Upstream information

CVE-2020-8616 at MITRE

Description

A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.

SUSE information

Overall state of this security issue: Analysis

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 5
Vector AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 8.6 8.6
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Access Vector Network Network
Access Complexity Low Low
Privileges Required None None
User Interaction None None
Scope Changed Changed
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1171740 [IN_PROGRESS]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Linux Enterprise Server 12 SP4
SUSE Linux Enterprise Server for SAP Applications 12 SP4
  • bind >= 9.11.2-3.17.1
  • bind-chrootenv >= 9.11.2-3.17.1
  • bind-doc >= 9.11.2-3.17.1
  • bind-utils >= 9.11.2-3.17.1
  • libbind9-160 >= 9.11.2-3.17.1
  • libdns169 >= 9.11.2-3.17.1
  • libirs160 >= 9.11.2-3.17.1
  • libisc166 >= 9.11.2-3.17.1
  • libisc166-32bit >= 9.11.2-3.17.1
  • libisccc160 >= 9.11.2-3.17.1
  • libisccfg160 >= 9.11.2-3.17.1
  • liblwres160 >= 9.11.2-3.17.1
  • python-bind >= 9.11.2-3.17.1
 Patchnames:
SUSE-SLE-SERVER-12-SP4-2020-1350
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP5
  • bind >= 9.11.2-3.17.1
  • bind-chrootenv >= 9.11.2-3.17.1
  • bind-doc >= 9.11.2-3.17.1
  • bind-utils >= 9.11.2-3.17.1
  • libbind9-160 >= 9.11.2-3.17.1
  • libdns169 >= 9.11.2-3.17.1
  • libirs160 >= 9.11.2-3.17.1
  • libisc166 >= 9.11.2-3.17.1
  • libisc166-32bit >= 9.11.2-3.17.1
  • libisccc160 >= 9.11.2-3.17.1
  • libisccfg160 >= 9.11.2-3.17.1
  • liblwres160 >= 9.11.2-3.17.1
  • python-bind >= 9.11.2-3.17.1
 Patchnames:
SUSE-SLE-SERVER-12-SP5-2020-1350
SUSE Linux Enterprise Software Development Kit 12 SP4
  • bind >= 9.11.2-3.17.1
  • bind-devel >= 9.11.2-3.17.1
 Patchnames:
SUSE-SLE-SDK-12-SP4-2020-1350
SUSE Linux Enterprise Software Development Kit 12 SP5
  • bind >= 9.11.2-3.17.1
  • bind-devel >= 9.11.2-3.17.1
 Patchnames:
SUSE-SLE-SDK-12-SP5-2020-1350

