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Diffstat (limited to 'lib/efi_loader/efi_variable.c')
-rw-r--r--lib/efi_loader/efi_variable.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c
index 74a9c65402..f9a0efd427 100644
--- a/lib/efi_loader/efi_variable.c
+++ b/lib/efi_loader/efi_variable.c
@@ -481,11 +481,15 @@ static efi_status_t efi_variable_authenticate(u16 *variable,
if (guidcmp(&auth->auth_info.cert_type, &efi_guid_cert_type_pkcs7))
goto err;
+ memcpy(&timestamp, &auth->time_stamp, sizeof(timestamp));
+ if (timestamp.pad1 || timestamp.nanosecond || timestamp.timezone ||
+ timestamp.daylight || timestamp.pad2)
+ goto err;
+
*data += sizeof(auth->time_stamp) + auth->auth_info.hdr.dwLength;
*data_size -= (sizeof(auth->time_stamp)
+ auth->auth_info.hdr.dwLength);
- memcpy(&timestamp, &auth->time_stamp, sizeof(timestamp));
memset(&tm, 0, sizeof(tm));
tm.tm_year = timestamp.year;
tm.tm_mon = timestamp.month;