Milan Kyselica
f92dad9bf9
callerid: fix signed char causing crash in MDMF parser
...
Change rawdata buffer from char to unsigned char to prevent
sign-extension of TLV length bytes >= 0x80. On signed-char
platforms (all Asterisk builds due to -fsigned-char in
configure.ac), these values become negative when assigned to
int, bypass the `if (res > 32)` bounds check, and reach
memcpy as size_t producing a ~18 EB read that immediately
crashes with SIGSEGV.
Affects DAHDI analog (FXO) channels only. Not reachable
via SIP, PRI/BRI, or DTMF-based Caller ID.
Fixes : #1839
2026-06-04 13:04:18 +00:00
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