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.

ISC reports :

The asterisk character ('*') is allowed in DNS zone files, where it is most commonly present as a wildcard at a terminal node of the Domain Name System graph. However, the RFCs do not require and BIND does not enforce that an asterisk character be present only at a terminal node.

A problem can occur when an asterisk is present in an empty non-terminal location within the DNS graph. If such a node exists, after a series of queries, named can reach an inconsistent state that results in the failure of an assertion check in rbtdb.c, followed by the program exiting due to the assertion failure.

The version of ISC BIND installed on the remote host is affected by a denial of service (DoS) vulnerability in   rbtdb.c due to an assertion failure. An authenticated, remote attacker can exploit this issue, to cause a DoS   condition. 

  Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported   version

An update of the bindutils package has been released.

According to the versions of the bind packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 ->     9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the     BIND 9 Supported Preview Edition, An attacker that can     reach a vulnerable system with a specially crafted     query packet can trigger a crash. To be vulnerable, the     system must: * be running BIND that was built with     '--enable-native-pkcs11' * be signing one or more zones     with an RSA key * be able to receive queries from a     possible attacker(CVE-2020-8623)

  - In BIND 9.9.12 -> 9.9.13, 9.10.7 -> 9.10.8, 9.11.3 ->     9.11.21, 9.12.1 -> 9.16.5, 9.17.0 -> 9.17.3, also     affects 9.9.12-S1 -> 9.9.13-S1, 9.11.3-S1 -> 9.11.21-S1     of the BIND 9 Supported Preview Edition, An attacker     who has been granted privileges to change a specific     subset of the zone's content could abuse these     unintended additional privileges to update other     contents of the zone.(CVE-2020-8624)

  - In ISC BIND9 versions BIND 9.11.14 -> 9.11.19, BIND     9.14.9 -> 9.14.12, BIND 9.16.0 -> 9.16.3, BIND     Supported Preview Edition 9.11.14-S1 -> 9.11.19-S1:
    Unless a nameserver is providing authoritative service     for one or more zones and at least one zone contains an     empty non-terminal entry containing an asterisk ('*')     character, this defect cannot be encountered. A     would-be attacker who is allowed to change zone content     could theoretically introduce such a record in order to     exploit this condition to cause denial of service,     though we consider the use of this vector unlikely     because any such attack would require a significant     privilege level and be easily traceable.(CVE-2020-8619)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the bind packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in bind when an asterisk character is     present in an empty non-terminal location within the     DNS graph. This flaw could trigger an assertion     failure, causing bind to crash. The highest threat from     this vulnerability is to system     availability.(CVE-2020-8619)

  - BIND servers are vulnerable if they are running an     affected version and are configured to use GSS-TSIG     features. In a configuration which uses BIND's default     settings the vulnerable code path is not exposed, but a     server can be rendered vulnerable by explicitly setting     valid values for the tkey-gssapi-keytab or     tkey-gssapi-credentialconfiguration options. Although     the default configuration is not vulnerable, GSS-TSIG     is frequently used in networks where BIND is integrated     with Samba, as well as in mixed-server environments     that combine BIND servers with Active Directory domain     controllers. The most likely outcome of a successful     exploitation of the vulnerability is a crash of the     named process. However, remote code execution, while     unproven, is theoretically possible. Affects: BIND     9.5.0 -> 9.11.27, 9.12.0 -> 9.16.11, and versions BIND     9.11.3-S1 -> 9.11.27-S1 and 9.16.8-S1 -> 9.16.11-S1 of     BIND Supported Preview Edition. Also release versions     9.17.0 -> 9.17.1 of the BIND 9.17 development     branch(CVE-2020-8625)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
143842	SUSE SLED15 / SLES15 Security Update : bind (SUSE-SU-2020:2914-1)	Nessus	SuSE Local Security Checks	2020/12/9	2022/5/11	medium
137692	FreeBSD : BIND -- Remote Denial of Service vulnerability (f00d1873-b138-11ea-8659-901b0ef719ab)	Nessus	FreeBSD Local Security Checks	2020/6/22	2020/8/28	medium
137837	ISC BIND 9.11.x < 9.11.20 / 9.11.14-S1 < 9.11.19-S9 / 9.14.x < 9.14.13 / 9.16.x < 9.16.4 DoS	Nessus	DNS	2020/6/26	2020/8/28	medium
139047	Photon OS 1.0: Bindutils PHSA-2020-1.0-0309	Nessus	PhotonOS Local Security Checks	2020/7/29	2020/7/29	medium
147084	EulerOS Virtualization for ARM 64 3.0.6.0 : bind (EulerOS-SA-2021-1532)	Nessus	Huawei Local Security Checks	2021/3/4	2021/3/8	medium
148611	EulerOS Virtualization 2.9.1 : bind (EulerOS-SA-2021-1725)	Nessus	Huawei Local Security Checks	2021/4/15	2024/1/4	high

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