libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.19.6, Op_RGB24_32_to_YCbCr::convert_colorspace() stores image-plane strides in an integer width that can overflow for extremely large RGB images created through heif_image_create() and heif_image_add_plane(). The resulting wrapped stride causes the conversion loop in libheif/color-conversion/rgb2yuv.cc to compute an invalid input pointer and read beyond the allocated interleaved plane while heif_context_encode_image() performs RGB-to-YCbCr conversion.
This can crash the encoding process. This issue is fixed in version 1.19.6.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 3
https://github.com/strukturag/libheif/commit/e29953da30eb11aa1762df0bff3b36be4b…
security-advisories@github.com
https://github.com/strukturag/libheif/releases/tag/v1.19.6
security-advisories@github.com
https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq
security-advisories@github.com