PT-2011-4794 · Qlogic+1 · Qlogic Adapters+1

Published 2011-10-05 · Updated 2017-08-29 · CVE-2011-3982

Positive Technologies (AI Summary)

CVSS v2.0

2.1

Low

Base vector

AV:L/AC:L/Au:N/C:N/I:N/A:P

Name of the Vulnerable Software and Affected Versions IBM AIX versions 6.1 through 7.1

Description The issue is related to the Fibre Channel driver for QLogic adapters, which does not properly handle DMA resource limitations. This can be exploited by local users to cause a denial of service, resulting in a system hang. The denial of service is caused by vectors that generate a large amount of DMA I/O, leading to a deadlock in timer processing across CPUs.

Recommendations For IBM AIX versions 6.1 through 7.1, consider restricting access to the Fibre Channel driver for QLogic adapters to minimize the risk of exploitation. As a temporary workaround, limit the amount of DMA I/O generated to prevent system hangs. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Weakness Enumeration

CWE-399

Related Identifiers

CVE-2011-3982

Affected Products

Aix

Qlogic Adapters

References · 9

• http://www-01.ibm.com/support/docview.wss?uid=isg1IZ96761 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2011-3982 · Security Note
• http://vupen.com/english/advisories/2011/0691 · Vendor Advisory
• http://www-01.ibm.com/support/docview.wss?uid=isg1IZ94675 · Vendor Advisory
• http://www-01.ibm.com/support/docview.wss?uid=isg1IZ94222 · Vendor Advisory
• http://www-01.ibm.com/support/docview.wss?uid=isg1IZ94593 · Vendor Advisory
• http://www-01.ibm.com/support/docview.wss?uid=isg1IZ94383 · Vendor Advisory
• http://vupen.com/english/advisories/2011/0275 · Vendor Advisory
• https://exchange.xforce.ibmcloud.com/vulnerabilities/67292 · Note