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fix: memory leak and use-after-free in APatch Zygiskd code

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This commit fixes a memory leak and a user-after-free vulnerability in APatch code of Zygiskd.
This commit is contained in:
ThePedroo
2024-11-08 17:18:49 -03:00
parent 135ebbb9ba
commit c4ab77ed9e
1 changed files with 16 additions and 8 deletions
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24
zygiskd/src/root_impl/apatch.c
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@@ -140,13 +140,18 @@ bool apatch_uid_granted_root(uid_t uid) {
}
for (size_t i = 0; i < config.size; i++) {
if (config.configs[i].uid == uid) {
_apatch_free_package_config(&config);
if (config.configs[i].uid != uid) continue;
return config.configs[i].root_granted;
}
/* INFO: This allow us to copy the information to avoid use-after-free */
bool root_granted = config.configs[i].root_granted;
_apatch_free_package_config(&config);
return root_granted;
}
_apatch_free_package_config(&config);
return false;
}
@@ -159,11 +164,14 @@ bool apatch_uid_should_umount(uid_t uid) {
}
for (size_t i = 0; i < config.size; i++) {
if (config.configs[i].uid == uid) {
_apatch_free_package_config(&config);
if (config.configs[i].uid != uid) continue;
return config.configs[i].umount_needed;
}
/* INFO: This allow us to copy the information to avoid use-after-free */
bool umount_needed = config.configs[i].umount_needed;
_apatch_free_package_config(&config);
return umount_needed;
}
_apatch_free_package_config(&config);