STIGQter STIGQter: STIG Summary: Traditional Security Checklist Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

Information Security (INFOSEC) - Secure Room Storage Standards - Balanced Magnetic Switch (BMS) on Perimeter Doors

DISA Rule

SV-245802r1138440_rule

Vulnerability Number

V-245802

Group Title

IS-02.01.08

Rule Version

IS-02.01.08

Severity

CAT I

CCI(s)

Weight

10

Fix Recommendation

Where an IDS is used in lieu of four-hour random checks for secure rooms or collateral classified open storage areas containing SIPRNet as well as other classified systems assets, each perimeter door (primary and secondary) must be protected by a balanced magnetic switch (BMS) that meets the standards of UL 634.

NOTE: The alarm contact must be an actual BMS, which is defined as a "Triple Biased" alarm contact. Introduction of a foreign magnet by an intruder in an attempt to defeat the BMS will result in an alarm being sent. Simple and Dual Biased contacts are not BMS and will result in a finding.

Check Contents

Where an IDS is used in lieu of 4-hour random checks, for secure rooms or collateral classified open storage areas containing SIPRNet as well as other classified systems assets, each perimeter door (primary and secondary) shall be protected by a balanced magnetic switch (BMS) that meets the standards of UL 634.

NOTE: Ensure the alarm contact is an actual BMS, which is defined as a "Triple Biased" alarm contact. Introduction of a foreign magnet by an intruder in an attempt to defeat the BMS will result in an alarm being sent.

If used, Simple and Dual Biased contacts are not BMS and will result in a CAT II finding.

No alarm contacts on all doors is a CAT I finding.

TACTICAL ENVIRONMENT: This check is applicable where Secure Rooms are used to protect classified materials or systems in a tactical environment. The only exception will be for urgent (short term) tactical operations or other contingency situations where fixed facilities and equipment are not yet present or incapable of being used.

Vulnerability Number

V-245802

Documentable

False

Rule Version

IS-02.01.08

Severity Override Guidance

Where an IDS is used in lieu of 4-hour random checks, for secure rooms or collateral classified open storage areas containing SIPRNet as well as other classified systems assets, each perimeter door (primary and secondary) shall be protected by a balanced magnetic switch (BMS) that meets the standards of UL 634.

NOTE: Ensure the alarm contact is an actual BMS, which is defined as a "Triple Biased" alarm contact. Introduction of a foreign magnet by an intruder in an attempt to defeat the BMS will result in an alarm being sent.

If used, Simple and Dual Biased contacts are not BMS and will result in a CAT II finding.

No alarm contacts on all doors is a CAT I finding.

TACTICAL ENVIRONMENT: This check is applicable where Secure Rooms are used to protect classified materials or systems in a tactical environment. The only exception will be for urgent (short term) tactical operations or other contingency situations where fixed facilities and equipment are not yet present or incapable of being used.

Check Content Reference

M

Target Key

5410