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CVE-2018-11808: Zohocorp Manageengine Applications Manager: Improper Input Validation

CVE-2018-11808 is rated critical with a CVSS v3.0 base score of 9.1 and affects Zohocorp Manageengine Applications Manager. Per its scoring, it can be exploited over the network, without authentication, without any user interaction.

Vulnerability description

Incorrect Access Control in CustomFieldsFeedServlet in Zoho ManageEngine Applications Manager Version 13 before build 13740 allows an attacker to delete any file and read certain files on the server in the context of the user (which by default is "NT AUTHORITY / SYSTEM") by sending a specially crafted request to the server.

Severity breakdown

CVSS v3.0 9.1: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

• Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
• Attack complexity: Low. No special conditions; the attack can be repeated reliably.
• Privileges required: None. No account or prior access is needed.
• User interaction: None. No action from any user is needed.
• Scope: Unchanged. Impact stays within the vulnerable component.
• Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
• Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
• Availability impact: None. No effect on availability.

Underlying weakness

CWE-20: Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected products

• Zohocorp Manageengine Applications Manager: 13

References

• https://www.manageengine.com/products/applications_manager/issues.html
• http://www.securityfocus.com/bid/104467
• https://github.com/kactrosN/publicdisclosures
• https://www.manageengine.com/products/applications_manager/security-updates/security-updates-cve-2018-11808.html