Upstream information

CVE-2018-15470 at MITRE

Description

An issue was discovered in Xen through 4.11.x. The logic in oxenstored for handling writes depended on the order of evaluation of expressions making up a tuple. As indicated in section 7.7.3 "Operations on data structures" of the OCaml manual, the order of evaluation of subexpressions is not specified. In practice, different implementations behave differently. Thus, oxenstored may not enforce the configured quota-maxentity. This allows a malicious or buggy guest to write as many xenstore entries as it wishes, causing unbounded memory usage in oxenstored. This can lead to a system-wide DoS.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 4.9
Vector AV:L/AC:L/Au:N/C:N/I:N/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
CVSS v3 Scores
  National Vulnerability Database
Base Score 6.5
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Access Vector Local
Access Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact None
Integrity Impact None
Availability Impact High
CVSSv3 Version 3
SUSE Bugzilla entry: 1103279 [RESOLVED / INVALID]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
Image SLES15-EC2-CHOST-HVM-BYOS
  • xen-libs >= 4.10.2_04-3.9.1
  • xen-tools-domU >= 4.10.2_04-3.9.1
SUSE CaaS Platform 3.0
  • xen >= 4.9.3_03-3.44.2
  • xen-libs >= 4.9.3_03-3.44.2
  • xen-tools-domU >= 4.9.3_03-3.44.2
 Patchnames:
SUSE-CAASP-3.0-2018-2492
SUSE CaaS Platform ALL
  • xen >= 4.9.3_03-3.44.2
  • xen-libs >= 4.9.3_03-3.44.2
  • xen-tools-domU >= 4.9.3_03-3.44.2
 Patchnames:
SUSE-CAASP-ALL-2018-2492
SUSE Linux Enterprise Desktop 12 SP3
  • xen >= 4.9.3_03-3.44.2
  • xen-libs >= 4.9.3_03-3.44.2
  • xen-libs-32bit >= 4.9.3_03-3.44.2
 Patchnames:
SUSE-SLE-DESKTOP-12-SP3-2018-2492
SUSE Linux Enterprise Desktop 12 SP4
  • xen >= 4.11.0_08-1.11
  • xen-libs >= 4.11.0_08-1.11
  • xen-libs-32bit >= 4.11.0_08-1.11
SUSE Linux Enterprise High Performance Computing 12 SP5
SUSE Linux Enterprise Server 12 SP5
  • xen >= 4.12.1_06-1.1
  • xen-doc-html >= 4.12.1_06-1.1
  • xen-libs >= 4.12.1_06-1.1
  • xen-libs-32bit >= 4.12.1_06-1.1
  • xen-tools >= 4.12.1_06-1.1
  • xen-tools-domU >= 4.12.1_06-1.1
SUSE Linux Enterprise Module for Basesystem 15 SP1
  • xen-libs >= 4.12.0_12-1.1
  • xen-tools-domU >= 4.12.0_12-1.1
SUSE Linux Enterprise Module for Basesystem 15
  • xen >= 4.10.2_04-3.9.1
  • xen-libs >= 4.10.2_04-3.9.1
  • xen-tools-domU >= 4.10.2_04-3.9.1
 Patchnames:
SUSE-SLE-Module-Basesystem-15-2018-3063
SUSE Linux Enterprise Module for Server Applications 15 SP1
  • xen >= 4.12.0_12-1.1
  • xen-devel >= 4.12.0_12-1.1
  • xen-tools >= 4.12.0_12-1.1
SUSE Linux Enterprise Module for Server Applications 15
  • xen >= 4.10.2_04-3.9.1
  • xen-devel >= 4.10.2_04-3.9.1
  • xen-tools >= 4.10.2_04-3.9.1
 Patchnames:
SUSE-SLE-Module-Server-Applications-15-2018-3063
SUSE Linux Enterprise Server 12 SP3
SUSE Linux Enterprise Server for SAP Applications 12 SP3
  • xen >= 4.9.3_03-3.44.2
  • xen-doc-html >= 4.9.3_03-3.44.2
  • xen-libs >= 4.9.3_03-3.44.2
  • xen-libs-32bit >= 4.9.3_03-3.44.2
  • xen-tools >= 4.9.3_03-3.44.2
  • xen-tools-domU >= 4.9.3_03-3.44.2
 Patchnames:
SUSE-SLE-SERVER-12-SP3-2018-2492
SUSE Linux Enterprise Server 12 SP4
  • xen >= 4.11.0_08-1.11
  • xen-doc-html >= 4.11.0_08-1.11
  • xen-libs >= 4.11.0_08-1.11
  • xen-libs-32bit >= 4.11.0_08-1.11
  • xen-tools >= 4.11.0_08-1.11
  • xen-tools-domU >= 4.11.0_08-1.11
SUSE Linux Enterprise Software Development Kit 12 SP3
  • xen >= 4.9.3_03-3.44.2
  • xen-devel >= 4.9.3_03-3.44.2
 Patchnames:
SUSE-SLE-SDK-12-SP3-2018-2492
SUSE Linux Enterprise Software Development Kit 12 SP4
  • xen-devel >= 4.11.0_08-1.11
SUSE Linux Enterprise Software Development Kit 12 SP5
  • xen-devel >= 4.12.1_06-1.1
openSUSE Leap 15.0
  • xen >= 4.10.2_04-lp150.2.12.1
  • xen-debugsource >= 4.10.2_04-lp150.2.12.1
  • xen-devel >= 4.10.2_04-lp150.2.12.1
  • xen-doc-html >= 4.10.2_04-lp150.2.12.1
  • xen-libs >= 4.10.2_04-lp150.2.12.1
  • xen-libs-32bit >= 4.10.2_04-lp150.2.12.1
  • xen-libs-32bit-debuginfo >= 4.10.2_04-lp150.2.12.1
  • xen-libs-debuginfo >= 4.10.2_04-lp150.2.12.1
  • xen-tools >= 4.10.2_04-lp150.2.12.1
  • xen-tools-debuginfo >= 4.10.2_04-lp150.2.12.1
  • xen-tools-domU >= 4.10.2_04-lp150.2.12.1
  • xen-tools-domU-debuginfo >= 4.10.2_04-lp150.2.12.1
 Patchnames:
openSUSE-2019-1046
openSUSE Leap 42.3
  • xen >= 4.9.3_03-31.1
  • xen-debugsource >= 4.9.3_03-31.1
  • xen-devel >= 4.9.3_03-31.1
  • xen-doc-html >= 4.9.3_03-31.1
  • xen-libs >= 4.9.3_03-31.1
  • xen-libs-debuginfo >= 4.9.3_03-31.1
  • xen-tools >= 4.9.3_03-31.1
  • xen-tools-debuginfo >= 4.9.3_03-31.1
  • xen-tools-domU >= 4.9.3_03-31.1
  • xen-tools-domU-debuginfo >= 4.9.3_03-31.1
 Patchnames:
openSUSE-2018-1331

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 2.0 xen Released
CaaS Platform 3.0 xen Released
SUSE Linux Enterprise Desktop 12 SP3 xen Released
SUSE Linux Enterprise Module for Basesystem 15 GA xen Released
SUSE Linux Enterprise Module for Server Applications 15 GA xen Released
SUSE Linux Enterprise SDK 11 SP4 xen Not affected
SUSE Linux Enterprise SDK 12 SP3 xen Released
SUSE Linux Enterprise Server 11 SP4 xen Not affected
SUSE Linux Enterprise Server 12 SP3 xen Released