SUSE SLED15 / SLES15 Security Update : bind (SUSE-SU-2020:2914-1)

medium Nessus Plugin ID 143842

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Synopsis

The remote SUSE host is missing one or more security updates.

Description

This update for bind fixes the following issues :

BIND was upgraded to version 9.16.6 :

Note :

bind is now more strict in regards to DNSSEC. If queries are not working, check for DNSSEC issues. For instance, if bind is used in a namserver forwarder chain, the forwarding DNS servers must support DNSSEC.

Fixing security issues :

CVE-2020-8616: Further limit the number of queries that can be triggered from a request. Root and TLD servers are no longer exempt from max-recursion-queries. Fetches for missing name server.
(bsc#1171740) Address records are limited to 4 for any domain.

CVE-2020-8617: Replaying a TSIG BADTIME response as a request could trigger an assertion failure. (bsc#1171740)

CVE-2019-6477: Fixed an issue where TCP-pipelined queries could bypass the tcp-clients limit (bsc#1157051).

CVE-2018-5741: Fixed the documentation (bsc#1109160).

CVE-2020-8618: It was possible to trigger an INSIST when determining whether a record would fit into a TCP message buffer (bsc#1172958).

CVE-2020-8619: It was possible to trigger an INSIST in lib/dns/rbtdb.c:new_reference() with a particular zone content and query patterns (bsc#1172958).

CVE-2020-8624: 'update-policy' rules of type 'subdomain' were incorrectly treated as 'zonesub' rules, which allowed keys used in 'subdomain' rules to update names outside of the specified subdomains.
The problem was fixed by making sure 'subdomain' rules are again processed as described in the ARM (bsc#1175443).

CVE-2020-8623: When BIND 9 was compiled with native PKCS#11 support, it was possible to trigger an assertion failure in code determining the number of bits in the PKCS#11 RSA public key with a specially crafted packet (bsc#1175443).

CVE-2020-8621: named could crash in certain query resolution scenarios where QNAME minimization and forwarding were both enabled (bsc#1175443).

CVE-2020-8620: It was possible to trigger an assertion failure by sending a specially crafted large TCP DNS message (bsc#1175443).

CVE-2020-8622: It was possible to trigger an assertion failure when verifying the response to a TSIG-signed request (bsc#1175443).

Other issues fixed :

Add engine support to OpenSSL EdDSA implementation.

Add engine support to OpenSSL ECDSA implementation.

Update PKCS#11 EdDSA implementation to PKCS#11 v3.0.

Warn about AXFR streams with inconsistent message IDs.

Make ISC rwlock implementation the default again.

Fixed issues when using cookie-secrets for AES and SHA2 (bsc#1161168)

Installed the default files in /var/lib/named and created chroot environment on systems using transactional-updates (bsc#1100369, fate#325524)

Fixed an issue where bind was not working in FIPS mode (bsc#906079).

Fixed dependency issues (bsc#1118367 and bsc#1118368).

GeoIP support is now discontinued, now GeoIP2 is used(bsc#1156205).

Fixed an issue with FIPS (bsc#1128220).

The liblwres library is discontinued upstream and is no longer included.

Added service dependency on NTP to make sure the clock is accurate when bind is starts (bsc#1170667, bsc#1170713).

Reject DS records at the zone apex when loading master files. Log but otherwise ignore attempts to add DS records at the zone apex via UPDATE.

The default value of 'max-stale-ttl' has been changed from 1 week to 12 hours.

Zone timers are now exported via statistics channel.

The 'primary' and 'secondary' keywords, when used as parameters for 'check-names', were not processed correctly and were being ignored.

'rndc dnstap -roll <value>' did not limit the number of saved files to <value>.

Add 'rndc dnssec -status' command.

Addressed a couple of situations where named could crash.

Changed /var/lib/named to owner root:named and perms rwxrwxr-t so that named, being a/the only member of the 'named' group has full r/w access yet cannot change directories owned by root in the case of a compromized named. [bsc#1173307, bind-chrootenv.conf]

Added '/etc/bind.keys' to NAMED_CONF_INCLUDE_FILES in /etc/sysconfig/named to suppress warning message re missing file (bsc#1173983).

