Access Control: MQ

ABSTRACT

允許用戶輸入控制 MQ 對象描述符的字段，可以讓攻擊者有機會訪問或修改原本受保護的 MQ 資源。

EXPLANATION

如果攻擊者能夠提供被應用程序用于確定在打開 MQ 對象時執行哪種類型授權檢查的值，他們在嘗試打開原本無法訪問的對象時有可能通過所有 access control 檢查。

示例：下列 COBOL 代碼片段從終端中讀取值，并使用它們來控制 MQ 對象描述符的 MQOD-ALTERNATEUSERID 和 MQOD-ALTERNATESECURITYID 字段。


...
10 MQOD.
**    Alternate user identifier
15 MQOD-ALTERNATEUSERID     PIC X(12).
**    Alternate security identifier
15 MQOD-ALTERNATESECURITYID PIC X(40).
   ...
...
ACCEPT MQOD-ALTERNATEUSERID.
ACCEPT MQOD-ALTERNATESECURITYID.
CALL 'MQOPEN' USING HCONN, MQOD, OPTS, HOBJ, COMPOCODE REASON.
...

在此示例中，攻擊者可以提供使其能夠在打開的 MQ 對象上通過 access control 檢查的值。

總之，應禁止使用用戶提供的數據或通過其他途徑獲取不可信任的數據，以防止攻擊者控制某些敏感的數值。

REFERENCES

[1] Standards Mapping - OWASP Top 10 2004 - (OWASP 2004) A2 Broken Access Control

[2] Standards Mapping - OWASP Top 10 2007 - (OWASP 2007) A4 Insecure Direct Object Reference

[3] Standards Mapping - OWASP Top 10 2010 - (OWASP 2010) A4 Insecure Direct Object References

[4] Standards Mapping - FIPS200 - (FISMA) AC

[5] Standards Mapping - Security Technical Implementation Guide Version 3 - (STIG 3) APP3510 CAT I

[6] Standards Mapping - Security Technical Implementation Guide Version 3.4 - (STIG 3.4) APP3510 CAT I

[7] Standards Mapping - Common Weakness Enumeration - (CWE) CWE ID 639

[8] Standards Mapping - Web Application Security Consortium 24 + 2 - (WASC 24 + 2) Insufficient Authorization

[9] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 - (PCI 1.1) Requirement 6.5.2

[10] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 - (PCI 1.2) Requirement 6.5.4

[11] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 - (PCI 2.0) Requirement 6.5.8

97av