Bug 1483534 (CVE-2017-12809) - CVE-2017-12809 Qemu: ide: flushing of empty CDROM drives leads to NULL dereference
Summary: CVE-2017-12809 Qemu: ide: flushing of empty CDROM drives leads to NULL derefe...
Alias: CVE-2017-12809
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1483536
Blocks: 1455462
TreeView+ depends on / blocked
Reported: 2017-08-21 11:15 UTC by Prasad Pandit
Modified: 2021-02-17 01:42 UTC (History)
38 users (show)

Fixed In Version:
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Last Closed: 2019-06-08 03:21:24 UTC

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Description Prasad Pandit 2017-08-21 11:15:24 UTC
Quick emulator built with the IDE disk and CD/DVD-ROM Emulator support is
vulnerable to a null pointer dereference issue. It could occur while
flushing an empty CDROM device drive.

A privileged user inside guest could use this flaw to crash the Qemu process
resulting in DoS.

Upstream patch:
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-08/msg01850.html

  -> http://www.openwall.com/lists/oss-security/2017/08/21/2

Comment 1 Prasad Pandit 2017-08-21 11:16:05 UTC

Name: Ryan Salsamendi (Palo Alto Networks PSIRT)

Comment 2 Prasad Pandit 2017-08-21 11:17:37 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1483536]

Comment 3 Fedora Update System 2017-11-07 22:14:06 UTC
qemu-2.9.1-2.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.

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