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s3:passdb: Zero secrets_domain_info1_password created via secrets_fetch()

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Zero out these members of struct secrets_domain_info1_password:

DATA_BLOB cleartext_blob;
struct samr_Password nt_hash;
struct secrets_domain_info1_kerberos_key *keys;

Signed-off-by: Pavel Filipenský <pfilipensky@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
This commit is contained in:
Pavel Filipenský
2022-08-20 09:34:30 +02:00
committed by Andreas Schneider
parent 01c0ab191a
commit da2c723266
1 changed files with 29 additions and 0 deletions
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29
source3/passdb/machine_account_secrets.c
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@ -685,6 +685,28 @@ char *secrets_fetch_machine_password(const char *domain,
return ret;
}
static int password_nt_hash_destructor(struct secrets_domain_info1_password *pw)
{
ZERO_STRUCT(pw->nt_hash);
return 0;
}
static int setup_password_zeroing(struct secrets_domain_info1_password *pw)
{
if (pw != NULL) {
size_t i;
talloc_keep_secret(pw->cleartext_blob.data);
talloc_set_destructor(pw, password_nt_hash_destructor);
for (i = 0; i < pw->num_keys; i++) {
talloc_keep_secret(pw->keys[i].value.data);
}
}
return 0;
}
static char *domain_info_keystr(const char *domain)
{
char *keystr;
@ -726,6 +748,13 @@ static NTSTATUS secrets_fetch_domain_info1_by_key(const char *key,
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
if (sdib.info.info1->next_change != NULL) {
setup_password_zeroing(sdib.info.info1->next_change->password);
}
setup_password_zeroing(sdib.info.info1->password);
setup_password_zeroing(sdib.info.info1->old_password);
setup_password_zeroing(sdib.info.info1->older_password);
if (sdib.version != SECRETS_DOMAIN_INFO_VERSION_1) {
DBG_ERR("sdib.version = %u\n", (unsigned)sdib.version);
return NT_STATUS_INTERNAL_DB_CORRUPTION;