Important: Red Hat OpenStack Platform 16.2 (etcd) security update

Topic

An update for etcd is now available for Red Hat OpenStack Platform 16.2
(Train).

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

A highly-available key value store for shared configuration

Security Fix(es):

• Information discosure via debug function (CVE-2021-28235)
• html/template: improper handling of JavaScript whitespace

(CVE-2023-24540)

• golang.org/x/net/http2: avoid quadratic complexity in HPACK decoding

(CVE-2022-41723)

• crypto/tls: large handshake records may cause panics (CVE-2022-41724)
• net/http mime/multipart: denial of service from excessive resource

consumption (CVE-2022-41725)

• net/http net/textproto: denial of service from excessive memory

allocation (CVE-2023-24534)

• net/http net/textproto mime/multipart: denial of service from excessive

resource consumption (CVE-2023-24536)

• go/parser: Infinite loop in parsing (CVE-2023-24537)
• html/template: backticks not treated as string delimiters

(CVE-2023-24538)

• html/template: improper sanitization of CSS values (CVE-2023-24539)
• html/template: improper handling of empty HTML attributes

(CVE-2023-29400)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page 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 OpenStack for IBM Power 16.2 ppc64le
• Red Hat OpenStack 16.2 x86_64

Fixes

• BZ - 2178358 - CVE-2022-41723 net/http, golang.org/x/net/http2: avoid quadratic complexity in HPACK decoding
• BZ - 2178488 - CVE-2022-41725 golang: net/http, mime/multipart: denial of service from excessive resource consumption
• BZ - 2178492 - CVE-2022-41724 golang: crypto/tls: large handshake records may cause panics
• BZ - 2184441 - CVE-2021-28235 etcd: Information discosure via debug function
• BZ - 2184481 - CVE-2023-24538 golang: html/template: backticks not treated as string delimiters
• BZ - 2184482 - CVE-2023-24536 golang: net/http, net/textproto, mime/multipart: denial of service from excessive resource consumption
• BZ - 2184483 - CVE-2023-24534 golang: net/http, net/textproto: denial of service from excessive memory allocation
• BZ - 2184484 - CVE-2023-24537 golang: go/parser: Infinite loop in parsing
• BZ - 2196026 - CVE-2023-24539 golang: html/template: improper sanitization of CSS values
• BZ - 2196027 - CVE-2023-24540 golang: html/template: improper handling of JavaScript whitespace
• BZ - 2196029 - CVE-2023-29400 golang: html/template: improper handling of empty HTML attributes

CVEs

• CVE-2021-28235
• CVE-2022-41723
• CVE-2022-41724
• CVE-2022-41725
• CVE-2023-24534
• CVE-2023-24536
• CVE-2023-24537
• CVE-2023-24538
• CVE-2023-24539
• CVE-2023-24540
• CVE-2023-29400

References

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