Bugzilla – Bug 906439
VUL-0: CVE-2014-9030: XSA-113: xen: Guest effectable page reference leak in MMU_MACHPHYS_UPDATE handling
Last modified: 2016-11-22 17:19:47 UTC
Created attachment 614433 [details] xen-unstable, Xen 4.4.x, Xen 4.3.x, Xen 4.2.x ISSUE DESCRIPTION ================= An error handling path in the processing of MMU_MACHPHYS_UPDATE failed to drop a page reference which was acquired in an earlier processing step. IMPACT ====== Malicious or buggy stub domain kernels or tool stacks otherwise living outside of Domain0 can mount a denial of service attack which, if successful, can affect the whole system. Only domains controlling HVM guests can exploit this vulnerability. (This includes domains providing hardware emulation services to HVM guests.) VULNERABLE SYSTEMS ================== Xen versions from at least 3.2.x onwards are vulnerable on x86 systems. Older versions have not been inspected. ARM systems are not vulnerable. This vulnerability is only applicable to Xen systems using stub domains or other forms of disaggregation of control domains for HVM guests. MITIGATION ========== Running only PV guests will avoid this issue. (The security of a Xen system using stub domains is still better than with a qemu-dm running as an unrestricted dom0 process. Therefore users with these configurations should not switch to an unrestricted dom0 qemu-dm.) NOTE REGARDING LACK OF EMBARGO ============================== A draft of this advisory was mistakenly sent to xen-devel. The Xen Project Security Team apologises for this error. We are working to share best working practices amongst the team to reduce the risks of recurrance. CREDITS ======= This issue was discovered by Andrew Cooper of Citrix. RESOLUTION ========== Applying the attached patch resolves this issue. xsa113.patch xen-unstable, Xen 4.4.x, Xen 4.3.x, Xen 4.2.x $ sha256sum xsa113*.patch a0f2b792a6b4648151f85fe13961b0bf309a568ed03e1b1d4ea01e4eabf1b18e xsa113.patch
bugbot adjusting priority
Use CVE-2014-9030
Xen has been submitted with the following MR/SR numbers: SLE12: MR#46616 SLE11-SP3: SR#46617 SLE11-SP2: SR#46618 SLE11-SP1: SR#46619 SLE11-SP1-Teradata: SR#46622 SLE10-SP4: SR#46620 SLE10-SP3: SR#46621
SUSE-SU-2014:1691-1: An update that solves 5 vulnerabilities and has one errata is now available. Category: security (moderate) Bug References: 880751,895799,903850,903970,905467,906439 CVE References: CVE-2014-8594,CVE-2014-8595,CVE-2014-8866,CVE-2014-8867,CVE-2014-9030 Sources used: SUSE Linux Enterprise Server 10 SP4 LTSS (src): xen-3.2.3_17040_46-0.9.1
SUSE-SU-2014:1700-1: An update that solves 5 vulnerabilities and has 5 fixes is now available. Category: security (moderate) Bug References: 866902,882089,896023,901317,903850,903967,903970,905465,905467,906439 CVE References: CVE-2014-8594,CVE-2014-8595,CVE-2014-8866,CVE-2014-8867,CVE-2014-9030 Sources used: SUSE Linux Enterprise Software Development Kit 11 SP3 (src): xen-4.2.5_02-0.7.1 SUSE Linux Enterprise Server 11 SP3 (src): xen-4.2.5_02-0.7.1 SUSE Linux Enterprise Desktop 11 SP3 (src): xen-4.2.5_02-0.7.1
SUSE-SU-2014:1710-1: An update that solves 13 vulnerabilities and has two fixes is now available. Category: security (moderate) Bug References: 826717,867910,875668,880751,895798,895799,895802,897657,901317,903850,903967,903970,905465,905467,906439 CVE References: CVE-2013-3495,CVE-2014-2599,CVE-2014-3124,CVE-2014-4021,CVE-2014-7154,CVE-2014-7155,CVE-2014-7156,CVE-2014-7188,CVE-2014-8594,CVE-2014-8595,CVE-2014-8866,CVE-2014-8867,CVE-2014-9030 Sources used: SUSE Linux Enterprise Server 11 SP2 LTSS (src): xen-4.1.6_08-0.5.1
SUSE-SU-2014:1732-1: An update that fixes 9 vulnerabilities is now available. Category: security (moderate) Bug References: 826717,880751,895798,895799,895802,903967,903970,905467,906439 CVE References: CVE-2013-3495,CVE-2014-4021,CVE-2014-7154,CVE-2014-7155,CVE-2014-7156,CVE-2014-8594,CVE-2014-8595,CVE-2014-8867,CVE-2014-9030 Sources used: SUSE Linux Enterprise Server 11 SP1 LTSS (src): xen-4.0.3_21548_18-0.9.1
SUSE-SU-2015:0022-1: An update that solves 8 vulnerabilities and has 10 fixes is now available. Category: security (important) Bug References: 826717,866902,882089,889526,896023,897614,897906,898772,900292,901317,903357,903359,903850,903967,903970,905465,905467,906439 CVE References: CVE-2013-3495,CVE-2014-5146,CVE-2014-5149,CVE-2014-8594,CVE-2014-8595,CVE-2014-8866,CVE-2014-8867,CVE-2014-9030 Sources used: SUSE Linux Enterprise Software Development Kit 12 (src): xen-4.4.1_08-5.2 SUSE Linux Enterprise Server 12 (src): xen-4.4.1_08-5.2 SUSE Linux Enterprise Desktop 12 (src): xen-4.4.1_08-5.2
openSUSE-SU-2015:0226-1: An update that solves 11 vulnerabilities and has 5 fixes is now available. Category: security (important) Bug References: 826717,866902,882089,889526,900292,901317,903357,903359,903850,903967,903970,905465,905467,906439,906996,910681 CVE References: CVE-2013-3495,CVE-2014-5146,CVE-2014-5149,CVE-2014-8594,CVE-2014-8595,CVE-2014-8866,CVE-2014-8867,CVE-2014-9030,CVE-2014-9065,CVE-2014-9066,CVE-2015-0361 Sources used: openSUSE 13.1 (src): xen-4.3.3_04-34.1
13.2 open, but well lets close
openSUSE-SU-2015:0256-1: An update that solves 11 vulnerabilities and has 9 fixes is now available. Category: security (important) Bug References: 826717,866902,882089,889526,896023,897906,898772,900292,901317,903357,903359,903850,903967,903970,904255,905465,905467,906439,906996,910681 CVE References: CVE-2013-3495,CVE-2014-5146,CVE-2014-5149,CVE-2014-8594,CVE-2014-8595,CVE-2014-8866,CVE-2014-8867,CVE-2014-9030,CVE-2014-9065,CVE-2014-9066,CVE-2015-0361 Sources used: openSUSE 13.2 (src): xen-4.4.1_08-9.1