Description (CNA)
The GUIX binary resource loader never checks that a font page's glyph range is well formed. `gx_page_header_first_glyph` and `gx_page_header_last_glyph` are read verbatim from the file and only the upper bound of `last_glyph` is validated, so a page declaring `first_glyph > last_glyph` makes `last - first + 1` underflow to a very large unsigned count. That count is multiplied by a glyph record size to reserve the load buffer, and the multiply is unchecked, so it wraps to a small value and the loader allocates a buffer far smaller than the data it is about to write. The load pass then recomputes the count in a narrower type and writes attacker-controlled glyph records into the undersized buffer.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Eclipse Foundation / Eclipse ThreadX - GUIX | affected 0 through 6.5.1.202602a; unaffected 6.5.2.202603 |
CWE
CWE-190, CWE-680, CWE-787
References
ADP enrichment
No English description supplied.
No references supplied.