Bug 1030986 (CVE-2013-4587) - CVE-2013-4587 kernel: kvm: rtc_status.dest_map out-of-bounds access
Summary: CVE-2013-4587 kernel: kvm: rtc_status.dest_map out-of-bounds access
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2013-4587
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=important,public=20131212,repo...
Depends On: 1042071 1042074
Blocks: 1030995
TreeView+ depends on / blocked
 
Reported: 2013-11-15 12:54 UTC by Petr Matousek
Modified: 2019-06-08 19:47 UTC (History)
12 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-11-15 12:55:44 UTC


Attachments (Terms of Use)

Description Petr Matousek 2013-11-15 12:54:26 UTC
In several functions vcpu_id is used as an offset into rtc_status.dest_map in order to set or clear bits in kernel memory, potentially leading to out-of-bound access when vcpu_id is larger than 255. 

An unprivileged local user could use this flaw to elevate their privileges on the system.

Acknowledgements:

Red Hat would like to thank Andrew Honig of Google for reporting this issue.

Comment 1 Petr Matousek 2013-11-15 12:55:44 UTC
Statement:

Not vulnerable.

This issue did not affect the versions of kvm packages as shipped with Red Hat Enterprise Linux 5. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise 6.

This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise MRG 2 as they did not provide support for the KVM subsystem.

Comment 4 Petr Matousek 2013-12-12 20:50:53 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1042071]

Comment 5 Fedora Update System 2013-12-21 02:14:13 UTC
kernel-3.12.5-200.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2013-12-21 02:24:02 UTC
kernel-3.12.5-302.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.


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