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Impero Education Pro classroom management software vulnerable to remote code execution

Vulnerability Note VU#549807

Original Release Date: 2015-09-09 | Last Revised: 2015-09-10

Overview

Impero Software Education Pro classroom management software is vulnerable to remote code execution via improper encryption and authentication mechanisms.

Description

CWE-321: Use of Hard-coded Cryptographic Key

CWE-329: Not Using a Random IV with CBC Mode - CVE-2015-5997

According to the reporter, Impero uses a custom encryption protocol derived from AES-128 CBC. However, the AES implementation uses a hard-coded encryption key and initialization vector that are both derived from the SHA512 of the string "Imp3ro". Use of these hard-coded encryption values common to all instances of Impero allows an attacker to decrypt packets.

CWE-287: Improper Authentication - CVE-2015-5998

According to the reporter, authentication is performed only by sending the message "-1|AUTHENTICATE\x02PASSWORD". As this message may be spoofed once the encryption method is known, this authentication method is insufficient properly perform authentication.

Once authentication is gained, the attacker may execute Impero commands. These Impero commands include the ability to run programs with SYSTEM privileges, which an attacker may be able to use to remotely execute code.

According to Impero Software, Impero 5008 and below are vulnerable.

Impact

A remote unauthenticated attacker may be able to execute commands on the machine running Impero.

Solution

Apply an update

Impero has released Impero 5105 to address this issue. Affected users are encouraged to update to Impero 5105 or later as soon as possible. Affected users may contact Impero Software support for more information and to obtain the update.

Vendor Information

549807
 
Affected   Unknown   Unaffected

Impero

Notified:  July 29, 2015 Updated:  September 01, 2015

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.


CVSS Metrics

Group Score Vector
Base 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C
Temporal 7.8 E:POC/RL:OF/RC:C
Environmental 5.9 CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

Credit

Thanks to slipstream/RoL for reporting this vulnerability.

This document was written by Garret Wassermann.

Other Information

CVE IDs: CVE-2015-5997, CVE-2015-5998
Date Public: 2015-07-14
Date First Published: 2015-09-09
Date Last Updated: 2015-09-10 12:53 UTC
Document Revision: 61

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