Removed '-r /dev/urandom' from all invocations of rndc-confgen (init/named system/lwresd.init system/named.init in vendor-files) as this option is deprecated and causes rndc-confgen to fail.
(bsc#1173311, bsc#1176674, bsc#1170713)

/usr/bin/genDDNSkey: Removing the use of the -r option in the call of /usr/sbin/dnssec-keygen as BIND now uses the random number functions provided by the crypto library (i.e., OpenSSL or a PKCS#11 provider) as a source of randomness rather than /dev/random. Therefore the -r command line option no longer has any effect on dnssec-keygen. Leaving the option in genDDNSkey as to not break compatibility. Patch provided by Stefan Eisenwiener. [bsc#1171313]

Put libns into a separate subpackage to avoid file conflicts in the libisc subpackage due to different sonums (bsc#1176092).

Require /sbin/start_daemon: both init scripts, the one used in systemd context as well as legacy sysv, make use of start_daemon.

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.

Solution

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server for SAP 15 :

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-2020-2914=1

SUSE Linux Enterprise Server 15-LTSS :

zypper in -t patch SUSE-SLE-Product-SLES-15-2020-2914=1

SUSE Linux Enterprise Module for Server Applications 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP2-2020-2914=1

SUSE Linux Enterprise Module for Server Applications 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP1-2020-2914=1

SUSE Linux Enterprise Module for Development Tools 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP2-2020-2914=1

SUSE Linux Enterprise Module for Basesystem 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP2-2020-2914=1

SUSE Linux Enterprise Module for Basesystem 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP1-2020-2914=1

SUSE Linux Enterprise High Performance Computing 15-LTSS :

zypper in -t patch SUSE-SLE-Product-HPC-15-2020-2914=1

SUSE Linux Enterprise High Performance Computing 15-ESPOS :

zypper in -t patch SUSE-SLE-Product-HPC-15-2020-2914=1

Plugin Details

Severity: Medium

ID: 143842

File Name: suse_SU-2020-2914-1.nasl

Version: 1.4

Type: local

Agent: unix

Family: SuSE Local Security Checks

Published: 12/9/2020

Updated: 5/11/2022

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3.1

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N

CVSS Score Source: CVE-2020-8624

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS Score Source: CVE-2018-5741

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:bind-debugsource, p-cpe:/a:novell:suse_linux:libirs1601-debuginfo, p-cpe:/a:novell:suse_linux:libdns1605, p-cpe:/a:novell:suse_linux:libirs-devel, p-cpe:/a:novell:suse_linux:bind-utils-debuginfo, p-cpe:/a:novell:suse_linux:libbind9-1600-debuginfo, p-cpe:/a:novell:suse_linux:libns1604-debuginfo, p-cpe:/a:novell:suse_linux:libisccfg1600-debuginfo, p-cpe:/a:novell:suse_linux:libisc1606-debuginfo, p-cpe:/a:novell:suse_linux:libisccc1600-debuginfo, p-cpe:/a:novell:suse_linux:libdns1605-debuginfo, p-cpe:/a:novell:suse_linux:libbind9, p-cpe:/a:novell:suse_linux:libns1604, p-cpe:/a:novell:suse_linux:bind-debuginfo, p-cpe:/a:novell:suse_linux:libisccc1600, p-cpe:/a:novell:suse_linux:libisc1606, p-cpe:/a:novell:suse_linux:libirs1601, cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:bind-chrootenv, p-cpe:/a:novell:suse_linux:bind-devel, p-cpe:/a:novell:suse_linux:bind, p-cpe:/a:novell:suse_linux:libisccfg1600, p-cpe:/a:novell:suse_linux:bind-utils

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/13/2020

Vulnerability Publication Date: 1/16/2019

Reference Information

CVE: CVE-2017-3136, CVE-2018-5741, CVE-2019-6477, CVE-2020-8616, CVE-2020-8617, CVE-2020-8618, CVE-2020-8619, CVE-2020-8620, CVE-2020-8621, CVE-2020-8622, CVE-2020-8623, CVE-2020-8624

Detections

Analytics

SUSE SLED15 / SLES15 Security Update : bind (SUSE-SU-2020:2914-1)

medium Nessus Plugin ID 143842

Synopsis

Description

Solution

See Also

Plugin Details

Risk Information

VPR

CVSS v2

CVSS v3

Vulnerability Information

Reference Information