A security flaw involving hard-coded credentials in LevelOne WBR-6012s web services allows attackers to gain unauthorized access during the first 30 seconds post-boot. Other vulnerabilities can force a reboot, circumventing the initial time restriction for exploitation.The backdoor string can be found at address 0x80100910
80100910 40 6d 21 74 ds @m!t2K1
32 4b 31 00
It is referenced by the function located at 0x800b78b0 and is used as shown in the pseudocode below:
if ((SECOND_FROM_BOOT_TIME < 300) &&
(is_equal = strcmp(password,@m!t2K1)) {
return 1;}
Where 1 is the return value to admin-level access (0 being fail and 3 being user).
The product contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Wbr-6012_firmware | Level1 | r0.40e6 (including) | r0.40e6 (including) |
Hard-coded credentials typically create a significant hole that allows an attacker to bypass the authentication that has been configured by the product administrator. This hole might be difficult for the system administrator to detect. Even if detected, it can be difficult to fix, so the administrator may be forced into disabling the product entirely. There are two main variations:
In the Inbound variant, a default administration account is created, and a simple password is hard-coded into the product and associated with that account. This hard-coded password is the same for each installation of the product, and it usually cannot be changed or disabled by system administrators without manually modifying the program, or otherwise patching the product. If the password is ever discovered or published (a common occurrence on the Internet), then anybody with knowledge of this password can access the product. Finally, since all installations of the product will have the same password, even across different organizations, this enables massive attacks such as worms to take place. The Outbound variant applies to front-end systems that authenticate with a back-end service. The back-end service may require a fixed password which can be easily discovered. The programmer may simply hard-code those back-end credentials into the front-end product. Any user of that program may be able to extract the password. Client-side systems with hard-coded passwords pose even more of a threat, since the extraction of a password from a binary is usually very simple.