Vulnerability-Lookup

RHSA-2025:8288

Vulnerability from csaf_redhat - Published: 2025-05-29 06:28 - Updated: 2026-10-16 10:56

Summary

Red Hat Security Advisory: pcs security update

Severity

Important

Notes

Topic: An update for pcs is now available for Red Hat Enterprise Linux 9.4 Extended Update Support. 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: The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities. Security Fix(es): * rubygem-rack: Unbounded-Parameter DoS in Rack::QueryParser (CVE-2025-46727) 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-2025-46727

A flaw was found in Rack::QueryParser. This vulnerability allows denial of service via oversized HTTP requests containing many parameters, resulting in memory exhaustion that consumes all available memory or CPU resource pinning, which keeps the CPU constantly busy.

7.5 (High)


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

CWE-770 - Allocation of Resources Without Limits or Throttling

Affected products

Fixed 16 products

Product	Version	Remediation
Unresolved product id: HighAvailability-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: HighAvailability-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: HighAvailability-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.s390x	—	Vendor Fix fix Workaround
Unresolved product id: HighAvailability-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.src	—	Vendor Fix fix Workaround
Unresolved product id: HighAvailability-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: HighAvailability-9.4.0.Z.EUS:pcs-snmp-0:0.11.7-2.el9_4.4.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: HighAvailability-9.4.0.Z.EUS:pcs-snmp-0:0.11.7-2.el9_4.4.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: HighAvailability-9.4.0.Z.EUS:pcs-snmp-0:0.11.7-2.el9_4.4.s390x	—	Vendor Fix fix Workaround
Unresolved product id: HighAvailability-9.4.0.Z.EUS:pcs-snmp-0:0.11.7-2.el9_4.4.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: ResilientStorage-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: ResilientStorage-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.s390x	—	Vendor Fix fix Workaround
Unresolved product id: ResilientStorage-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.src	—	Vendor Fix fix Workaround
Unresolved product id: ResilientStorage-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: ResilientStorage-9.4.0.Z.EUS:pcs-snmp-0:0.11.7-2.el9_4.4.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: ResilientStorage-9.4.0.Z.EUS:pcs-snmp-0:0.11.7-2.el9_4.4.s390x	—	Vendor Fix fix Workaround
Unresolved product id: ResilientStorage-9.4.0.Z.EUS:pcs-snmp-0:0.11.7-2.el9_4.4.x86_64	—	Vendor Fix fix Workaround

Threats

Impact Important

References

12 references

URL	Category
https://access.redhat.com/errata/RHSA-2025:8288	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2364966	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2025-46727	self
https://bugzilla.redhat.com/show_bug.cgi?id=2364966	external
https://www.cve.org/CVERecord?id=CVE-2025-46727	external
https://nvd.nist.gov/vuln/detail/CVE-2025-46727	external
https://github.com/rack/rack/commit/2bb5263b464b6…	external
https://github.com/rack/rack/commit/3f5a4249118d0…	external
https://github.com/rack/rack/commit/cd6b70a1f2a10…	external
https://github.com/rack/rack/security/advisories/…	external

