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CVE-2020-27771: Invalid Bug ID
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.
‘1898290?cve=title’ is not a valid bug number nor an alias to a bug.
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Ubuntu Security Notice 7068-1 - It was discovered that ImageMagick incorrectly handled certain malformed image files. If a user or automated system using ImageMagick were tricked into processing a specially crafted file, an attacker could exploit this to cause a denial of service or affect the reliability of the system. The vulnerabilities included memory leaks, buffer overflows, and improper handling of pixel data.