IBM OS/400 BrSmRcvAndCheck buffer overflow

os400-brsmrcvandcheck-bo (42984)

High Risk

Description:

IBM OS/400 is vulnerable to a buffer overflow, caused by improper bounds checking within BrSmRcvAndCheck. By running diagnostics on a modem port, a local attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.

*CVSS:

Base Score:	4.6
Access Vector:	Local
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial
Temporal Score:	3.4
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Access

Remedy:

Refer to IBM Support & downloads Web site for patch, upgrade or suggested workaround information. See References.

References:

• IBM Support & downloads: MA36741 - IPL-SRCB6000302-UNPRED IOPNIOA00020010 TASK HALT DURING IPL WITH SRCB6000302.
• BID-29660: IBM OS/400 'BrSmRcvAndCheck()' Buffer Overflow Vulnerability
• CVE-2008-2709: Buffer overflow in the BrSmRcvAndCheck function in the RCHMGR module on IBM OS/400 V5R4M0, V5R4M5, and V6R1M0 allows local users to cause a denial of service (task halt and main storage dump) via unspecified vectors involving the running of diagnostics on a modem port. NOTE: there might be limited attack scenarios.
• SA30554: IBM OS/400 Buffer Overflow Vulnerability
• VUPEN/ADV-2008-1799: IBM OS/400 BrSmRcvAndCheck Local Buffer Overflow Vulnerability

Platforms Affected:

• IBM OS 400 V5R4M0
• IBM OS 400 V5R4M5
• IBM OS 400 V6R1M0

Reported:

Jun 06, 2008

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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