Heap-Based Buffer Overflow in libexif: CVE-2009-3895 Vulnerability
Summary
ALPINE-CVE-2009-3895: Heap-based buffer overflow in the exif_entry_fix function (aka the tag fixup routine) in libexif/exif-entry.c in libexif 0.6.18 allows remote attackers to cause a denial of service or possibly execute arbitrary code via... Affects libexif versions < 0.6.19-r0. Fixed in 0.6.19-r0. How to fix ↓
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Background
libexif is a library used for reading and writing EXIF (Exchangeable Image File Format) metadata in image files. It is widely utilized in applications that handle image processing, allowing them to extract and manipulate metadata embedded in images. The library is essential for ensuring that image-related applications can correctly interpret and manage metadata, which is crucial for functionalities like image organization and editing. However, libexif versions prior to 0.6.19-r0 are vulnerable to a heap-based buffer overflow, which can lead to severe security issues.
Vulnerability Detail
The vulnerability identified as CVE-2009-3895 is a heap-based buffer overflow found in the exif_entry_fix function within libexif's exif-entry.c file. This flaw allows remote attackers to exploit the library by providing an invalid EXIF image, potentially leading to a denial of service or arbitrary code execution. The issue arises from improper handling of EXIF data, which can be manipulated to overflow the buffer, compromising the application's stability and security.
How To Fix
Minimum fixed version
0.6.19-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 untrusted or malformed EXIF images until the library is updated. Implement input validation to check the integrity of EXIF data before processing it.
Conclusion
The CVE-2009-3895 vulnerability in libexif poses serious security risks due to a heap-based buffer overflow. Users are advised to update to the patched version to mitigate these risks. For those unable to update immediately, implementing workarounds and monitoring with tools like Vulert can help manage exposure to this vulnerability.
See every vulnerability recorded for libexif →
FAQ
CVE-2009-3895 is a vulnerability in the libexif library that allows for a heap-based buffer overflow, potentially leading to denial of service or arbitrary code execution.
All versions of libexif prior to 0.6.19-r0 are affected by this vulnerability.
You can use Vulert, which monitors open-source vulnerabilities in your software using a manifest file like package-lock.json. Visit Vulert Scanner to check your application without any signup.
If an immediate update is not possible, refrain from processing untrusted EXIF images and implement input validation to mitigate risks.
Exploiting this vulnerability can lead to application crashes, unauthorized access, and execution of malicious code, posing significant security risks.
References
Related vulnerabilities
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