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6211 fix jailbreak heap overhang #1043

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Mar 17, 2021
Merged

6211 fix jailbreak heap overhang #1043

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7 changes: 7 additions & 0 deletions Bugsnag/KSCrash/Source/KSCrash/Recording/BSG_Jailbreak.h
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Original file line number Diff line number Diff line change
Expand Up @@ -49,10 +49,17 @@
extern char **environ;

static inline bool bsg_local_is_insert_libraries_env_var(const char* str) {
if (str == NULL) {
return false;
}

// DYLD_INSERT_LIBRARIES lets you override functions by loading other libraries first.
// This is a common technique used for defeating detection.
// See: https://opensource.apple.com/source/dyld/dyld-832.7.3/doc/man/man1/dyld.1
const char insert[] = "DYLD_INSERT_LIBRARIES";
if (strlen(str) < sizeof(insert)) {
return false;
}
return __builtin_memcmp(str, insert, sizeof(insert)) == 0;
}

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