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Red Hat Product Errata RHSA-2021:0154 - Security Advisory
Issued:
2021-01-19
Updated:
2021-01-19

RHSA-2021:0154 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Moderate: dnsmasq security update

Type/Severity

Security Advisory: Moderate

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 7.7 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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: 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)

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 7.7 x86_64
  • Red Hat Enterprise Linux Server - AUS 7.7 x86_64
  • Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.7 s390x
  • Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.7 ppc64
  • Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.7 ppc64le
  • Red Hat Enterprise Linux Server - TUS 7.7 x86_64
  • Red Hat Enterprise Linux EUS Compute Node 7.7 x86_64
  • Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.7 ppc64le
  • Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.7 x86_64

Fixes

  • 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

CVEs

  • CVE-2020-25684
  • CVE-2020-25685
  • CVE-2020-25686

References

  • https://access.redhat.com/security/updates/classification/#moderate
  • 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 7.7

SRPM
dnsmasq-2.76-10.el7_7.2.src.rpm SHA-256: 3b855c28529b8293e08b59337b98a6e3f2fc0540914eedcf59de8f5bd2e7dd46
x86_64
dnsmasq-2.76-10.el7_7.2.x86_64.rpm SHA-256: 453b035e3e6ed488440a3a21b5c34a772c1f358cef63ebceee141d0e95084e17
dnsmasq-debuginfo-2.76-10.el7_7.2.x86_64.rpm SHA-256: 2e4f913a7ca535baff8dd4e30cadd2bd3c573d9d0cf0392d288c45c50b45ed5d
dnsmasq-debuginfo-2.76-10.el7_7.2.x86_64.rpm SHA-256: 2e4f913a7ca535baff8dd4e30cadd2bd3c573d9d0cf0392d288c45c50b45ed5d
dnsmasq-utils-2.76-10.el7_7.2.x86_64.rpm SHA-256: 5e4968886248e514eb17d9e5a79bd3111b13ff2e50a9383807cc728d683fa872

Red Hat Enterprise Linux Server - AUS 7.7

SRPM
dnsmasq-2.76-10.el7_7.2.src.rpm SHA-256: 3b855c28529b8293e08b59337b98a6e3f2fc0540914eedcf59de8f5bd2e7dd46
x86_64
dnsmasq-2.76-10.el7_7.2.x86_64.rpm SHA-256: 453b035e3e6ed488440a3a21b5c34a772c1f358cef63ebceee141d0e95084e17
dnsmasq-debuginfo-2.76-10.el7_7.2.x86_64.rpm SHA-256: 2e4f913a7ca535baff8dd4e30cadd2bd3c573d9d0cf0392d288c45c50b45ed5d
dnsmasq-debuginfo-2.76-10.el7_7.2.x86_64.rpm SHA-256: 2e4f913a7ca535baff8dd4e30cadd2bd3c573d9d0cf0392d288c45c50b45ed5d
dnsmasq-utils-2.76-10.el7_7.2.x86_64.rpm SHA-256: 5e4968886248e514eb17d9e5a79bd3111b13ff2e50a9383807cc728d683fa872

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.7

SRPM
dnsmasq-2.76-10.el7_7.2.src.rpm SHA-256: 3b855c28529b8293e08b59337b98a6e3f2fc0540914eedcf59de8f5bd2e7dd46
s390x
dnsmasq-2.76-10.el7_7.2.s390x.rpm SHA-256: 14679d6441c7e45ab9e4c4f67b971e94f494cbdc9777edefb30d47bc1d6c66b5
dnsmasq-debuginfo-2.76-10.el7_7.2.s390x.rpm SHA-256: e4f514ee428973bb1ca965943a719a74000f8269a243ed3cd312aac16ddd7794
dnsmasq-debuginfo-2.76-10.el7_7.2.s390x.rpm SHA-256: e4f514ee428973bb1ca965943a719a74000f8269a243ed3cd312aac16ddd7794
dnsmasq-utils-2.76-10.el7_7.2.s390x.rpm SHA-256: f9cdb7c7b36f14c76a8be8bd820fdb661bae3c6a67bf36fabfcb10bfbd1f11c0

Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.7

SRPM
dnsmasq-2.76-10.el7_7.2.src.rpm SHA-256: 3b855c28529b8293e08b59337b98a6e3f2fc0540914eedcf59de8f5bd2e7dd46
ppc64
dnsmasq-2.76-10.el7_7.2.ppc64.rpm SHA-256: 03f70c4f211b77c0760280fa5964c4022cc17f2b6aa11179346ade19ebfeff51
dnsmasq-debuginfo-2.76-10.el7_7.2.ppc64.rpm SHA-256: 0a2d1821da87213f0b3533a9be1c4c977ea71770b7980db57497ac63d7a6064d
dnsmasq-debuginfo-2.76-10.el7_7.2.ppc64.rpm SHA-256: 0a2d1821da87213f0b3533a9be1c4c977ea71770b7980db57497ac63d7a6064d
dnsmasq-utils-2.76-10.el7_7.2.ppc64.rpm SHA-256: c6472b6055bd6bffa0f19852c49e671c148069d2453e945f7e630e495a7b861e

Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.7

SRPM
dnsmasq-2.76-10.el7_7.2.src.rpm SHA-256: 3b855c28529b8293e08b59337b98a6e3f2fc0540914eedcf59de8f5bd2e7dd46
ppc64le
dnsmasq-2.76-10.el7_7.2.ppc64le.rpm SHA-256: 45fde3ddae45b716cd1f8dab95c231df87006534e5664f905b0f2f03fde8bfd8
dnsmasq-debuginfo-2.76-10.el7_7.2.ppc64le.rpm SHA-256: e7a2fc7a3f2f984e0e557d65e9c7fe318d47958560b6f743536ae4b5c268887d
dnsmasq-debuginfo-2.76-10.el7_7.2.ppc64le.rpm SHA-256: e7a2fc7a3f2f984e0e557d65e9c7fe318d47958560b6f743536ae4b5c268887d
dnsmasq-utils-2.76-10.el7_7.2.ppc64le.rpm SHA-256: 1fb601090184c482f97000a8fbc42882052aacf2f12d51f2b43ab5e4de8a90c2

Red Hat Enterprise Linux Server - TUS 7.7

SRPM
dnsmasq-2.76-10.el7_7.2.src.rpm SHA-256: 3b855c28529b8293e08b59337b98a6e3f2fc0540914eedcf59de8f5bd2e7dd46
x86_64
dnsmasq-2.76-10.el7_7.2.x86_64.rpm SHA-256: 453b035e3e6ed488440a3a21b5c34a772c1f358cef63ebceee141d0e95084e17
dnsmasq-debuginfo-2.76-10.el7_7.2.x86_64.rpm SHA-256: 2e4f913a7ca535baff8dd4e30cadd2bd3c573d9d0cf0392d288c45c50b45ed5d
dnsmasq-debuginfo-2.76-10.el7_7.2.x86_64.rpm SHA-256: 2e4f913a7ca535baff8dd4e30cadd2bd3c573d9d0cf0392d288c45c50b45ed5d
dnsmasq-utils-2.76-10.el7_7.2.x86_64.rpm SHA-256: 5e4968886248e514eb17d9e5a79bd3111b13ff2e50a9383807cc728d683fa872

Red Hat Enterprise Linux EUS Compute Node 7.7

SRPM
dnsmasq-2.76-10.el7_7.2.src.rpm SHA-256: 3b855c28529b8293e08b59337b98a6e3f2fc0540914eedcf59de8f5bd2e7dd46
x86_64
dnsmasq-2.76-10.el7_7.2.x86_64.rpm SHA-256: 453b035e3e6ed488440a3a21b5c34a772c1f358cef63ebceee141d0e95084e17
dnsmasq-debuginfo-2.76-10.el7_7.2.x86_64.rpm SHA-256: 2e4f913a7ca535baff8dd4e30cadd2bd3c573d9d0cf0392d288c45c50b45ed5d
dnsmasq-debuginfo-2.76-10.el7_7.2.x86_64.rpm SHA-256: 2e4f913a7ca535baff8dd4e30cadd2bd3c573d9d0cf0392d288c45c50b45ed5d
dnsmasq-utils-2.76-10.el7_7.2.x86_64.rpm SHA-256: 5e4968886248e514eb17d9e5a79bd3111b13ff2e50a9383807cc728d683fa872

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.7

SRPM
dnsmasq-2.76-10.el7_7.2.src.rpm SHA-256: 3b855c28529b8293e08b59337b98a6e3f2fc0540914eedcf59de8f5bd2e7dd46
ppc64le
dnsmasq-2.76-10.el7_7.2.ppc64le.rpm SHA-256: 45fde3ddae45b716cd1f8dab95c231df87006534e5664f905b0f2f03fde8bfd8
dnsmasq-debuginfo-2.76-10.el7_7.2.ppc64le.rpm SHA-256: e7a2fc7a3f2f984e0e557d65e9c7fe318d47958560b6f743536ae4b5c268887d
dnsmasq-debuginfo-2.76-10.el7_7.2.ppc64le.rpm SHA-256: e7a2fc7a3f2f984e0e557d65e9c7fe318d47958560b6f743536ae4b5c268887d
dnsmasq-utils-2.76-10.el7_7.2.ppc64le.rpm SHA-256: 1fb601090184c482f97000a8fbc42882052aacf2f12d51f2b43ab5e4de8a90c2

Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.7

SRPM
dnsmasq-2.76-10.el7_7.2.src.rpm SHA-256: 3b855c28529b8293e08b59337b98a6e3f2fc0540914eedcf59de8f5bd2e7dd46
x86_64
dnsmasq-2.76-10.el7_7.2.x86_64.rpm SHA-256: 453b035e3e6ed488440a3a21b5c34a772c1f358cef63ebceee141d0e95084e17
dnsmasq-debuginfo-2.76-10.el7_7.2.x86_64.rpm SHA-256: 2e4f913a7ca535baff8dd4e30cadd2bd3c573d9d0cf0392d288c45c50b45ed5d
dnsmasq-debuginfo-2.76-10.el7_7.2.x86_64.rpm SHA-256: 2e4f913a7ca535baff8dd4e30cadd2bd3c573d9d0cf0392d288c45c50b45ed5d
dnsmasq-utils-2.76-10.el7_7.2.x86_64.rpm SHA-256: 5e4968886248e514eb17d9e5a79bd3111b13ff2e50a9383807cc728d683fa872

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

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