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Red Hat Enterprise Linux 8.4 RHSA-2023-3677-01 Critical: c-ares DoS

red hat
Calendar Grey June 20, 2023
Dist Redhat Esm H88
Important c-ares enhancement for Red Hat Enterprise Linux resolves denial of service flaw affecting DNS queries.
An update for c-ares is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, and...

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

Summary

The c-ares C library defines asynchronous DNS (Domain Name System) requests and provides name resolving API.
Security Fix(es):
* c-ares: 0-byte UDP payload Denial of Service (CVE-2023-32067)
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.

Topics%20covered

Topics Covered

security advisory Red Hat Denial of Service important update c-ares

References

https://access.redhat.com/security/cve/CVE-2023-32067 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux BaseOS AUS (v.8.4):
Source: c-ares-1.13.0-5.el8_4.2.src.rpm
x86_64: c-ares-1.13.0-5.el8_4.2.i686.rpm c-ares-1.13.0-5.el8_4.2.x86_64.rpm c-ares-debuginfo-1.13.0-5.el8_4.2.i686.rpm c-ares-debuginfo-1.13.0-5.el8_4.2.x86_64.rpm c-ares-debugsource-1.13.0-5.el8_4.2.i686.rpm c-ares-debugsource-1.13.0-5.el8_4.2.x86_64.rpm c-ares-devel-1.13.0-5.el8_4.2.i686.rpm c-ares-devel-1.13.0-5.el8_4.2.x86_64.rpm
Red Hat Enterprise Linux BaseOS E4S (v.8.4):
Source: c-ares-1.13.0-5.el8_4.2.src.rpm
aarch64: c-ares-1.13.0-5.el8_4.2.aarch64.rpm c-ares-debuginfo-1.13.0-5.el8_4.2.aarch64.rpm c-ares-debugsource-1.13.0-5.el8_4.2.aarch64.rpm c-ares-devel-1.13.0-5.el8_4.2.aarch64.rpm
ppc64le: c-ares-1.13.0-5.el8_4.2.ppc64le.rpm c-ares-debuginfo-1.13.0-5.el8_4.2.ppc64le.rpm c-ares-debugsource-1.13.0-5.el8_4.2.ppc64le.rpm c-ares-devel-1.13.0-5.el8_4.2.ppc64le.rpm
s390x: c-ares-1.13.0-5.el8_4.2.s390x.rpm c-ares-debuginfo-1.13.0-5.el8_4.2.s390x.rpm c-ares-debugsource-1.13.0-5.el8_4.2.s390x.rpm c-ares-devel-1.13.0-5.el8_4.2.s390x.rpm
x86_64: c-ares-1.13.0-5.el8_4.2.i686.rpm c-ares-1.13.0-5.el8_4.2.x86_64.rpm c-ares-debuginfo-1.13.0-5.el8_4.2.i686.rpm c-ares-debuginfo-1.13.0-5.el8_4.2.x86_64.rpm c-ares-debugsource-1.13.0-5.el8_4.2.i686.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:3677-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:3677
Issue date: 2023-06-20

Topic

An update for c-ares is now available for Red Hat Enterprise Linux 8.4Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4Telecommunications Update Service, and Red Hat Enterprise Linux 8.4 UpdateServices for SAP Solutions.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 Red Hat Denial of Service important update c-ares

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS AUS (v.8.4) - x86_64

Red Hat Enterprise Linux BaseOS E4S (v.8.4) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux BaseOS TUS (v.8.4) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

2209502 - CVE-2023-32067 c-ares: 0-byte UDP payload Denial of Service

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