Bug 1248997 (CVE-2015-5166, xsa139) - CVE-2015-5166 Qemu: BlockBackend object use after free issue (XSA-139)
Summary: CVE-2015-5166 Qemu: BlockBackend object use after free issue (XSA-139)
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2015-5166, xsa139
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: Engineering1249000 Engineering1249001 Engineering1249002 Engineering1249003 1249757 1249758
Blocks: Embargoed1243299
TreeView+ depends on / blocked
 
Reported: 2015-07-31 09:59 UTC by Prasad Pandit
Modified: 2023-05-12 23:34 UTC (History)
25 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A flaw has been found in the QEMU emulator built with IDE Emulation PCI PIIX3/4 support; the emulator is vulnerable to a use-after-free flaw, while writing data to an I/O port inside a guest. This issue is specific to the Xen platform. A privileged(CAP_SYS_RAWIO) guest user on the Xen platform could use this flaw to crash the QEMU instance or attempt to make a guest escape to QEMU-process privileges.
Clone Of:
Environment:
Last Closed: 2019-06-08 02:42:58 UTC

Attachments (Terms of Use)

Description Prasad Pandit 2015-07-31 09:59:27 UTC 
Qemu emulator built with the IDE Emulation PCI PIIX3/4 support is vulnerable
to a use-after-free flaw. It could occur when trying to write data to an I/O
port inside guest. This issue is specific to the Xen platform.

A privileged(CAP_SYS_RAWIO) guest user on the Xen platform could use this flaw
to crash the Qemu instance or probably attempt to make a guest escape.

Upstream fix:
-------------
  -> git.qemu.org/?p=qemu.git;a=commit;h=6cd387833d05e8ad31829d97e474dc420625aed9

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2015/08/03/3
Comment 3 Prasad Pandit 2015-07-31 10:09:12 UTC 
Statement: 

This issue does not affect the versions of kvm and xen packages as shipped with Red Hat Enterprise Linux 5.

This issue does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6.

This issue does not affect the Red Hat Enterprise Linux 6 based versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.

This issue does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 7.

This issue does not affect the Red Hat Enterprise Linux 7 based versions of the qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.

This issue does not affect the qemu-kvm-rhev packages as shipped with any currently supported versions of Red Hat Enterprise Linux OpenStack Platform.
Comment 6 Prasad Pandit 2015-08-03 17:35:27 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1249757]
Comment 7 Prasad Pandit 2015-08-03 17:35:30 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1249758]
Comment 8 Martin Prpič 2015-08-04 08:09:55 UTC 
External References:

http://xenbits.xen.org/xsa/advisory-139.html
Comment 9 Martin Prpič 2015-08-04 08:11:54 UTC 
Acknowledgement:

Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Donghai Zhu of Alibaba as the original reporter.
Comment 10 Fedora Update System 2015-08-18 05:16:55 UTC 
qemu-2.3.1-1.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 11 Fedora Update System 2015-08-23 16:40:25 UTC 
qemu-2.4.0-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 12 Fedora Update System 2015-08-26 21:08:38 UTC 
xen-4.5.1-6.fc23 has been submitted as an update to Fedora 23. https://bodhi.fedoraproject.org/updates/FEDORA-2015-14361
Comment 13 Fedora Update System 2015-08-26 21:13:03 UTC 
xen-4.5.1-6.fc22 has been submitted as an update to Fedora 22. https://bodhi.fedoraproject.org/updates/FEDORA-2015-14362
Comment 14 Fedora Update System 2015-08-26 21:16:08 UTC 
xen-4.4.3-1.fc21 has been submitted as an update to Fedora 21. https://bodhi.fedoraproject.org/updates/FEDORA-2015-14363
Comment 15 Fedora Update System 2015-09-01 18:31:14 UTC 
xen-4.5.1-6.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 16 Fedora Update System 2015-09-26 21:49:43 UTC 
xen-4.4.3-3.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.
Comment 17 Fedora Update System 2015-09-27 03:22:11 UTC 
xen-4.5.1-8.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
Note You need to log in before you can comment on or make changes to this bug.