Integer Overflow or Wraparound Affecting ImageMagick/ImageMagick package, versions [,6.9.10-69)[7.0.0-0,7.0.9)
Threat Intelligence
Exploit maturity not defined.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-IMAGEMAGICKIMAGEMAGICK-3007937
- published26 Jan 2022
- disclosed4 Dec 2020
- creditUnknown
Introduced: 4 Dec 2020
CVE-2020-27771 (opens in a new tab)How to fix?
Upgrade ImageMagick/ImageMagick to version 6.9.10-69, 7.0.9 or higher.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound. In RestoreMSCWarning() of /coders/pdf.c there are several areas where calls to GetPixelIndex() could result in values outside the range of representable for the unsigned char type. The patch casts the return value of GetPixelIndex() to ssize_t type to avoid this bug. This undefined behavior could be triggered when ImageMagick processes a crafted pdf file. Red Hat Product Security marked this as Low severity because although it could potentially lead to an impact to application availability, no specific impact was demonstrated in this case. This flaw affects ImageMagick versions prior to 7.0.9-0.