Denial of Service Vulnerability in TIFF Package: CVE-2017-7595
Summary
ALPINE-CVE-2017-7595: The JPEGSetupEncode function in tiff_jpeg.c in LibTIFF 4.0.7 allows remote attackers to cause a denial of service (divide-by-zero error and application crash) via a crafted image. Affects tiff versions < 4.0.7-r2. Fixed in 4.0.7-r2. How to fix ↓
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Background
The TIFF package is a widely used library for handling TIFF (Tagged Image File Format) images. It provides functionalities for reading and writing TIFF files, which are commonly used in various applications, including digital imaging and printing. The library is known for its versatility and support for multiple compression formats. However, it has been found to be vulnerable to a specific issue that can lead to application crashes when processing crafted images.
Vulnerability Detail
The vulnerability, identified as CVE-2017-7595, originates from the JPEGSetupEncode function in the tiff_jpeg.c file of LibTIFF version 4.0.7. This flaw allows remote attackers to exploit the library by sending specially crafted images, resulting in a divide-by-zero error that causes a denial of service (DoS) condition. The ramifications of this vulnerability include application crashes and potential disruption of services that rely on the TIFF library for image processing. The CVSS score for this vulnerability is 5.5, indicating a moderate level of severity.
How To Fix
Minimum fixed version
4.0.7-r2
This is the first release that contains the fix.
sudo apk add --upgrade tiffTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not feasible, a temporary workaround is to avoid processing untrusted or potentially malicious TIFF images until the package is updated. Additionally, implementing input validation to check the integrity of TIFF files before processing can help mitigate the risk.
Conclusion
The CVE-2017-7595 vulnerability in the TIFF package poses a significant risk of denial of service through crafted images. It is crucial for users to update to the patched version 4.0.7-r2 to protect their applications from potential exploitation. Regular monitoring for vulnerabilities using tools like Vulert can help maintain software security.
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FAQ
CVE-2017-7595 is a vulnerability in the TIFF package that allows remote attackers to cause a denial of service by exploiting a divide-by-zero error in the JPEGSetupEncode function.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The primary impact is a denial of service, which can lead to application crashes and service disruptions when processing crafted TIFF images.
Yes, the patched version of the TIFF package is 4.0.7-r2. Updating to this version will resolve the vulnerability.
If you cannot update the package, avoid processing untrusted TIFF images and consider implementing input validation to mitigate risks.
References
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