漏洞信息
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Vulnerability Title
libheif: Heap Buffer OOB Read in overlay compositing due to wrong alpha stride
Vulnerability Description
libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and prior contain a heap buffer over-read in HeifPixelImage::overlay() in libheif/pixelimage.cc. When compositing an overlay image (iovl) whose child image has a different bit depth for the alpha channel than for the color channels, the function indexes into the alpha plane using the color channel stride (in_stride) instead of the previously retrieved alpha_stride, causing reads past the end of the alpha buffer (up to 3,123 bytes for a 100×50 image with 10-bit color and 8-bit alpha). A crafted HEIF file can exploit this to cause a denial of service (crash) or potentially disclose adjacent heap memory through leaked bytes embedded in the decoded output pixels. This issue has been fixed in versionThis issue has been fixed in version 1.22.0.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Vulnerability Type
跨界内存读
Vulnerability Title
libheif 缓冲区错误漏洞
Vulnerability Description
libheif是struktur开源的一款 ISO/IEC 23008-12:2017 HEIF 文件格式解码器和编码器。 libheif 1.21.2及之前版本存在缓冲区错误漏洞,该漏洞源于HeifPixelImage::overlay()中堆缓冲区过度读取,使用错误步长索引Alpha平面,导致读取超出缓冲区末尾。
CVSS Information
N/A
Vulnerability Type
N/A