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Red Hat Product Errata RHSA-2021:0151 - Security Advisory
Issued:
2021-01-19
Updated:
2021-01-19

RHSA-2021:0151 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Important: dnsmasq security update

Type/Severity

Security Advisory: Important

Red Hat Insights patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

An update for dnsmasq is now available for Red Hat Enterprise Linux 8.2 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server.

Security Fix(es):

  • dnsmasq: heap-based buffer overflow in sort_rrset() when DNSSEC is enabled (CVE-2020-25681)
  • dnsmasq: buffer overflow in extract_name() due to missing length check when DNSSEC is enabled (CVE-2020-25682)
  • dnsmasq: heap-based buffer overflow with large memcpy in get_rdata() when DNSSEC is enabled (CVE-2020-25683)
  • dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker (CVE-2020-25684)
  • dnsmasq: loose query name check in reply_query() makes forging replies easier for an off-path attacker (CVE-2020-25685)
  • dnsmasq: multiple queries forwarded for the same name makes forging replies easier for an off-path attacker (CVE-2020-25686)
  • dnsmasq: heap-based buffer overflow with large memcpy in sort_rrset() when DNSSEC is enabled (CVE-2020-25687)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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

Affected Products

  • Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.2 x86_64
  • Red Hat Enterprise Linux Server - AUS 8.2 x86_64
  • Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.2 s390x
  • Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.2 ppc64le
  • Red Hat Enterprise Linux Server - TUS 8.2 x86_64
  • Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.2 aarch64
  • Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.2 ppc64le
  • Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.2 x86_64

Fixes

  • BZ - 1881875 - CVE-2020-25681 dnsmasq: heap-based buffer overflow in sort_rrset() when DNSSEC is enabled
  • BZ - 1882014 - CVE-2020-25682 dnsmasq: buffer overflow in extract_name() due to missing length check when DNSSEC is enabled
  • BZ - 1882018 - CVE-2020-25683 dnsmasq: heap-based buffer overflow with large memcpy in get_rdata() when DNSSEC is enabled
  • BZ - 1889686 - CVE-2020-25684 dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker
  • BZ - 1889688 - CVE-2020-25685 dnsmasq: loose query name check in reply_query() makes forging replies easier for an off-path attacker
  • BZ - 1890125 - CVE-2020-25686 dnsmasq: multiple queries forwarded for the same name makes forging replies easier for an off-path attacker
  • BZ - 1891568 - CVE-2020-25687 dnsmasq: heap-based buffer overflow with large memcpy in sort_rrset() when DNSSEC is enabled

CVEs

  • CVE-2020-25681
  • CVE-2020-25682
  • CVE-2020-25683
  • CVE-2020-25684
  • CVE-2020-25685
  • CVE-2020-25686
  • CVE-2020-25687

References

  • https://access.redhat.com/security/updates/classification/#important
  • https://access.redhat.com/security/vulnerabilities/RHSB-2021-001
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.2

SRPM
dnsmasq-2.79-11.el8_2.2.src.rpm SHA-256: 62e3da6c010c20c8df38576b4395b6960ad329d4efc9368466880d7e5c91e452
x86_64
dnsmasq-2.79-11.el8_2.2.x86_64.rpm SHA-256: b9946baec135bb2ba9f9b3034cf334be7a830d9b6572f4f39cbe0bdcea96a6d0
dnsmasq-debuginfo-2.79-11.el8_2.2.x86_64.rpm SHA-256: 06977ec9e61b6984d16102476f90e2205fb05b531b274a4cedd80cae85eb639a
dnsmasq-debugsource-2.79-11.el8_2.2.x86_64.rpm SHA-256: 2a7ed157a6859340c64c131396d1f9b62e83e4acfb7186df56377edf3b581038
dnsmasq-utils-2.79-11.el8_2.2.x86_64.rpm SHA-256: 4035d33d037ede09304dab751b91eb6ae3438deeafe29bbe035fce663f9b14d1
dnsmasq-utils-debuginfo-2.79-11.el8_2.2.x86_64.rpm SHA-256: cccb2219755f3a606e7d0041bf7a5e98d1c99242eac7b2e0240c1b9544eac42c

