Bug 1664205 (CVE-2019-6778) - CVE-2019-6778 QEMU: slirp: heap buffer overflow in tcp_emu()
Summary: CVE-2019-6778 QEMU: slirp: heap buffer overflow in tcp_emu()
Status: NEW
Alias: CVE-2019-6778
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=20190111,repo...
Keywords: Security
Depends On: 1669066 1669067 1669068 1669069 1669070 1669071 1669371 1669373 1669374 1669375 1693076 1669072 1669369 1669370
Blocks: 1664206
TreeView+ depends on / blocked
 
Reported: 2019-01-08 02:39 UTC by Sam Fowler
Modified: 2019-05-16 08:30 UTC (History)
37 users (show)

(edit)
A heap buffer overflow issue was found in the SLiRP networking implementation of the QEMU emulator. It occurs in tcp_emu() routine while emulating the Identification protocol and copying message data to a socket buffer. A user or process could use this flaw to crash the QEMU process on the host resulting in a DoS or potentially executing arbitrary code with privileges of the QEMU process.
Clone Of:
(edit)
Last Closed:


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Description Sam Fowler 2019-01-08 02:39:09 UTC
A heap buffer overflow issue was found in the SLiRP networking implementation
of the QEMU emulator. It occurs in tcp_emu() routine while emulating
Identification protocol and copying message data to a socket buffer. 

A user/process could use this flaw to crash the Qemu process on the host
resulting in DoS or potentially execute arbitrary code with privileges of the 
QEMU process.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2019-01/msg03132.html

Reference:
----------
  -> https://www.openwall.com/lists/oss-security/2019/01/24/5

Comment 1 Sam Fowler 2019-01-09 00:05:26 UTC
Acknowledgments:

Name: Kira (Tencent Keen Security Lab)

Comment 3 Prasad J Pandit 2019-01-24 09:20:17 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1669072]

Comment 7 James Hebden 2019-01-25 03:59:14 UTC
Statement:

Red Hat OpenStack Platform:                                                                                                                 
This flaw impacts KVM user-mode or SLIRP networking, which is not used in Red Hat OpenStack. Updating is recommended, however Red Hat OpenStack installs are not vulnerable to the described flaw due to the vulnerable feature not being used.


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