漏洞信息
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Vulnerability Title
SumatraPDF: Heap out-of-bounds write in vendored CHMLib LZX Huffman table construction reachable from crafted CHM files
Vulnerability Description
SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, a crafted CHM file can supply malformed LZX Huffman code lengths to make_decode_table in ext/CHMLib/lzx.c. In the long-code branch, the function writes new internal nodes through next_symbol before validating that the canonical Huffman table has overflowed. The PRETREE case can write beyond the 104-entry PRETREE_table into adjacent heap state in struct LZXstate when reached through chm_open, chm_retrieve_object, LZXdecompress, and BUILD_TABLE. This produces heap memory corruption in the parser process, while arbitrary code execution has not been demonstrated. No fixed version is available as of this review.
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Vulnerability Title
sumatrapdfreader sumatrapdf 缓冲区错误漏洞
Vulnerability Description
sumatrapdfreader sumatrapdf是sumatrapdfreader组织开源的一款轻量级的PDF文档查看工具。 sumatrapdfreader sumatrapdf 3.6.1及之前版本存在缓冲区错误漏洞,该漏洞源于对恶意CHM文件中LZX Huffman代码长度的处理不当,可能导致解析进程堆内存损坏。
CVSS Information
N/A
Vulnerability Type
N/A