BES IT Policy rule must be configured as required. IT Policy rule Disallow File Transfer Types (Instant Messaging policy group) must be set as required.

From BlackBerry Enterprise Server (version 5.x), Part 3 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

SV-21899r4_rule BES IT Policy rule must be configured as required. IT Policy rule Disallow File Transfer Types (Instant Messaging policy group) must be set as required.

Vulnerability discussion

Insecure file types are transferred to BlackBerry via IM, increasing the risk of malware being downloaded on the BlackBerry and being transferred to the DoD enclave.

Check content

Detailed Policy Requirements: File types with known vulnerabilities will not be downloaded via an IM connection. Specific banned file types are based on local policy (e.g., .exe, .bat.). *****For this check, set IT Policy rule "Disallow File Transfer Types" (Instant Messaging policy group) to "*" (to block all files) or specify specific file types to block based on local policy (e.g., .exe, .bat, mp3, .zip). Check Procedures: This is a BES IT Policy check. Recommend all checks related to BES IT policies be reviewed using the procedure in Check WIR1400-01 (V0003545). *****Verify IT Policy rule "Disallow File Transfer Types" (Instant Messaging policy group) is set as required. If not set as required, this is a finding.

Fix text

Configure the IT Policy rule as specified in the "Checks" block.

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