漏洞信息
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Vulnerability Title
Imager::File::GIF versions through 1.002 for Perl allow a heap out of bounds (OOB) write on crafted multi-frame GIF files
Vulnerability Description
Imager::File::GIF versions through 1.002 for Perl allow a heap out of bounds (OOB) write on crafted multi-frame GIF files.
Imager::File::GIF's i_readgif_multi_low allocates a single per-row buffer GifRow sized for the GIF's global screen width 'SWidth' and reuses it across every image in the file.
The page-match branch validates Image.Width + Image.Left > SWidth before each DGifGetLine write, but the parallel skip-image branch at imgif.c:790-805 calls DGifGetLine(GifFile, GifRow, Width) with no such check.
CVSS Information
N/A
Vulnerability Type
跨界内存写
Vulnerability Title
Imager::File::GIF 缓冲区错误漏洞
Vulnerability Description
Imager::File::GIF是Tony Cook个人开发者的一个支持GIF图像读取、写入与处理的Perl图像模块。 Imager::File::GIF 1.002及之前版本存在缓冲区错误漏洞,该漏洞源于i_readgif_multi_low函数分配单个每行缓冲区GifRow,其大小基于GIF全局屏幕宽度SWidth并在文件中每个图像间重用,跳过图像分支在调用DGifGetLine时未进行宽度检查,可能导致在特制多帧GIF文件上发生堆越界写入。
CVSS Information
N/A
Vulnerability Type
N/A