JSON

To clipboard

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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-46727",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "discovery_date": "2025-05-08T00:00:45.681503+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2364966"
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        {
          "category": "description",
          "text": "A flaw was found in Rack::QueryParser. This vulnerability allows denial of service via oversized HTTP requests containing many parameters, resulting in memory exhaustion that consumes all available memory or CPU resource pinning, which keeps the CPU constantly busy.",
          "title": "Vulnerability description"
        },
        {
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          "text": "rubygem-rack: Unbounded-Parameter DoS in Rack::QueryParser",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated as an IMPORTANT severity because the vulnerabilty was found in the Rack::QueryParser component which arises because Rack::QueryParser parses query strings and application/x-www-form-urlencoded bodies into Ruby data structures without imposing any limit on the number of parameters, when an attacker sends requests with an extremely large number of parameters, Rack::QueryParser consumes excessive memory and CPU during parsing, leading to memory exhaustion, this results in a denial of service, causing the Rack server to crash and leading to full service disruption.\n\nRed Hat Satellite 6.15 includes an affected version of rubygem-rack; however, since it does not utilize Rack::QueryParser, it is not actually vulnerable to the flaw, lowering product-specific impact. The issue has already been addressed in Red Hat Satellite versions 6.16 and 6.17, and updates for other supported versions may follow based on the product lifecycle policy.",
          "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"
        }
      ],
      "product_status": {
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        {
          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-46727"
        },
        {
          "category": "external",
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        {
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        {
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          "url": "https://github.com/rack/rack/commit/cd6b70a1f2a1016b73dc906f924869f4902c2d74"
        },
        {
          "category": "external",
          "summary": "https://github.com/rack/rack/security/advisories/GHSA-gjh7-p2fx-99vx",
          "url": "https://github.com/rack/rack/security/advisories/GHSA-gjh7-p2fx-99vx"
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      "release_date": "2025-05-07T23:07:40.563000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-05-29T06:28:46+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "HighAvailability-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.aarch64",
            "HighAvailability-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.ppc64le",
            "HighAvailability-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.s390x",
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            "ResilientStorage-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.x86_64",
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          "url": "https://access.redhat.com/errata/RHSA-2025:8288"
        },
        {
          "category": "workaround",
          "details": "This issue can be mitigated without upgrading by preventing oversized requests from reaching Rack. Deploy a reverse proxy (such as Nginx) in front of the application to limit request sizes and reject oversized query strings or bodies, use Rack middleware to enforce a maximum query string size or parameter count, or limit request body sizes and query string lengths at the web server or CDN level. These measures prevent a single request containing an extremely large number of parameters from consuming excessive memory or CPU during query parsing. For a permanent fix, update to a version of Rack that limits the number of parsed parameters (upstream Rack versions 2.2.14, 3.0.16, and 3.1.14 address this issue).",
          "product_ids": [
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            "ResilientStorage-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.s390x",
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            "ResilientStorage-9.4.0.Z.EUS:pcs-0:0.11.7-2.el9_4.4.x86_64",
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            "ResilientStorage-9.4.0.Z.EUS:pcs-snmp-0:0.11.7-2.el9_4.4.s390x",
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          ]
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "rubygem-rack: Unbounded-Parameter DoS in Rack::QueryParser"
    }
  ]
}

CVE-2025-46727 (GCVE-0-2025-46727)

Vulnerability from cvelistv5 – Published: 2025-05-07 23:07 – Updated: 2025-05-08 14:01

Title

Unbounded-Parameter DoS in Rack::QueryParser

Summary

Rack is a modular Ruby web server interface. Prior to versions 2.2.14, 3.0.16, and 3.1.14, `Rack::QueryParser` parses query strings and `application/x-www-form-urlencoded` bodies into Ruby data structures without imposing any limit on the number of parameters, allowing attackers to send requests with extremely large numbers of parameters. The vulnerability arises because `Rack::QueryParser` iterates over each `&`-separated key-value pair and adds it to a Hash without enforcing an upper bound on the total number of parameters. This allows an attacker to send a single request containing hundreds of thousands (or more) of parameters, which consumes excessive memory and CPU during parsing. An attacker can trigger denial of service by sending specifically crafted HTTP requests, which can cause memory exhaustion or pin CPU resources, stalling or crashing the Rack server. This results in full service disruption until the affected worker is restarted. Versions 2.2.14, 3.0.16, and 3.1.14 fix the issue. Some other mitigations are available. One may use middleware to enforce a maximum query string size or parameter count, or employ a reverse proxy (such as Nginx) to limit request sizes and reject oversized query strings or bodies. Limiting request body sizes and query string lengths at the web server or CDN level is an effective mitigation.

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 2025-05-08 14:00 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 8035 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/rack/rack/security/advisories/…	x_refsource_CONFIRM
https://github.com/rack/rack/commit/2bb5263b464b6…	x_refsource_MISC
https://github.com/rack/rack/commit/3f5a4249118d0…	x_refsource_MISC
https://github.com/rack/rack/commit/cd6b70a1f2a10…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
rack	rack	Affected: < 2.2.14 Affected: >= 3.0, < 3.0.16 Affected: >= 3.1, < 3.1.14

Show details on NVD website

JSON

To clipboard

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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

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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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