Bug 1516925 (CVE-2017-15119) - CVE-2017-15119 qemu: DoS via large option request
Summary: CVE-2017-15119 qemu: DoS via large option request
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-15119
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: 1518239 1518238 1518529 1518530 1518531 1518532 1518533 1518534 1518535 1518536 1518551 1520242
Blocks: 1516927 1520691
TreeView+ depends on / blocked
 
Reported: 2017-11-23 15:16 UTC by Adam Mariš
Modified: 2021-02-17 01:12 UTC (History)
53 users (show)

Fixed In Version: qemu 2.11
Doc Type: Bug Fix
Doc Text:
The Network Block Device (NBD) server in Quick Emulator (QEMU), is vulnerable to a denial of service issue. It could occur if a client sent large option requests, making the server waste CPU time on reading up to 4GB per request. A client could use this flaw to keep the NBD server from serving other requests, resulting in DoS.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:31:55 UTC
Embargoed:

Attachments (Terms of Use)
Proposed patch (1.38 KB, patch)
2017-11-23 15:25 UTC, Adam Mariš 		no flags Details | Diff
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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:1104 0 None None None 2018-04-10 18:59:16 UTC
Red Hat Product Errata RHSA-2018:1113 0 None None None 2018-04-11 18:04:39 UTC

Description Adam Mariš 2017-11-23 15:16:27 UTC 
Quick Emulator(Qemu) built with the Network Block Device(NBD) server support is vulnerable to a denial-of-service issue. It could occur if a client sent large option requests, making server waste CPU time on reading up to 4G bytes.

A client could use this flaw to keep the NBD server from serving other requests, resulting in DoS.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-11/msg05044.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2017/11/28/9
Comment 1 Adam Mariš 2017-11-23 15:16:44 UTC 
Acknowledgments:

Name: Eric Blake (Red Hat)
Comment 2 Adam Mariš 2017-11-23 15:25:54 UTC 
Created attachment 1358263 [details]
Proposed patch
Comment 3 Prasad Pandit 2017-11-28 13:28:33 UTC 
Created qemu tracking bugs for this issue:

Affects: epel-7 [bug 1518239]
Affects: fedora-all [bug 1518238]
Comment 8 Mark Knowles 2017-12-04 06:20:37 UTC 
Created qemu-kvm tracking bugs for this issue:

Affects: openshift-1 [bug 1520241]
Comment 19 errata-xmlrpc 2018-04-10 18:58:51 UTC 
This issue has been addressed in the following products:

  Red Hat Virtualization 4 for RHEL-7

Via RHSA-2018:1104 https://access.redhat.com/errata/RHSA-2018:1104
Comment 20 errata-xmlrpc 2018-04-11 18:04:18 UTC 
This issue has been addressed in the following products:

  Red Hat OpenStack Platform 10.0 (Newton)
  Red Hat OpenStack Platform 11.0 (Ocata)
  Red Hat OpenStack Platform 8.0 (Liberty)
  Red Hat OpenStack Platform 9.0 (Mitaka)
  Red Hat OpenStack Platform 12.0 (Pike)

Via RHSA-2018:1113 https://access.redhat.com/errata/RHSA-2018:1113
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