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise High Performance Computing 15-ESPOS
  • bind >= 9.16.3-12.26.1
  • bind-chrootenv >= 9.16.3-12.26.1
  • bind-debuginfo >= 9.16.3-12.26.1
  • bind-debugsource >= 9.16.3-12.26.1
  • bind-devel >= 9.16.3-12.26.1
  • bind-doc >= 9.16.3-12.26.1
  • bind-utils >= 9.16.3-12.26.1
  • bind-utils-debuginfo >= 9.16.3-12.26.1
  • libbind9-1600 >= 9.16.3-12.26.1
  • libbind9-1600-debuginfo >= 9.16.3-12.26.1
  • libdns1603 >= 9.16.3-12.26.1
  • libdns1603-debuginfo >= 9.16.3-12.26.1
  • libirs-devel >= 9.16.3-12.26.1
  • libirs1601 >= 9.16.3-12.26.1
  • libirs1601-debuginfo >= 9.16.3-12.26.1
  • libisc1603 >= 9.16.3-12.26.1
  • libisc1603-debuginfo >= 9.16.3-12.26.1
  • libisccc1600 >= 9.16.3-12.26.1
  • libisccc1600-debuginfo >= 9.16.3-12.26.1
  • libisccfg1600 >= 9.16.3-12.26.1
  • libisccfg1600-debuginfo >= 9.16.3-12.26.1
  • python3-bind >= 9.16.3-12.26.1
  • sysuser-shadow >= 2.0-4.2.3
  • sysuser-tools >= 2.0-4.2.3
SUSE Linux Enterprise High Performance Computing 15-LTSS
  • bind >= 9.16.3-12.26.1
  • bind-chrootenv >= 9.16.3-12.26.1
  • bind-debuginfo >= 9.16.3-12.26.1
  • bind-debugsource >= 9.16.3-12.26.1
  • bind-devel >= 9.16.3-12.26.1
  • bind-doc >= 9.16.3-12.26.1
  • bind-utils >= 9.16.3-12.26.1
  • bind-utils-debuginfo >= 9.16.3-12.26.1
  • libbind9-1600 >= 9.16.3-12.26.1
  • libbind9-1600-debuginfo >= 9.16.3-12.26.1
  • libdns1603 >= 9.16.3-12.26.1
  • libdns1603-debuginfo >= 9.16.3-12.26.1
  • libirs-devel >= 9.16.3-12.26.1
  • libirs1601 >= 9.16.3-12.26.1
  • libirs1601-debuginfo >= 9.16.3-12.26.1
  • libisc1603 >= 9.16.3-12.26.1
  • libisc1603-debuginfo >= 9.16.3-12.26.1
  • libisccc1600 >= 9.16.3-12.26.1
  • libisccc1600-debuginfo >= 9.16.3-12.26.1
  • libisccfg1600 >= 9.16.3-12.26.1
  • libisccfg1600-debuginfo >= 9.16.3-12.26.1
  • python3-bind >= 9.16.3-12.26.1
  • sysuser-shadow >= 2.0-4.2.3
  • sysuser-tools >= 2.0-4.2.3
SUSE Linux Enterprise Module for Basesystem 15 SP1
  • bind >= 9.16.3-12.26.1
  • bind-debuginfo >= 9.16.3-12.26.1
  • bind-debugsource >= 9.16.3-12.26.1
  • bind-devel >= 9.16.3-12.26.1
  • bind-utils >= 9.16.3-12.26.1
  • bind-utils-debuginfo >= 9.16.3-12.26.1
  • libbind9-1600 >= 9.16.3-12.26.1
  • libbind9-1600-debuginfo >= 9.16.3-12.26.1
  • libdns1603 >= 9.16.3-12.26.1
  • libdns1603-debuginfo >= 9.16.3-12.26.1
  • libirs-devel >= 9.16.3-12.26.1
  • libirs1601 >= 9.16.3-12.26.1
  • libirs1601-debuginfo >= 9.16.3-12.26.1
  • libisc1603 >= 9.16.3-12.26.1
  • libisc1603-debuginfo >= 9.16.3-12.26.1
  • libisccc1600 >= 9.16.3-12.26.1
  • libisccc1600-debuginfo >= 9.16.3-12.26.1
  • libisccfg1600 >= 9.16.3-12.26.1
  • libisccfg1600-debuginfo >= 9.16.3-12.26.1
  • python3-bind >= 9.16.3-12.26.1
  • sysuser-shadow >= 2.0-4.2.3
  • sysuser-tools >= 2.0-4.2.3
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP1
  • bind >= 9.16.3-12.26.1
  • bind-debuginfo >= 9.16.3-12.26.1
  • bind-debugsource >= 9.16.3-12.26.1
  • bind-devel-32bit >= 9.16.3-12.26.1
  • libbind9-1600-32bit >= 9.16.3-12.26.1
  • libbind9-1600-32bit-debuginfo >= 9.16.3-12.26.1
  • libdns1603-32bit >= 9.16.3-12.26.1
  • libdns1603-32bit-debuginfo >= 9.16.3-12.26.1
  • libirs1601-32bit >= 9.16.3-12.26.1
  • libirs1601-32bit-debuginfo >= 9.16.3-12.26.1
  • libisc1603-32bit >= 9.16.3-12.26.1
  • libisc1603-32bit-debuginfo >= 9.16.3-12.26.1
  • libisccc1600-32bit >= 9.16.3-12.26.1
  • libisccc1600-32bit-debuginfo >= 9.16.3-12.26.1
  • libisccfg1600-32bit >= 9.16.3-12.26.1
  • libisccfg1600-32bit-debuginfo >= 9.16.3-12.26.1
  • sysuser-tools >= 2.0-4.2.3
SUSE Linux Enterprise Module for Server Applications 15 SP1
  • bind >= 9.16.3-12.26.1
  • bind-chrootenv >= 9.16.3-12.26.1
  • bind-debuginfo >= 9.16.3-12.26.1
  • bind-debugsource >= 9.16.3-12.26.1
  • bind-doc >= 9.16.3-12.26.1
SUSE Linux Enterprise Server 15-LTSS
  • bind >= 9.16.3-12.26.1
  • bind-chrootenv >= 9.16.3-12.26.1
  • bind-debuginfo >= 9.16.3-12.26.1
  • bind-debugsource >= 9.16.3-12.26.1
  • bind-devel >= 9.16.3-12.26.1
  • bind-doc >= 9.16.3-12.26.1
  • bind-utils >= 9.16.3-12.26.1
  • bind-utils-debuginfo >= 9.16.3-12.26.1
  • libbind9-1600 >= 9.16.3-12.26.1
  • libbind9-1600-debuginfo >= 9.16.3-12.26.1
  • libdns1603 >= 9.16.3-12.26.1
  • libdns1603-debuginfo >= 9.16.3-12.26.1
  • libirs-devel >= 9.16.3-12.26.1
  • libirs1601 >= 9.16.3-12.26.1
  • libirs1601-debuginfo >= 9.16.3-12.26.1
  • libisc1603 >= 9.16.3-12.26.1
  • libisc1603-debuginfo >= 9.16.3-12.26.1
  • libisccc1600 >= 9.16.3-12.26.1
  • libisccc1600-debuginfo >= 9.16.3-12.26.1
  • libisccfg1600 >= 9.16.3-12.26.1
  • libisccfg1600-debuginfo >= 9.16.3-12.26.1
  • python3-bind >= 9.16.3-12.26.1
  • sysuser-shadow >= 2.0-4.2.3
  • sysuser-tools >= 2.0-4.2.3
SUSE Linux Enterprise Server for SAP Applications 15
  • bind >= 9.16.3-12.26.1
  • bind-chrootenv >= 9.16.3-12.26.1
  • bind-debuginfo >= 9.16.3-12.26.1
  • bind-debugsource >= 9.16.3-12.26.1
  • bind-devel >= 9.16.3-12.26.1
  • bind-doc >= 9.16.3-12.26.1
  • bind-utils >= 9.16.3-12.26.1
  • bind-utils-debuginfo >= 9.16.3-12.26.1
  • libbind9-1600 >= 9.16.3-12.26.1
  • libbind9-1600-debuginfo >= 9.16.3-12.26.1
  • libdns1603 >= 9.16.3-12.26.1
  • libdns1603-debuginfo >= 9.16.3-12.26.1
  • libirs-devel >= 9.16.3-12.26.1
  • libirs1601 >= 9.16.3-12.26.1
  • libirs1601-debuginfo >= 9.16.3-12.26.1
  • libisc1603 >= 9.16.3-12.26.1
  • libisc1603-debuginfo >= 9.16.3-12.26.1
  • libisccc1600 >= 9.16.3-12.26.1
  • libisccc1600-debuginfo >= 9.16.3-12.26.1
  • libisccfg1600 >= 9.16.3-12.26.1
  • libisccfg1600-debuginfo >= 9.16.3-12.26.1
  • python3-bind >= 9.16.3-12.26.1
  • sysuser-shadow >= 2.0-4.2.3
  • sysuser-tools >= 2.0-4.2.3

