input validation to check the integrity of EXIF tags before processing them.
Conclusion
The buffer overflow vulnerability in libexif (CVE-2012-2814) poses significant risks to applications that process image metadata. It is crucial to update to the patched version (0.6.21-r0) to mitigate these risks. Users should also consider implementing workarounds until the update is applied.
See every vulnerability recorded for libexif →
FAQ
CVE-2012-2814 is a security vulnerability in the libexif library that allows for buffer overflow attacks via crafted EXIF tags.
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The risks include denial of service and the potential for remote code execution, which can compromise the security of the affected system.
You can update libexif by running the command 'apk add libexif@0.6.21-r0' in your terminal, ensuring you have the correct repository configured.
Yes, avoid processing images with untrusted EXIF data and implement input validation to check the integrity of EXIF tags.
References
Related vulnerabilities
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