CVE-2017-7539: Input Validation
First published: Fri Jul 21 2017(Updated: )
An assertion-failure flaw was found in Qemu before 2.10.1, in the Network Block Device (NBD) server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to crash the qemu-nbd server resulting in denial of service.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU | <2.10.1 | |
| Red Hat OpenStack for IBM Power | =6.0 | |
| Red Hat OpenStack for IBM Power | =7.0 | |
| Red Hat OpenStack for IBM Power | =8 | |
| Red Hat OpenStack for IBM Power | =9 | |
| Red Hat OpenStack for IBM Power | =10 | |
| Red Hat OpenStack for IBM Power | =11 | |
| Red Hat Enterprise Virtualization | =4.0 | |
| Red Hat Enterprise Virtualization | =3.0 | |
| Red Hat Enterprise Linux | =7.0 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2017/07/21/4
- http://www.securityfocus.com/bid/99944
- https://access.redhat.com/errata/RHSA-2017:2628
- https://access.redhat.com/errata/RHSA-2017:3466
- https://access.redhat.com/errata/RHSA-2017:3470
- https://access.redhat.com/errata/RHSA-2017:3471
- https://access.redhat.com/errata/RHSA-2017:3472
- https://access.redhat.com/errata/RHSA-2017:3473
- https://access.redhat.com/errata/RHSA-2017:3474
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7539
- https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=2b0bbc4f8809c972bad134bc1a2570dbb01dea0b
- https://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=ff82911cd3f69f028f2537825c9720ff78bc3f19
- http://git.qemu.org/?p=qemu.git;a=commitdiff;h=2b0bbc4f8809c972bad134bc1a2570dbb01dea0b
- http://git.qemu.org/?p=qemu.git;a=commitdiff;h=ff82911cd3f69f028f2537825c9720ff78bc3f19
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1473625
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1473624
- https://bugzilla.redhat.com/show_bug.cgi?id=1473622
Frequently Asked Questions
What is the severity of CVE-2017-7539?
CVE-2017-7539 has a medium severity rating due to the potential for denial of service attacks.
How do I fix CVE-2017-7539?
To fix CVE-2017-7539, upgrade QEMU to version 2.10.1 or later, or apply relevant patches provided by your software vendor.
Which versions of QEMU are affected by CVE-2017-7539?
QEMU versions prior to 2.10.1 are affected by CVE-2017-7539.
Can CVE-2017-7539 be exploited remotely?
Yes, CVE-2017-7539 can be exploited remotely by sending unexpected data during connection negotiation to the qemu-nbd server.
What software products are impacted by CVE-2017-7539?
Software products impacted by CVE-2017-7539 include QEMU versions earlier than 2.10.1 and several versions of Red Hat OpenStack.
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- vendor/qemu
- canonical/qemu
- vendor/redhat
- canonical/red hat openstack for ibm power
- version/red hat openstack for ibm power/6.0
- version/red hat openstack for ibm power/7.0
- version/red hat openstack for ibm power/8
- version/red hat openstack for ibm power/9
- version/red hat openstack for ibm power/10
- version/red hat openstack for ibm power/11
- canonical/red hat enterprise virtualization
- version/red hat enterprise virtualization/4.0
- version/red hat enterprise virtualization/3.0
- canonical/red hat enterprise linux
- version/red hat enterprise linux/7.0