Upstream information

CVE-2017-12855 at MITRE

Description

Xen maintains the _GTF_{read,writ}ing bits as appropriate, to inform the guest that a grant is in use. A guest is expected not to modify the grant details while it is in use, whereas the guest is free to modify/reuse the grant entry when it is not in use. Under some circumstances, Xen will clear the status bits too early, incorrectly informing the guest that the grant is no longer in use. A guest may prematurely believe that a granted frame is safely private again, and reuse it in a way which contains sensitive information, while the domain on the far end of the grant is still using the grant. Xen 4.9, 4.8, 4.7, 4.6, and 4.5 are affected.

SUSE information

Overall state of this security issue: Running

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 2.1
Vector AV:L/AC:L/Au:N/C:P/I:N/A:N
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None
SUSE Bugzilla entry: 1052686 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE CaaS Platform ALL
  • xen >= 4.7.3_03-43.9.1
  • xen-libs >= 4.7.3_03-43.9.1
  • xen-tools-domU >= 4.7.3_03-43.9.1
Patchnames:
SUSE-CAASP-ALL-2017-1438
SUSE Linux Enterprise Desktop 12 SP2
  • xen >= 4.7.3_03-43.9.1
  • xen-libs >= 4.7.3_03-43.9.1
  • xen-libs-32bit >= 4.7.3_03-43.9.1
Patchnames:
SUSE-SLE-DESKTOP-12-SP2-2017-1438
SUSE Linux Enterprise Desktop 12 SP3
  • xen >= 4.9.0_11-3.9.1
  • xen-libs >= 4.9.0_11-3.9.1
  • xen-libs-32bit >= 4.9.0_11-3.9.1
Patchnames:
SUSE-SLE-DESKTOP-12-SP3-2017-1437
SUSE Linux Enterprise Point of Sale 11 SP3
  • xen >= 4.2.5_21-45.5.1
  • xen-kmp-default >= 4.2.5_21_3.0.101_0.47.105-45.5.1
  • xen-kmp-pae >= 4.2.5_21_3.0.101_0.47.105-45.5.1
  • xen-libs >= 4.2.5_21-45.5.1
  • xen-tools-domU >= 4.2.5_21-45.5.1
Patchnames:
sleposp3-xen-13259
SUSE Linux Enterprise Server 11 SP3-LTSS
  • xen >= 4.2.5_21-45.5.1
  • xen-doc-html >= 4.2.5_21-45.5.1
  • xen-doc-pdf >= 4.2.5_21-45.5.1
  • xen-kmp-default >= 4.2.5_21_3.0.101_0.47.105-45.5.1
  • xen-kmp-pae >= 4.2.5_21_3.0.101_0.47.105-45.5.1
  • xen-libs >= 4.2.5_21-45.5.1
  • xen-libs-32bit >= 4.2.5_21-45.5.1
  • xen-tools >= 4.2.5_21-45.5.1
  • xen-tools-domU >= 4.2.5_21-45.5.1
Patchnames:
slessp3-xen-13259
SUSE Linux Enterprise Server 11 SP4
  • xen >= 4.4.4_22-61.9.2
  • xen-doc-html >= 4.4.4_22-61.9.2
  • xen-kmp-default >= 4.4.4_22_3.0.101_108.7-61.9.2
  • xen-kmp-pae >= 4.4.4_22_3.0.101_108.7-61.9.2
  • xen-libs >= 4.4.4_22-61.9.2
  • xen-libs-32bit >= 4.4.4_22-61.9.2
  • xen-tools >= 4.4.4_22-61.9.2
  • xen-tools-domU >= 4.4.4_22-61.9.2
Patchnames:
slessp4-xen-13281
SUSE Linux Enterprise Server 12 SP2
  • xen >= 4.7.3_03-43.9.1
  • xen-doc-html >= 4.7.3_03-43.9.1
  • xen-libs >= 4.7.3_03-43.9.1
  • xen-libs-32bit >= 4.7.3_03-43.9.1
  • xen-tools >= 4.7.3_03-43.9.1
  • xen-tools-domU >= 4.7.3_03-43.9.1
Patchnames:
SUSE-SLE-SERVER-12-SP2-2017-1438
SUSE Linux Enterprise Server 12 SP3
  • xen >= 4.9.0_11-3.9.1
