جزئیات آسیب‌پذیری

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Thor Vector Graphics (ThorVG) is a production-ready vector graphics engine. Prior to 1.0.7, the `SFNT/TTF` font loader's `SfntLoader::gen` function in `tvgSfntLoader.cpp` reads `data[0] through data[3]` to identify the font type without first checking that the input buffer contains at least four bytes. Loading an undersized font directly from memory through public APIs such as `tvg::Text::load` causes an out-of-bounds read. Loading through a file path using `mmap` can mask the read because of page alignment; the memory-loading API directly exposes it. Depending on memory layout, a malformed short font may crash the consuming application or disclose adjacent heap memory. This issue is fixed in version 1.0.7.

• https://github.com/thorvg/thorvg/commit/1dc232a33535946b5eed5fd65e993b13226da0ca x_refsource_MISC
• https://github.com/thorvg/thorvg/releases/tag/v1.0.7 x_refsource_MISC
• https://github.com/thorvg/thorvg/security/advisories/GHSA-crfw-c34f-vqrj x_refsource_CONFIRM