Remote Information Disclosure and Escalation of Privileges in ManageEngine Desktop Central MSP 10.0.137 allows attackers to download unencrypted XML files containing all data for configuration policies via a predictable /client-data/<client_id>/collections/##/usermgmt.xml URL, as demonstrated by passwords and Wi-Fi keys. This is fixed in build 100157.
Weakness
The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Manageengine_desktop_central | Zohocorp | 10.0.137 (including) | 10.0.137 (including) |
Potential Mitigations
- Use a well-vetted algorithm that is currently considered to be strong by experts in the field, and select well-tested implementations with adequate length seeds.
- In general, if a pseudo-random number generator is not advertised as being cryptographically secure, then it is probably a statistical PRNG and should not be used in security-sensitive contexts.
- Pseudo-random number generators can produce predictable numbers if the generator is known and the seed can be guessed. A 256-bit seed is a good starting point for producing a “random enough” number.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/112.html
- https://cwe.mitre.org/data/definitions/485.html
- https://cwe.mitre.org/data/definitions/59.html
References
- https://github.com/snoonan77/security-research/blob/master/CVE-2017-16924
- https://www.manageengine.com/desktop-management-msp/password-encryption-policy-violation.html
- https://github.com/snoonan77/security-research/blob/master/CVE-2017-16924
- https://www.manageengine.com/desktop-management-msp/password-encryption-policy-violation.html