Vulnerability-Lookup

RHSA-2023:3447

Vulnerability from csaf_redhat - Published: 2023-06-05 18:54 - Updated: 2026-11-06 03:36

Summary

Red Hat Security Advisory: Red Hat OpenStack Platform 16.1 (etcd) security update

Severity

Important

Notes

Topic: An update for etcd is now available for Red Hat OpenStack Platform 16.1 (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.

Details: A highly-available key value store for shared configuration Security Fix(es): * Information discosure via debug function (CVE-2021-28235) * golang.org/x/net/http2: avoid quadratic complexity in HPACK decoding (CVE-2022-41723) 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.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2021-28235

A flaw was found in etcd, where etc-io could allow a remote attacker to gain elevated privileges on the system caused by a vulnerability in the debug function. By sending a specially crafted request, an attacker can gain elevated privileges.

9.8 (Critical)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-287 - Improper Authentication

Affected products

Fixed 7 products

Product	Version	Remediation
Unresolved product id: 8Base-RHOS-16.1:etcd-0:3.3.23-14.el8ost.ppc64le	—	Vendor Fix fix
Unresolved product id: 8Base-RHOS-16.1:etcd-0:3.3.23-14.el8ost.src	—	Vendor Fix fix
Unresolved product id: 8Base-RHOS-16.1:etcd-0:3.3.23-14.el8ost.x86_64	—	Vendor Fix fix
Unresolved product id: 8Base-RHOS-16.1:etcd-debuginfo-0:3.3.23-14.el8ost.ppc64le	—	Vendor Fix fix
Unresolved product id: 8Base-RHOS-16.1:etcd-debuginfo-0:3.3.23-14.el8ost.x86_64	—	Vendor Fix fix
Unresolved product id: 8Base-RHOS-16.1:etcd-debugsource-0:3.3.23-14.el8ost.ppc64le	—	Vendor Fix fix
Unresolved product id: 8Base-RHOS-16.1:etcd-debugsource-0:3.3.23-14.el8ost.x86_64	—	Vendor Fix fix

Threats

Impact Important

CVE-2022-41723

A flaw was found in golang. A maliciously crafted HTTP/2 stream could cause excessive CPU consumption in the HPACK decoder, sufficient to cause a denial of service from a small number of requests.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-400 - Uncontrolled Resource Consumption

Affected products

Fixed 7 products, the same list as for CVE-2021-28235

Threats

Impact Moderate

References

20 references

URL	Category
https://access.redhat.com/errata/RHSA-2023:3447	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2178358	external
https://bugzilla.redhat.com/show_bug.cgi?id=2184441	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2021-28235	self
https://bugzilla.redhat.com/show_bug.cgi?id=2184441	external
https://www.cve.org/CVERecord?id=CVE-2021-28235	external
https://nvd.nist.gov/vuln/detail/CVE-2021-28235	external
https://access.redhat.com/security/cve/CVE-2022-41723	self
https://bugzilla.redhat.com/show_bug.cgi?id=2178358	external
https://www.cve.org/CVERecord?id=CVE-2022-41723	external
https://nvd.nist.gov/vuln/detail/CVE-2022-41723	external
https://github.com/advisories/GHSA-vvpx-j8f3-3w6h	external
https://go.dev/cl/468135	external
https://go.dev/cl/468295	external
https://go.dev/issue/57855	external
https://groups.google.com/g/golang-announce/c/V0a…	external
https://pkg.go.dev/vuln/GO-2023-1571	external
https://vuln.go.dev/ID/GO-2023-1571.json	external

Acknowledgments

Catena Cyber Philippe Antoine

JSON

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            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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        },
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          "text": "golang.org/x/net/http2: avoid quadratic complexity in HPACK decoding",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Within OpenShift Container Platform, the maximum impact of this vulnerability is a denial of service against an individual container so the impact could not cascade across the entire infrastructure, this vulnerability is rated Moderate impact.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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}

CVE-2021-28235 (GCVE-0-2021-28235)

Vulnerability from cvelistv5 – Published: 2023-04-04 00:00 – Updated: 2026-07-09 00:12

Summary

Authentication vulnerability found in Etcd-io v.3.4.10 allows remote attackers to escalate privileges via the debug function.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-14 17:24 UTC

