SUSE SLES11 Security Update : xen (SUSE-SU-2017:2339-1)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote SUSE host is missing one or more security updates.

Description :

This update for xen fixes the following issues :

- CVE-2017-12855: Premature clearing of GTF_writing /
GTF_reading lead to potentially leaking sensitive
information (XSA-230, bsc#1052686).

- CVE-2017-12135: Unbounded recursion in grant table code
allowed a malicious guest to crash the host or
potentially escalate privileges/leak information
(XSA-226, bsc#1051787).

- CVE-2017-12137: Incorrectly-aligned updates to
pagetables allowed for privilege escalation (XSA-227,
bsc#1051788).

- CVE-2017-11334: The address_space_write_continue
function in exec.c allowed local guest OS privileged
users to cause a denial of service (out-of-bounds access
and guest instance crash) by leveraging use of
qemu_map_ram_ptr to access guest ram block area
(bsc#1048920).

- CVE-2017-11434: The dhcp_decode function in
slirp/bootp.c allowed local guest OS users to cause a
denial of service (out-of-bounds read) via a crafted
DHCP options string (bsc#1049578).

- CVE-2017-10664: qemu-nbd did not ignore SIGPIPE, which
allowed remote attackers to cause a denial of service
(daemon crash) by disconnecting during a
server-to-client reply attempt (bsc#1046637).

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

See also :

https://bugzilla.suse.com/1046637
https://bugzilla.suse.com/1048920
https://bugzilla.suse.com/1049578
https://bugzilla.suse.com/1051787
https://bugzilla.suse.com/1051788
https://bugzilla.suse.com/1052686
https://www.suse.com/security/cve/CVE-2017-10664.html
https://www.suse.com/security/cve/CVE-2017-11334.html
https://www.suse.com/security/cve/CVE-2017-11434.html
https://www.suse.com/security/cve/CVE-2017-12135.html
https://www.suse.com/security/cve/CVE-2017-12137.html
https://www.suse.com/security/cve/CVE-2017-12855.html
http://www.nessus.org/u?bf77102a

Solution :

To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server 11-SP3-LTSS:zypper in -t patch
slessp3-xen-13259=1

SUSE Linux Enterprise Point of Sale 11-SP3:zypper in -t patch
sleposp3-xen-13259=1

SUSE Linux Enterprise Debuginfo 11-SP3:zypper in -t patch
dbgsp3-xen-13259=1

To bring your system up-to-date, use 'zypper patch'.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 5.3
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: SuSE Local Security Checks

Nessus Plugin ID: 102954 ()

Bugtraq ID:

CVE ID: CVE-2017-10664
CVE-2017-11334
CVE-2017-11434
CVE-2017-12135
CVE-2017-12137
CVE-2017-12855

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