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 3.0 bind Affected
SUSE Business Critical Linux 12 SP2 bind Affected
SUSE Business Critical Linux 12 SP3 bind Affected
SUSE Linux Enterprise High Performance Computing 12 bind Released
SUSE Linux Enterprise High Performance Computing ESPOS 15 GA bind In progress
SUSE Linux Enterprise High Performance Computing LTSS 15 GA bind In progress
SUSE Linux Enterprise Module for Basesystem 15 SP1 bind In progress
SUSE Linux Enterprise Module for Server Applications 15 SP1 bind In progress
SUSE Linux Enterprise SDK 12 SP4 bind Released
SUSE Linux Enterprise SDK 12 SP5 bind Released
SUSE Linux Enterprise Server 11 SP4 LTSS bind Affected
SUSE Linux Enterprise Server 12 SP1 LTSS bind Affected
SUSE Linux Enterprise Server 12 SP2 LTSS bind Affected
SUSE Linux Enterprise Server 12 SP3 LTSS bind Affected
SUSE Linux Enterprise Server 12 SP4 bind Released
SUSE Linux Enterprise Server 12 SP5 bind Released
SUSE Linux Enterprise Server 15 GA LTSS bind In progress
SUSE Linux Enterprise Server for SAP Applications 12 SP2 bind Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3 bind Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4 bind Released
SUSE Linux Enterprise Server for SAP Applications 12 SP5 bind Released