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Advisories

HarfBuzz 8.0.0 through 14.6.0 Out-of-Bounds Write via WebAssembly font_glyph_to_string

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Severity
high
Date
Affecting

  • harfbuzz >= 8.0.0, <= 14.6.0

CWE
  • CWE-787 Out-of-bounds Write
CVSS
7.3
CVSS V4 Vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
Aziz Elbelaychy (Ostorlab)
Description
HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.

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