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Red Hat Product Errata RHSA-2023:6021 - Security Advisory
Issued: 2023-10-23 Updated: 2023-10-23


RHSA-2023:6021 - SECURITY ADVISORY

 * Overview
 * Updated Packages


SYNOPSIS

Important: varnish:6 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 the varnish:6 module 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 Red Hat Enterprise Linux 8.4 Update
Services for SAP Solutions.


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

Varnish Cache is a high-performance HTTP accelerator. It stores web pages in
memory so web servers don't have to create the same web page over and over
again, giving the website a significant speed up.


Security Fix(es):


 * HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack
   (Rapid Reset Attack) (CVE-2023-44487)

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 Server - AUS 8.4 x86_64
 * Red Hat Enterprise Linux Server - TUS 8.4 x86_64
 * Red Hat Enterprise Linux Server for Power LE - Update Services for SAP
   Solutions 8.4 ppc64le
 * Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.4
   x86_64


FIXES

 * BZ - 2242803 - CVE-2023-44487 HTTP/2: Multiple HTTP/2 enabled web servers are
   vulnerable to a DDoS attack (Rapid Reset Attack)


CVES

 * CVE-2023-44487


REFERENCES

 * https://access.redhat.com/security/updates/classification/#important
 * https://access.redhat.com/security/vulnerabilities/RHSB-2023-003

Note: More recent versions of these packages may be available. Click a package
name for more details.


RED HAT ENTERPRISE LINUX SERVER - AUS 8.4

SRPM varnish-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.src.rpm SHA-256:
6156da87e3c39ba5eccf833d0ca048ed1b3009b703a2fb9f71f8a64304fda956
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.src.rpm SHA-256:
889bc138f71b63f3f536a703c2b543decd43c6ddd7badfc788060f09621048bb x86_64
varnish-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.x86_64.rpm SHA-256:
b11b24805afb2eaefe8e35698e75a926487f8cf68a6f8c573fe92f6585707b92
varnish-devel-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.x86_64.rpm SHA-256:
de75679908a0626a8dc21f428dda21b499392082ff92194c5f4659ff83923e21
varnish-docs-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.x86_64.rpm SHA-256:
f52a773aca01dcba3ccacaf0938800edbdca503acf6c8cc3a9ae35bdc987ddfe
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm SHA-256:
920ed07b7c2c15cf5d3e381e340fc2cd5e0021fe4766833033877a9f68f35ab0
varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm
SHA-256: 90ca3131462169fc8032b17f247172f9884af877acc046b1378a10bc9aad20cc
varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm
SHA-256: 24e2c0f35c0d4f3cee3ebf383f6679c0cf441bc68e131c4450d856c87b4b8913


RED HAT ENTERPRISE LINUX SERVER - TUS 8.4

SRPM varnish-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.src.rpm SHA-256:
6156da87e3c39ba5eccf833d0ca048ed1b3009b703a2fb9f71f8a64304fda956
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.src.rpm SHA-256:
889bc138f71b63f3f536a703c2b543decd43c6ddd7badfc788060f09621048bb x86_64
varnish-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.x86_64.rpm SHA-256:
b11b24805afb2eaefe8e35698e75a926487f8cf68a6f8c573fe92f6585707b92
varnish-devel-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.x86_64.rpm SHA-256:
de75679908a0626a8dc21f428dda21b499392082ff92194c5f4659ff83923e21
varnish-docs-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.x86_64.rpm SHA-256:
f52a773aca01dcba3ccacaf0938800edbdca503acf6c8cc3a9ae35bdc987ddfe
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm SHA-256:
920ed07b7c2c15cf5d3e381e340fc2cd5e0021fe4766833033877a9f68f35ab0
varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm
SHA-256: 90ca3131462169fc8032b17f247172f9884af877acc046b1378a10bc9aad20cc
varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm
SHA-256: 24e2c0f35c0d4f3cee3ebf383f6679c0cf441bc68e131c4450d856c87b4b8913


RED HAT ENTERPRISE LINUX SERVER FOR POWER LE - UPDATE SERVICES FOR SAP SOLUTIONS
8.4

SRPM varnish-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.src.rpm SHA-256:
6156da87e3c39ba5eccf833d0ca048ed1b3009b703a2fb9f71f8a64304fda956
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.src.rpm SHA-256:
889bc138f71b63f3f536a703c2b543decd43c6ddd7badfc788060f09621048bb ppc64le
varnish-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.ppc64le.rpm SHA-256:
89c1a737cd40e099ea4b9542a255140828f33f011e29ee3b0d28af3c15400822
varnish-devel-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.ppc64le.rpm SHA-256:
7001bc3634e38cba4651175da73c0a5c9799a316deda37a361c26598f7c14741
varnish-docs-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.ppc64le.rpm SHA-256:
e1971e14e5d3d88889c12d3ee01cf78ff137850e41754345716477424bbbe06c
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm SHA-256:
4dc937261656c078b6e2d48e7832cbdbcc99f0a81a88ef1f40ed31262e913f81
varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm
SHA-256: 261977ebd56c3a590669ab62136a0e3c63db106a9593d6c9c8cbcb4c86f20958
varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le.rpm
SHA-256: cc85d7217f2ab315596aa177d4dbbdf7ae287710325bfbf3468a2e5625dead49


RED HAT ENTERPRISE LINUX FOR X86_64 - UPDATE SERVICES FOR SAP SOLUTIONS 8.4

SRPM varnish-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.src.rpm SHA-256:
6156da87e3c39ba5eccf833d0ca048ed1b3009b703a2fb9f71f8a64304fda956
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.src.rpm SHA-256:
889bc138f71b63f3f536a703c2b543decd43c6ddd7badfc788060f09621048bb x86_64
varnish-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.x86_64.rpm SHA-256:
b11b24805afb2eaefe8e35698e75a926487f8cf68a6f8c573fe92f6585707b92
varnish-devel-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.x86_64.rpm SHA-256:
de75679908a0626a8dc21f428dda21b499392082ff92194c5f4659ff83923e21
varnish-docs-6.0.6-2.module+el8.4.0+20467+7fe641ed.4.x86_64.rpm SHA-256:
f52a773aca01dcba3ccacaf0938800edbdca503acf6c8cc3a9ae35bdc987ddfe
varnish-modules-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm SHA-256:
920ed07b7c2c15cf5d3e381e340fc2cd5e0021fe4766833033877a9f68f35ab0
varnish-modules-debuginfo-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm
SHA-256: 90ca3131462169fc8032b17f247172f9884af877acc046b1378a10bc9aad20cc
varnish-modules-debugsource-0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64.rpm
SHA-256: 24e2c0f35c0d4f3cee3ebf383f6679c0cf441bc68e131c4450d856c87b4b8913

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


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