SUSE SLES11 Security Update : xen (SUSE-SU-2017:2450-1)

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 several issues. These security issues were
fixed :

- 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-2017-10806: Stack-based buffer overflow in
hw/usb/redirect.c allowed local guest OS users to cause
a denial of service via vectors related to logging debug
messages (bsc#1047675).

- 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).

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

- CVE-2017-14316: Missing bound check in function
`alloc_heap_pages` for an internal array allowed
attackers using crafted hypercalls to execute arbitrary
code within Xen (XSA-231, bsc#1056278)

- CVE-2017-14317: A race in cxenstored may have cause a
double-free allowind for DoS of the xenstored daemon
(XSA-233, bsc#1056281).

- CVE-2017-14319: An error while handling grant mappings
allowed malicious or buggy x86 PV guest to escalate its
privileges or crash the hypervisor (XSA-234,
bsc#1056282). This non-security issue was fixed :

- bsc#1032598: Prevent removal of NVME devices

- bsc#1037413: Support for newer intel cpu's, mwait-idle
driver and skylake

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/1027519
https://bugzilla.suse.com/1032598
https://bugzilla.suse.com/1037413
https://bugzilla.suse.com/1046637
https://bugzilla.suse.com/1047675
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://bugzilla.suse.com/1056278
https://bugzilla.suse.com/1056281
https://bugzilla.suse.com/1056282
https://www.suse.com/security/cve/CVE-2017-10664.html
https://www.suse.com/security/cve/CVE-2017-10806.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
https://www.suse.com/security/cve/CVE-2017-14316.html
https://www.suse.com/security/cve/CVE-2017-14317.html
https://www.suse.com/security/cve/CVE-2017-14319.html
http://www.nessus.org/u?bead5cfa

Solution :

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

SUSE Linux Enterprise Software Development Kit 11-SP4:zypper in -t
patch sdksp4-xen-13281=1

SUSE Linux Enterprise Server 11-SP4:zypper in -t patch
slessp4-xen-13281=1

SUSE Linux Enterprise Debuginfo 11-SP4:zypper in -t patch
dbgsp4-xen-13281=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

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