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Change History

https://www.kb.cert.org/vuls/id/987105

A heap-buffer-overflow vulnerability exists in the nothings stb TrueType library, up to version 1.26, that is used for parsing TrueType font files. The vulnerability exists in the stbtt__GetGlyphShapeTT() function within the nothings stb_truetype.h library when parsing malformed TTF (TrueType Font) files. The vulnerability resides in the glyph data parsing path.

An attacker can craft a malformed TTF file with an inflated endPtsOfContours value and truncate the remaining glyph data. When an application utilizing stb_truetype.h (such as various game engines or graphics software) attempts to load, bake, or render this malformed font via stbtt_GetGlyphShape(), the parser will attempt to read past the end of the glyph data buffer, triggering the out-of-bounds read.

https://cwe.mitre.org/data/definitions/122.html

https://github.com/nothings/stb

https://github.com/nothings/stb/issues/1905

https://kb.cert.org/vuls/id/987105

[{"vendor":"Sean Barrett (nothings)","product":"nothings stb","versions":[{"version":"1.26","status":"affected"}]}]