libvips is vulnerable to Buffer Over-Read in poppler-based pdfload

Vulnerability Description

libvips is a demand-driven, horizontally threaded image processing library. For versions 8.17.1 and below, when libvips is compiled with support for PDF input via poppler, the pdfload operation is affected by a buffer read overflow when parsing the header of a crafted PDF with a page that defines a width but not a height. Those using libvips compiled without support for PDF input are unaffected as well as thosewith support for PDF input via PDFium. This issue is fixed in version 8.17.2. A workaround for those affected is to block the VipsForeignLoadPdf operation via vips_operation_block_set, which is available in most language bindings, or to set VIPS_BLOCK_UNTRUSTED environment variable at runtime, which will block all untrusted loaders including PDF input via poppler.

References

• https://github.com/libvips/libvips/security/advisories/GHSA-q8px-4w5q-c2r4
• https://github.com/libvips/libvips/commit/a58bfae9223a5466cc81ba9fe6dfb08233cf17d1
• https://github.com/libvips/libvips/releases/tag/v8.17.2