Bug 201684
| Summary: | CVE-2006-4093 Local DoS through uncleared HID0[31] | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 4 | Reporter: | Marcel Holtmann <holtmann> |
| Component: | kernel | Assignee: | Janice Girouard - IBM on-site partner <jgirouar> |
| Status: | CLOSED ERRATA | QA Contact: | Brian Brock <bbrock> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 4.0 | CC: | dwmw2, jbaron, security-response-team |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | impact=moderate,source=vendorsec,reported=20060808,embargo=20060817,public=20060817 | ||
| Fixed In Version: | RHSA-2006-0689 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2006-10-05 19:18:35 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Created attachment 133779 [details]
Proposed patch from Olof Johansson
committed in stream E5 build 42.0.3 This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release. committed in stream U5 build 42.14. A test kernel with this patch is available from http://people.redhat.com/~jbaron/rhel4/ QE ack for 4.5. An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2006-0689.html |
Report from Olof Johansson: On PPC970, having HID0[31] (en_attn) set makes it possible to wedge the machine by just doing an 'asm volatile("attn");' from userspace, clearly a local DoS exposure. Apple firmware seems to set it and we don't clear it at boot time. I'm not aware of any intentional exploits of this. I happened to come across it by running crash01 from LTP, it tries to execute random data as code and kept locking up my machine.