(Oracle Issues Fix for Oracle Linux) Xen RTL8139 Device Model Memory Initialization Bug Lets Local Users on a Guest System Obtain Potentially Sensitive Information from the Host System
SecurityTracker Alert ID: 1033570|
SecurityTracker URL: http://securitytracker.com/id/1033570
(Links to External Site)
Date: Sep 16 2015
Disclosure of authentication information, Disclosure of system information, Disclosure of user information, User access via local system|
Fix Available: Yes Vendor Confirmed: Yes |
A vulnerability was reported in Xen. A local user on the guest system can obtain potentially sensitive information from the host system.|
The QEMU RTL8139 network card model does not properly validate user-supplied input. A local user on a guest system can supply specially crafted data to view potentially sensitive information about the guest system from uninitialized portions of heap memory. The information includes data that the host administrator does not intend for the guest administrator to access, including data about physical devices backing emulated devices or about passwords.
Systems running x86 HVM guests without stubdomains configured with an emulated RTL8139 driver model are affected.
Systems using qemu-dm stubdomain device models are not affected.
Systems running only PV guests are not affected.
ARM systems are not affected.
Donghai Zhu of Alibaba reported this vulnerability.
A local user on the guest system can obtain potentially sensitive information about the guest system from the host system.|
Oracle has issued a fix.|
The Oracle Linux advisory is available at:
Vendor URL: linux.oracle.com/errata/ELSA-2015-1793.html (Links to External Site)
Access control error|
|Underlying OS: Linux (Oracle)|
|Underlying OS Comments: 7|
This archive entry is a follow-up to the message listed below.|
Source Message Contents
Subject: [El-errata] ELSA-2015-1793 Moderate: Oracle Linux 7 qemu-kvm security fix update|
Oracle Linux Security Advisory ELSA-2015-1793
The following updated rpms for Oracle Linux 7 have been uploaded to the
Unbreakable Linux Network:
Description of changes:
- kvm-rtl8139-check-IP-Header-Length-field-CVE-2015-5165.patch [bz#1248764]
- kvm-rtl8139-check-IP-Total-Length-field-CVE-2015-5165.patch [bz#1248764]
- kvm-rtl8139-check-TCP-Data-Offset-field-CVE-2015-5165.patch [bz#1248764]
- Resolves: bz#1248764
(CVE-2015-5165 qemu-kvm: Qemu: rtl8139 uninitialized heap memory
information leakage to guest [rhel-7.1.z])
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