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Red Hat Enterprise Linux 7: RHSA-2017:1095-01 Critical BIND DoS Flaws

red hat
Calendar Grey April 19, 2017
Scroller Redhat
Essential vulnerability patch for CentOS addresses potential denial of service issues. Keep informed regarding crucial updates.
An update for bind is now available for Red Hat Enterprise Linux 7

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the update, the BIND daemon (named) will be restarted automatically.

Summary

The Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols. BIND includes a DNS server (named); a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating correctly.
Security Fix(es):
* A denial of service flaw was found in the way BIND handled a query response containing CNAME or DNAME resource records in an unusual order. A remote attacker could use this flaw to make named exit unexpectedly with an assertion failure via a specially crafted DNS response. (CVE-2017-3137)
* A denial of service flaw was found in the way BIND handled query requests when using DNS64 with "break-dnssec yes" option. A remote attacker could use this flaw to make named exit unexpectedly with an assertion failure via a specially crafted DNS request. (CVE-2017-3136)
Red Hat would like to thank ISC for reporting these issues. Upstream acknowledges Oleg Gorokhov (Yandex) as the original reporter of CVE-2017-3136.

Topics%20covered

Topics Covered

security advisory update Red Hat Enterprise Linux critical severity mitigation BIND DoS flaw

References

https://access.redhat.com/security/cve/CVE-2017-3136 https://access.redhat.com/security/cve/CVE-2017-3137 https://access.redhat.com/security/updates/classification#important https://kb.isc.org/docs/aa-01465 https://kb.isc.org/docs/aa-01466

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: bind-9.9.4-38.el7_3.3.src.rpm
noarch: bind-license-9.9.4-38.el7_3.3.noarch.rpm
x86_64: bind-debuginfo-9.9.4-38.el7_3.3.i686.rpm bind-debuginfo-9.9.4-38.el7_3.3.x86_64.rpm bind-libs-9.9.4-38.el7_3.3.i686.rpm bind-libs-9.9.4-38.el7_3.3.x86_64.rpm bind-libs-lite-9.9.4-38.el7_3.3.i686.rpm bind-libs-lite-9.9.4-38.el7_3.3.x86_64.rpm bind-utils-9.9.4-38.el7_3.3.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: bind-9.9.4-38.el7_3.3.x86_64.rpm bind-chroot-9.9.4-38.el7_3.3.x86_64.rpm bind-debuginfo-9.9.4-38.el7_3.3.i686.rpm bind-debuginfo-9.9.4-38.el7_3.3.x86_64.rpm bind-devel-9.9.4-38.el7_3.3.i686.rpm bind-devel-9.9.4-38.el7_3.3.x86_64.rpm bind-lite-devel-9.9.4-38.el7_3.3.i686.rpm bind-lite-devel-9.9.4-38.el7_3.3.x86_64.rpm bind-pkcs11-9.9.4-38.el7_3.3.x86_64.rpm bind-pkcs11-devel-9.9.4-38.el7_3.3.i686.rpm bind-pkcs11-devel-9.9.4-38.el7_3.3.x86_64.rpm bind-pkcs11-libs-9.9.4-38.el7_3.3.i686.rpm bind-pkcs11-libs-9.9.4-38.el7_3.3.x86_64.rpm bind-pkcs11-utils-9.9.4-38.el7_3.3.x86_64.rpm bind-sdb-9.9.4-38.el7_3.3.x86_64.rpm bind-sdb-chroot-9.9.4-38.el7_3.3.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: bind-9.9.4-38.el7_3.3.src.rpm
noarch: bind-license-9.9.4-38.el7_3.3.noarch.rpm
x86_64:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:1095-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1095
Issue date: 2017-04-19

Topic

An update for bind is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory update Red Hat Enterprise Linux critical severity mitigation BIND DoS flaw

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - aarch64, noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1441125 - CVE-2017-3136 bind: Incorrect error handling causes assertion failure when using DNS64 with "break-dnssec yes;"

1441133 - CVE-2017-3137 bind: Processing a response containing CNAME or DNAME with unusual order can crash resolver

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