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Advisories

wlroots before 0.20.2 Out-of-Bounds Read via read_surface_class() in xwm.c

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Severity
medium
Date
Affecting

  • wlroots >= 0, < 0.20.2

CWE
  • CWE-125 Out-of-bounds Read
CVSS
4.8
CVSS V4 Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Credit
Tristan Madani (Talence Security), Simon Ser
Description
wlroots before 0.20.2 contains an out-of-bounds read vulnerability in read_surface_class() in xwayland/xwm.c that allows local X11 clients to leak compositor heap memory. Attackers can set a WM_CLASS property with a NUL-terminated instance but unterminated class, exposing over-read heap bytes as the window class or app_id over IPC.

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