Vulnerability-Lookup

SUSE-SU-2025:03021-1

Vulnerability from csaf_suse - Published: 2025-08-29 09:42 - Updated: 2025-08-29 09:42

Summary

Security update for netty

Severity

Important

Notes

Title of the patch: Security update for netty

Description of the patch: This update for netty fixes the following issues: - CVE-2025-55163: Fixed 'MadeYouReset' DoS attack in HTTP/2 protocol (including DNS over HTTPS) (bsc#1247991)

Patchnames: SUSE-2025-3021,SUSE-SLE-Product-SUSE-Manager-Server-4.3-LTS-2025-3021

CVE-2025-55163

7.5 (High)


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

Affected products

Recommended 1 product

Product	Identifier	Version	Remediation
Unresolved product id: SUSE Manager Server LTS 4.3:netty-4.1.44.Final-150400.3.9.1.noarch		—	Vendor Fix

Threats

Impact important

References

10 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-updates/2025…	self
https://bugzilla.suse.com/1247991	self
https://www.suse.com/security/cve/CVE-2025-55163/	self
https://www.suse.com/security/cve/CVE-2025-55163	external
https://bugzilla.suse.com/1243888	external
https://bugzilla.suse.com/1244252	external
https://bugzilla.suse.com/1247991	external

JSON

To clipboard

{
  "document": {
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      "text": "important"
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        "text": "This update for netty fixes the following issues:\n\n- CVE-2025-55163: Fixed \u0027MadeYouReset\u0027 DoS attack in HTTP/2 \n  protocol (including DNS over HTTPS) (bsc#1247991)\n",
        "title": "Description of the patch"
      },
      {
        "category": "details",
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      {
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    "title": "Security update for netty",
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          "number": "1",
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  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "netty-4.1.44.Final-150400.3.9.1.noarch",
                "product": {
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        {
          "category": "general",
          "text": "Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.124.Final and 4.2.4.Final, Netty is vulnerable to MadeYouReset DDoS. This is a logical vulnerability in the HTTP/2 protocol, that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit - which results in resource exhaustion and distributed denial of service. This issue has been patched in versions 4.1.124.Final and 4.2.4.Final.",
          "title": "CVE description"
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      "references": [
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          "category": "external",
          "summary": "CVE-2025-55163",
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        },
        {
          "category": "external",
          "summary": "SUSE Bug 1243888 for CVE-2025-55163",
          "url": "https://bugzilla.suse.com/1243888"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1244252 for CVE-2025-55163",
          "url": "https://bugzilla.suse.com/1244252"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1247991 for CVE-2025-55163",
          "url": "https://bugzilla.suse.com/1247991"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Manager Server LTS 4.3:netty-4.1.44.Final-150400.3.9.1.noarch"
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            "version": "3.1"
          },
          "products": [
            "SUSE Manager Server LTS 4.3:netty-4.1.44.Final-150400.3.9.1.noarch"
          ]
        }
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      ],
      "title": "CVE-2025-55163"
    }
  ]
}

CVE-2025-55163 (GCVE-0-2025-55163)

Vulnerability from cvelistv5 – Published: 2025-08-13 14:17 – Updated: 2025-11-04 21:13

Title

Netty MadeYouReset HTTP/2 DDoS Vulnerability

Summary

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.124.Final and 4.2.4.Final, Netty is vulnerable to MadeYouReset DDoS. This is a logical vulnerability in the HTTP/2 protocol, that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit - which results in resource exhaustion and distributed denial of service. This issue has been patched in versions 4.1.124.Final and 4.2.4.Final.

Severity

8.2 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-08-13 14:37 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/netty/netty/security/advisorie…	x_refsource_CONFIRM
https://www.kb.cert.org/vuls/id/767506
http://www.openwall.com/lists/oss-security/2025/08/16/1

Impacted products

1 product

Vendor	Product	Version
netty	netty	Affected: < 4.1.124.Final Affected: < 4.2.4.Final

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-55163",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-13T14:37:06.148395Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-13T14:37:20.727Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T21:13:02.288Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://www.kb.cert.org/vuls/id/767506"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/08/16/1"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "netty",
          "vendor": "netty",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.1.124.Final"
            },
            {
              "status": "affected",
              "version": "\u003c 4.2.4.Final"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.124.Final and 4.2.4.Final, Netty is vulnerable to MadeYouReset DDoS. This is a logical vulnerability in the HTTP/2 protocol, that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit - which results in resource exhaustion and distributed denial of service. This issue has been patched in versions 4.1.124.Final and 4.2.4.Final."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-13T14:17:36.111Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/netty/netty/security/advisories/GHSA-prj3-ccx8-p6x4"
        }
      ],
      "source": {
        "advisory": "GHSA-prj3-ccx8-p6x4",
        "discovery": "UNKNOWN"
      },
      "title": "Netty MadeYouReset HTTP/2 DDoS Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-55163",
    "datePublished": "2025-08-13T14:17:36.111Z",
    "dateReserved": "2025-08-07T18:27:23.307Z",
    "dateUpdated": "2025-11-04T21:13:02.288Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

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.