Vulnerability-Lookup

RHSA-2024:3875

Vulnerability from csaf_redhat - Published: 2024-06-12 22:33 - Updated: 2026-10-15 02:29

Summary

Red Hat Security Advisory: nghttp2 security update

Severity

Moderate

Notes

Topic: An update for nghttp2 is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions. 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.

Details: libnghttp2 is a library implementing the Hypertext Transfer Protocol version 2 (HTTP/2) protocol in C. Security Fix(es): * nghttp2: CONTINUATION frames DoS (CVE-2024-28182,VU#421644.5) 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.

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-2024-28182

A vulnerability was found in how nghttp2 implements the HTTP/2 protocol. There are insufficient limitations placed on the amount of CONTINUATION frames that can be sent within a single stream. This issue could allow an unauthenticated remote attacker to send packets to vulnerable servers, which could use up compute or memory resources to cause a Denial of Service.

5.3 (Medium)


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

CWE-390 - Detection of Error Condition Without Action

Affected products

Fixed 21 products

Product	Version	Remediation
Unresolved product id: BaseOS-9.0.0.Z.E4S:libnghttp2-0:1.43.0-5.el9_0.3.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:libnghttp2-0:1.43.0-5.el9_0.3.i686	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:libnghttp2-0:1.43.0-5.el9_0.3.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:libnghttp2-0:1.43.0-5.el9_0.3.s390x	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:libnghttp2-0:1.43.0-5.el9_0.3.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:libnghttp2-debuginfo-0:1.43.0-5.el9_0.3.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:libnghttp2-debuginfo-0:1.43.0-5.el9_0.3.i686	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:libnghttp2-debuginfo-0:1.43.0-5.el9_0.3.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:libnghttp2-debuginfo-0:1.43.0-5.el9_0.3.s390x	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:libnghttp2-debuginfo-0:1.43.0-5.el9_0.3.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:nghttp2-0:1.43.0-5.el9_0.3.src	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:nghttp2-debuginfo-0:1.43.0-5.el9_0.3.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:nghttp2-debuginfo-0:1.43.0-5.el9_0.3.i686	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:nghttp2-debuginfo-0:1.43.0-5.el9_0.3.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:nghttp2-debuginfo-0:1.43.0-5.el9_0.3.s390x	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:nghttp2-debuginfo-0:1.43.0-5.el9_0.3.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:nghttp2-debugsource-0:1.43.0-5.el9_0.3.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:nghttp2-debugsource-0:1.43.0-5.el9_0.3.i686	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:nghttp2-debugsource-0:1.43.0-5.el9_0.3.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:nghttp2-debugsource-0:1.43.0-5.el9_0.3.s390x	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.0.0.Z.E4S:nghttp2-debugsource-0:1.43.0-5.el9_0.3.x86_64	—	Vendor Fix fix Workaround

Threats

Impact Moderate

References

11 references

URL	Category
https://access.redhat.com/errata/RHSA-2024:3875	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2268639	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2024-28182	self
https://bugzilla.redhat.com/show_bug.cgi?id=2268639	external
https://www.cve.org/CVERecord?id=CVE-2024-28182	external
https://nvd.nist.gov/vuln/detail/CVE-2024-28182	external
https://github.com/nghttp2/nghttp2/security/advis…	external
https://nowotarski.info/http2-continuation-flood/	external
https://www.kb.cert.org/vuls/id/421644	external

Acknowledgments

nowotarski.info Bartek Nowotarski

JSON

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            "BaseOS-9.0.0.Z.E4S:nghttp2-debuginfo-0:1.43.0-5.el9_0.3.x86_64",
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            "BaseOS-9.0.0.Z.E4S:nghttp2-debugsource-0:1.43.0-5.el9_0.3.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "nghttp2: CONTINUATION frames DoS"
    }
  ]
}

CVE-2024-28182 (GCVE-0-2024-28182)

Vulnerability from cvelistv5 – Published: 2024-04-04 14:41 – Updated: 2026-10-15 00:40

Title

Reading unbounded number of HTTP/2 CONTINUATION frames to cause excessive CPU usage

Summary

nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. The nghttp2 library prior to version 1.61.0 keeps reading the unbounded number of HTTP/2 CONTINUATION frames even after a stream is reset to keep HPACK context in sync. This causes excessive CPU usage to decode HPACK stream. nghttp2 v1.61.0 mitigates this vulnerability by limiting the number of CONTINUATION frames it accepts per stream. There is no workaround for this vulnerability.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-04-04 17:15 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 8036 records in the last 180 days details

References

12 references

URL	Tags
https://github.com/nghttp2/nghttp2/security/advis…	x_refsource_CONFIRM
https://github.com/nghttp2/nghttp2/commit/00201ec…	x_refsource_MISC
https://github.com/nghttp2/nghttp2/commit/d71a466…	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.debian.org/debian-lts-announce/2024…
http://www.openwall.com/lists/oss-security/2024/0…
https://lists.debian.org/debian-lts-announce/2024…
https://www.kb.cert.org/vuls/id/421644
https://cert-portal.siemens.com/productcert/html/…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

6 products

Vendor	Product	Version
nghttp2	nghttp2	Affected: < 1.61.0
nghttp2	nghttp2	Affected: 0 , < 1.61.0 (custom) cpe:2.3:a:nghttp2:nghttp2::::::::
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)
Siemens	SINEC NMS	Affected: 0 , < V3.0 (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)

Show details on NVD website

JSON

To clipboard

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  "containers": {
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        "affected": [
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}

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.

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