Red Hat Enterprise Linux Server - AUS 8.2

SRPM
dnsmasq-2.79-11.el8_2.2.src.rpm SHA-256: 62e3da6c010c20c8df38576b4395b6960ad329d4efc9368466880d7e5c91e452
x86_64
dnsmasq-2.79-11.el8_2.2.x86_64.rpm SHA-256: b9946baec135bb2ba9f9b3034cf334be7a830d9b6572f4f39cbe0bdcea96a6d0
dnsmasq-debuginfo-2.79-11.el8_2.2.x86_64.rpm SHA-256: 06977ec9e61b6984d16102476f90e2205fb05b531b274a4cedd80cae85eb639a
dnsmasq-debugsource-2.79-11.el8_2.2.x86_64.rpm SHA-256: 2a7ed157a6859340c64c131396d1f9b62e83e4acfb7186df56377edf3b581038
dnsmasq-utils-2.79-11.el8_2.2.x86_64.rpm SHA-256: 4035d33d037ede09304dab751b91eb6ae3438deeafe29bbe035fce663f9b14d1
dnsmasq-utils-debuginfo-2.79-11.el8_2.2.x86_64.rpm SHA-256: cccb2219755f3a606e7d0041bf7a5e98d1c99242eac7b2e0240c1b9544eac42c

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.2

SRPM
dnsmasq-2.79-11.el8_2.2.src.rpm SHA-256: 62e3da6c010c20c8df38576b4395b6960ad329d4efc9368466880d7e5c91e452
s390x
dnsmasq-2.79-11.el8_2.2.s390x.rpm SHA-256: 00837ee92eb34856b3468a90c4f970c16cdeb7a5cebf8422529477b605f3bab4
dnsmasq-debuginfo-2.79-11.el8_2.2.s390x.rpm SHA-256: 4748005b21db6c14976ff03d7b9a98e4a2a4f6c5d497336adaa958cd73c4d96f
dnsmasq-debugsource-2.79-11.el8_2.2.s390x.rpm SHA-256: 1096257d41508b5035c79b5e042c8ba194cd3db511d715ee32367ac5d1f19b45
dnsmasq-utils-2.79-11.el8_2.2.s390x.rpm SHA-256: efddbd7ee8fb61e693299e7623d6da112bf2cc113a18a6c45b009c4f94f9f0e0
dnsmasq-utils-debuginfo-2.79-11.el8_2.2.s390x.rpm SHA-256: de58003745ebb17224693d23ef880d8f620de38451826fe8852f6b541c2d2297

Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.2

SRPM
dnsmasq-2.79-11.el8_2.2.src.rpm SHA-256: 62e3da6c010c20c8df38576b4395b6960ad329d4efc9368466880d7e5c91e452
ppc64le
dnsmasq-2.79-11.el8_2.2.ppc64le.rpm SHA-256: bfce5a2b178cd7244ad7c3497676c4bcdb7e8c54cc7cb67c242fb34e5c619bd6
dnsmasq-debuginfo-2.79-11.el8_2.2.ppc64le.rpm SHA-256: 3377129725382f57260f83fd294e0bb6e3a823c2cb467be3cc0d287aa7383f72
dnsmasq-debugsource-2.79-11.el8_2.2.ppc64le.rpm SHA-256: 2f6a0821b08f2b8db6ba4fd5c93bc30939c1137a016d1a4adc884cb3b2c13ba5
dnsmasq-utils-2.79-11.el8_2.2.ppc64le.rpm SHA-256: 4ac68d15311f4d9a381f7937b13738f7718ec10cb786e6c0b121ae829b58efe0
dnsmasq-utils-debuginfo-2.79-11.el8_2.2.ppc64le.rpm SHA-256: 959af231a9abe6848f235870dafb1aef84eb63e2a2afdd591e697aadf6c1aad5

Red Hat Enterprise Linux Server - TUS 8.2

SRPM
dnsmasq-2.79-11.el8_2.2.src.rpm SHA-256: 62e3da6c010c20c8df38576b4395b6960ad329d4efc9368466880d7e5c91e452
x86_64
dnsmasq-2.79-11.el8_2.2.x86_64.rpm SHA-256: b9946baec135bb2ba9f9b3034cf334be7a830d9b6572f4f39cbe0bdcea96a6d0
dnsmasq-debuginfo-2.79-11.el8_2.2.x86_64.rpm SHA-256: 06977ec9e61b6984d16102476f90e2205fb05b531b274a4cedd80cae85eb639a
dnsmasq-debugsource-2.79-11.el8_2.2.x86_64.rpm SHA-256: 2a7ed157a6859340c64c131396d1f9b62e83e4acfb7186df56377edf3b581038
dnsmasq-utils-2.79-11.el8_2.2.x86_64.rpm SHA-256: 4035d33d037ede09304dab751b91eb6ae3438deeafe29bbe035fce663f9b14d1
dnsmasq-utils-debuginfo-2.79-11.el8_2.2.x86_64.rpm SHA-256: cccb2219755f3a606e7d0041bf7a5e98d1c99242eac7b2e0240c1b9544eac42c

Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.2

SRPM
dnsmasq-2.79-11.el8_2.2.src.rpm SHA-256: 62e3da6c010c20c8df38576b4395b6960ad329d4efc9368466880d7e5c91e452
aarch64
dnsmasq-2.79-11.el8_2.2.aarch64.rpm SHA-256: af9cd6470ba5a81e0f41dc3197b9b548317483bf4f6f6052300f3f1829092701
dnsmasq-debuginfo-2.79-11.el8_2.2.aarch64.rpm SHA-256: 9a5ea7d12a615ff1a4bd7614379dc8632793bfacc710ae0b3154f9710d0ae7b9
dnsmasq-debugsource-2.79-11.el8_2.2.aarch64.rpm SHA-256: cd75bb6cb53a2162c885c735bca1e8f9d4e262fc1fa559291c04b3769c88e11f
dnsmasq-utils-2.79-11.el8_2.2.aarch64.rpm SHA-256: 677c0b6a4e3678e1db92efe6a3cbcce6557dacec1b1c34ba40f486da3de24a00
dnsmasq-utils-debuginfo-2.79-11.el8_2.2.aarch64.rpm SHA-256: e86ce5acbea9f2698bff728d79c29d9b545848da9c7d9da8d365d516db180729

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.2

SRPM
dnsmasq-2.79-11.el8_2.2.src.rpm SHA-256: 62e3da6c010c20c8df38576b4395b6960ad329d4efc9368466880d7e5c91e452
ppc64le
dnsmasq-2.79-11.el8_2.2.ppc64le.rpm SHA-256: bfce5a2b178cd7244ad7c3497676c4bcdb7e8c54cc7cb67c242fb34e5c619bd6
dnsmasq-debuginfo-2.79-11.el8_2.2.ppc64le.rpm SHA-256: 3377129725382f57260f83fd294e0bb6e3a823c2cb467be3cc0d287aa7383f72
dnsmasq-debugsource-2.79-11.el8_2.2.ppc64le.rpm SHA-256: 2f6a0821b08f2b8db6ba4fd5c93bc30939c1137a016d1a4adc884cb3b2c13ba5
dnsmasq-utils-2.79-11.el8_2.2.ppc64le.rpm SHA-256: 4ac68d15311f4d9a381f7937b13738f7718ec10cb786e6c0b121ae829b58efe0
dnsmasq-utils-debuginfo-2.79-11.el8_2.2.ppc64le.rpm SHA-256: 959af231a9abe6848f235870dafb1aef84eb63e2a2afdd591e697aadf6c1aad5

Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.2

SRPM
dnsmasq-2.79-11.el8_2.2.src.rpm SHA-256: 62e3da6c010c20c8df38576b4395b6960ad329d4efc9368466880d7e5c91e452
x86_64
dnsmasq-2.79-11.el8_2.2.x86_64.rpm SHA-256: b9946baec135bb2ba9f9b3034cf334be7a830d9b6572f4f39cbe0bdcea96a6d0
dnsmasq-debuginfo-2.79-11.el8_2.2.x86_64.rpm SHA-256: 06977ec9e61b6984d16102476f90e2205fb05b531b274a4cedd80cae85eb639a
dnsmasq-debugsource-2.79-11.el8_2.2.x86_64.rpm SHA-256: 2a7ed157a6859340c64c131396d1f9b62e83e4acfb7186df56377edf3b581038
dnsmasq-utils-2.79-11.el8_2.2.x86_64.rpm SHA-256: 4035d33d037ede09304dab751b91eb6ae3438deeafe29bbe035fce663f9b14d1
dnsmasq-utils-debuginfo-2.79-11.el8_2.2.x86_64.rpm SHA-256: cccb2219755f3a606e7d0041bf7a5e98d1c99242eac7b2e0240c1b9544eac42c

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.

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