ImageMagick ReadUIImage Buffer Overflow and Logic Vulnerability Analysis

Vulnerability Overview This vulnerability involves multiple security issues in the ImageMagick software, specifically including: 1. Out-of-bounds memory access during image reading: In the function, incorrect comparisons and calculations involving variables of type and can lead to out-of-bounds memory access. 2. Improper file path handling: Logic errors in handling file paths within the function may result in unauthorized file access. 3. Memory allocation and deallocation issues: Logical errors in memory allocation and deallocation within the function may lead to memory leaks or double frees. Impact Scope Affected Versions: Specific versions of ImageMagick (specific version numbers were not explicitly displayed in the screenshot). Affected Functionality: Primarily affects image reading and processing functionality, potentially leading to program crashes, data leaks, or remote code execution. Remediation 1. Fix out-of-bounds memory access: - Correct the comparison and calculation logic for and type variables in the function to prevent out-of-bounds memory access. 2. Improve file path handling: - Enhance the logic for handling file paths in the function to ensure that only authorized files are accessible. 3. Fix memory allocation and deallocation issues: - Correct the logic for memory allocation and deallocation in the function to prevent memory leaks or double frees. POC Code The following is the POC code snippet involved in the screenshot: ```c // Code related to out-of-bounds memory access if ((int) RunCount < 0) { size_t RunCountMasked; if ((int) RunCount < 0) { RunCountMasked = 0; } else { RunCountMasked = (size_t) RunCount; } offset = SeekBlob(image, TellBlob(image), SEEK_SET); if (offset < 0) { ThrowUIReaderException(CorruptImageError, "ImproperImageHeader"); } if (EOFBlob(image) != MagickFalse) { goto CUT_IO; } EncodedByte = (size_t) 1; if (EOFBlob(image) != MagickFalse) { goto CUT_IO; } RunCount = (unsigned char) ReadBlobByte(image); if (EOFBlob(image) != MagickFalse) { goto CUT_IO; } if (EOFBlob(image) != MagickFalse) { goto CUT_IO; } RunCountMasked = RunCount & 0x7F; if (EncodedByte != 1) { goto CUT_IO; } if (EncodedByte != 1) { goto CUT_IO; } i = 0; if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if (i < 0) { goto CUT_IO; } if

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ImageMagick ReadUIImage Buffer Overflow and Logic Vulnerability Analysis

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