  • xen-doc-html >= 4.9.0_11-3.9.1
  • xen-libs >= 4.9.0_11-3.9.1
  • xen-libs-32bit >= 4.9.0_11-3.9.1
  • xen-tools >= 4.9.0_11-3.9.1
  • xen-tools-domU >= 4.9.0_11-3.9.1
Patchnames:
SUSE-SLE-SERVER-12-SP3-2017-1437
SUSE Linux Enterprise Server 12-LTSS
  • xen >= 4.4.4_22-22.51.2
  • xen-doc-html >= 4.4.4_22-22.51.2
  • xen-kmp-default >= 4.4.4_22_k3.12.61_52.89-22.51.2
  • xen-libs >= 4.4.4_22-22.51.2
  • xen-libs-32bit >= 4.4.4_22-22.51.2
  • xen-tools >= 4.4.4_22-22.51.2
  • xen-tools-domU >= 4.4.4_22-22.51.2
Patchnames:
SUSE-SLE-SERVER-12-2017-1576
SUSE Linux Enterprise Software Development Kit 11 SP4
  • xen >= 4.4.4_22-61.9.2
  • xen-devel >= 4.4.4_22-61.9.2
Patchnames:
sdksp4-xen-13281
SUSE Linux Enterprise Software Development Kit 12 SP2
  • xen >= 4.7.3_03-43.9.1
  • xen-devel >= 4.7.3_03-43.9.1
Patchnames:
SUSE-SLE-SDK-12-SP2-2017-1438
SUSE Linux Enterprise Software Development Kit 12 SP3
  • xen >= 4.9.0_11-3.9.1
  • xen-devel >= 4.9.0_11-3.9.1
Patchnames:
SUSE-SLE-SDK-12-SP3-2017-1437
SUSE Linux Enterprise for SAP 12
  • xen >= 4.4.4_22-22.51.2
  • xen-doc-html >= 4.4.4_22-22.51.2
  • xen-kmp-default >= 4.4.4_22_k3.12.61_52.89-22.51.2
  • xen-libs >= 4.4.4_22-22.51.2
  • xen-libs-32bit >= 4.4.4_22-22.51.2
  • xen-tools >= 4.4.4_22-22.51.2
  • xen-tools-domU >= 4.4.4_22-22.51.2
Patchnames:
SUSE-SLE-SAP-12-2017-1576
openSUSE Leap 42.2
  • xen >= 4.7.3_03-11.12.1
  • xen-debugsource >= 4.7.3_03-11.12.1
  • xen-devel >= 4.7.3_03-11.12.1
  • xen-doc-html >= 4.7.3_03-11.12.1
  • xen-libs >= 4.7.3_03-11.12.1
  • xen-libs-32bit >= 4.7.3_03-11.12.1
  • xen-libs-debuginfo >= 4.7.3_03-11.12.1
  • xen-libs-debuginfo-32bit >= 4.7.3_03-11.12.1
  • xen-tools >= 4.7.3_03-11.12.1
  • xen-tools-debuginfo >= 4.7.3_03-11.12.1
  • xen-tools-domU >= 4.7.3_03-11.12.1
  • xen-tools-domU-debuginfo >= 4.7.3_03-11.12.1
Patchnames:
openSUSE-2017-1022
openSUSE Leap 42.3
  • xen >= 4.9.0_11-4.1
  • xen-debugsource >= 4.9.0_11-4.1
  • xen-devel >= 4.9.0_11-4.1
  • xen-doc-html >= 4.9.0_11-4.1
  • xen-libs >= 4.9.0_11-4.1
  • xen-libs-debuginfo >= 4.9.0_11-4.1
  • xen-tools >= 4.9.0_11-4.1
  • xen-tools-debuginfo >= 4.9.0_11-4.1
  • xen-tools-domU >= 4.9.0_11-4.1
  • xen-tools-domU-debuginfo >= 4.9.0_11-4.1
Patchnames:
openSUSE-2017-1023


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
CaaS Platform 1.0 xen Affected
CaaS Platform 2.0 xen Affected
SUSE Linux Enterprise Desktop 12 SP2 xen Released
SUSE Linux Enterprise Desktop 12 SP3 xen Affected
SUSE Linux Enterprise SDK 11 SP4 xen Released
SUSE Linux Enterprise SDK 12 SP2 xen Released
SUSE Linux Enterprise SDK 12 SP3 xen Affected
SUSE Linux Enterprise Server 11 SP3 LTSS xen Released
SUSE Linux Enterprise Server 11 SP4 xen Released
SUSE Linux Enterprise Server 12 GA LTSS xen Released
SUSE Linux Enterprise Server 12 SP1 LTSS xen Released
SUSE Linux Enterprise Server 12 SP2 xen Released
SUSE Linux Enterprise Server 12 SP3 xen Affected