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 29/100 over 2132 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/etcd-io/etcd
https://github.com/lucyxss/etcd-3.4.10-test/blob/…
https://github.com/lucyxss/etcd-3.4.10-test/blob/…
https://github.com/etcd-io/etcd/pull/15648

Show details on NVD website

JSON

To clipboard

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CVE-2022-41723 (GCVE-0-2022-41723)

Vulnerability from cvelistv5 – Published: 2023-02-28 17:19 – Updated: 2025-05-05 16:12

Title

Denial of service via crafted HTTP/2 stream in net/http and golang.org/x/net

Summary

A maliciously crafted HTTP/2 stream could cause excessive CPU consumption in the HPACK decoder, sufficient to cause a denial of service from a small number of small requests.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-23 13:26 UTC

CWE

CWE 400: Uncontrolled Resource Consumption
NVD-CWE-Other

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 76 records in the last 180 days details

References

15 references

URL	Tags
https://go.dev/issue/57855
https://go.dev/cl/468135
https://go.dev/cl/468295
https://groups.google.com/g/golang-announce/c/V0a…
https://pkg.go.dev/vuln/GO-2023-1571
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://www.couchbase.com/alerts/
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://security.gentoo.org/glsa/202311-09
https://security.netapp.com/advisory/ntap-2023033…

Impacted products

3 products

Vendor	Product	Version
Go standard library	net/http	Affected: 0 , < 1.19.6 (semver) Affected: 1.20.0-0 , < 1.20.1 (semver)
golang.org/x/net	golang.org/x/net/http2	Affected: 0 , < 0.7.0 (semver)
golang.org/x/net	golang.org/x/net/http2/hpack	Affected: 0 , < 0.7.0 (semver)

Credits

Philippe Antoine (Catena cyber)

Show details on NVD website

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To clipboard

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            {
              "name": "responseWriter.WriteString"
            },
            {
              "name": "serverConn.CloseConn"
            },
            {
              "name": "serverConn.Flush"
            },
            {
              "name": "stickyErrWriter.Write"
            },
            {
              "name": "transportResponseBody.Close"
            },
            {
              "name": "transportResponseBody.Read"
            },
            {
              "name": "writeData.String"
            }
          ],
          "vendor": "golang.org/x/net",
          "versions": [
            {
              "lessThan": "0.7.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/net/http2/hpack",
          "product": "golang.org/x/net/http2/hpack",
          "programRoutines": [
            {
              "name": "Decoder.parseFieldLiteral"
            },
            {
              "name": "Decoder.readString"
            },
            {
              "name": "Decoder.DecodeFull"
            },
            {
              "name": "Decoder.Write"
            }
          ],
          "vendor": "golang.org/x/net",
          "versions": [
            {
              "lessThan": "0.7.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Philippe Antoine (Catena cyber)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A maliciously crafted HTTP/2 stream could cause excessive CPU consumption in the HPACK decoder, sufficient to cause a denial of service from a small number of small requests."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE 400: Uncontrolled Resource Consumption",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-11-25T11:09:48.448Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/57855"
        },
        {
          "url": "https://go.dev/cl/468135"
        },
        {
          "url": "https://go.dev/cl/468295"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/V0aBFqaFs_E"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2023-1571"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4MA5XS5DAOJ5PKKNG5TUXKPQOFHT5VBC/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RLBQ3A7ROLEQXQLXFDLNJ7MYPKG5GULE/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RGW7GE2Z32ZT47UFAQFDRQE33B7Q7LMT/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XX3IMUTZKRQ73PBZM4E2JP4BKYH4C6XE/"
        },
        {
          "url": "https://www.couchbase.com/alerts/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4BUK2ZIAGCULOOYDNH25JPU6JBES5NF2/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T7N5GV4CHH6WAGX3GFMDD3COEOVCZ4RI/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/REMHVVIBDNKSRKNOTV7EQSB7CYQWOUOU/"
        },
        {
          "url": "https://security.gentoo.org/glsa/202311-09"
        }
      ],
      "title": "Denial of service via crafted HTTP/2 stream in net/http and golang.org/x/net"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2022-41723",
    "datePublished": "2023-02-28T17:19:45.801Z",
    "dateReserved": "2022-09-28T17:00:06.610Z",
    "dateUpdated": "2025-05-05T16:12:28.159Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

RHSA-2023:3447

CVE-2021-28235 (GCVE-0-2021-28235)

CVE-2022-41723 (GCVE-0-2022-41723)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour