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Bug 1636712 - (CVE-2018-17958) CVE-2018-17958 Qemu: rtl8139: integer overflow leads to buffer overflow
CVE-2018-17958 Qemu: rtl8139: integer overflow leads to buffer overflow
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20180926,repor...
: Security
Depends On: 1636726 1636727 1636728 1636729 1636730 1636731 1636732 1636733 1636734 1636735 1636736 1636738
Blocks: 1581014
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Reported: 2018-10-07 03:06 EDT by Prasad J Pandit
Modified: 2018-10-09 10:44 EDT (History)
34 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
An integer overflow issue was found in the RTL8139 NIC emulation in QEMU. It could occur while receiving packets over the network if the size value is greater than INT_MAX. Such overflow would lead to stack buffer overflow issue. A user inside guest could use this flaw to crash the QEMU process, resulting in DoS scenario.
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Description Prasad J Pandit 2018-10-07 03:06:17 EDT 
Qemu emulator built with the RTL8139 NIC emulation support is vulnerable to an integer overflow, which could lead to buffer overflow issue. It could occur when receiving packets over the network.

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

Upstream fix:
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  -> https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03269.html

Reference:
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  -> https://www.openwall.com/lists/oss-security/2018/10/08/1
Comment 1 Prasad J Pandit 2018-10-07 03:06:41 EDT 
Acknowledgments:

Name: Daniel Shapira (Twistlock), Arash Tohidi
Comment 2 Prasad J Pandit 2018-10-07 05:30:05 EDT 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1636729]


Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1636730]
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