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Bug 1636773 - (CVE-2018-17962) CVE-2018-17962 Qemu: pcnet: integer overflow leads to buffer overflow
CVE-2018-17962 Qemu: pcnet: 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
: 1613561 (view as bug list)
Depends On: 1636774 1636775 1636776
Blocks: 1581014 1613563
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Reported: 2018-10-07 11:26 EDT by Prasad J Pandit
Modified: 2018-10-09 11:42 EDT (History)
20 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
An integer overflow issue was found in the AMD PC-Net II NIC emulation in QEMU. It could occur while receiving packets, if the size value was 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.
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Description Prasad J Pandit 2018-10-07 11:26:18 EDT 
Qemu emulator built with the AMD PC-Net II (Am79C970A) 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/msg03268.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 11:26:40 EDT 
Acknowledgments:

Name: Daniel Shapira (Twistlock), Arash Tohidi
Comment 2 Prasad J Pandit 2018-10-07 11:28:07 EDT 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1636775]


Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1636776]
Comment 4 Prasad J Pandit 2018-10-08 00:34:29 EDT 
*** Bug 1613561 has been marked as a duplicate of this bug. ***
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