Vulnerability-Lookup

CVE-2023-27492 (GCVE-0-2023-27492)

Vulnerability from cvelistv5 – Published: 2023-04-04 18:34 – Updated: 2025-02-11 16:13

Title

Envoy may crash when a large request body is processed in Lua filter

Summary

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, the Lua filter is vulnerable to denial of service. Attackers can send large request bodies for routes that have Lua filter enabled and trigger crashes. As of versions versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, Envoy no longer invokes the Lua coroutine if the filter has been reset. As a workaround for those whose Lua filter is buffering all requests/ responses, mitigate by using the buffer filter to avoid triggering the local reply in the Lua filter.

Severity

4.8 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-11 16:13 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/envoyproxy/envoy/security/advi…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
envoyproxy	envoy	Affected: >= 1.25.0, < 1.25.3 Affected: >= 1.24.0, < 1.24.4 Affected: >= 1.23.0, < 1.23.6 Affected: < 1.22.9	guessed

Show details on NVD website

JSON

To clipboard

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bit-envoy-2023-27492

Vulnerability from bitnami_vulndb

Published

2024-03-06 10:54

Modified

2026-09-08 08:34

Summary

Envoy may crash when a large request body is processed in Lua filter

Details

As of versions versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, Envoy no longer invokes the Lua coroutine if the filter has been reset. As a workaround for those whose Lua filter is buffering all requests/ responses, mitigate by using the buffer filter to avoid triggering the local reply in the Lua filter.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "envoy",
        "purl": "pkg:bitnami/envoy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.22.9"
            },
            {
              "introduced": "1.23.0"
            },
            {
              "fixed": "1.23.6"
            },
            {
              "introduced": "1.24.0"
            },
            {
              "fixed": "1.24.4"
            },
            {
              "introduced": "1.25.0"
            },
            {
              "fixed": "1.25.3"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-27492"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, the Lua filter is vulnerable to denial of service. Attackers can send large request bodies for routes that have Lua filter enabled and trigger crashes.\n\nAs of versions versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, Envoy no longer invokes the Lua coroutine if the filter has been reset. As a workaround for those whose Lua filter is buffering all requests/ responses, mitigate by using the buffer filter to avoid triggering the local reply in the Lua filter.",
  "id": "BIT-envoy-2023-27492",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2024-03-06T10:54:01.303Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-wpc2-2jp6-ppg2"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-27492"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "Envoy may crash when a large request body is processed in Lua filter"
}

FKIE_CVE-2023-27492

Vulnerability from fkie_nvd - Published: 2023-04-04 19:15 - Updated: 2026-06-17 05:45

Severity

4.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/envoyproxy/envoy/security/advisories/GHSA-wpc2-2jp6-ppg2	Exploit, Vendor Advisory
	af854a3a-2127-422b-91ae-364da2661108	https://github.com/envoyproxy/envoy/security/advisories/GHSA-wpc2-2jp6-ppg2	Exploit, Vendor Advisory

Impacted products

Vendor	Product	Version
envoyproxy	envoy	*
envoyproxy	envoy	*
envoyproxy	envoy	*
envoyproxy	envoy	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "envoy",
          "vendor": "envoyproxy",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.25.0, \u003c 1.25.3"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.24.0, \u003c 1.24.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.23.0, \u003c 1.23.6"
            },
            {
              "status": "affected",
              "version": "\u003c 1.22.9"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DAD93214-C958-4A69-9291-15D1C22CFD3F",
              "versionEndExcluding": "1.22.9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "17BFB303-DA5A-4E83-93F7-3C1EA340E434",
              "versionEndExcluding": "1.23.6",
              "versionStartIncluding": "1.23.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "92B633B8-FA4A-4630-9302-96F2C8336E36",
              "versionEndExcluding": "1.24.4",
              "versionStartIncluding": "1.24.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8AFC6741-6FDF-47F6-A4AF-B5F5233ABB71",
              "versionEndExcluding": "1.25.3",
              "versionStartIncluding": "1.25.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, the Lua filter is vulnerable to denial of service. Attackers can send large request bodies for routes that have Lua filter enabled and trigger crashes.\n\nAs of versions versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, Envoy no longer invokes the Lua coroutine if the filter has been reset. As a workaround for those whose Lua filter is buffering all requests/ responses, mitigate by using the buffer filter to avoid triggering the local reply in the Lua filter."
    }
  ],
  "id": "CVE-2023-27492",
  "lastModified": "2026-06-17T05:45:19.623",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-27492",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-02-11T16:13:50.435366Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2023-04-04T19:15:07.217",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-wpc2-2jp6-ppg2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-wpc2-2jp6-ppg2"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GSD-2023-27492

Vulnerability from gsd - Updated: 2023-12-13 01:20

Details

Aliases

CVE-2023-27492

Aliases

CVE-2023-27492

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2023-27492",
    "id": "GSD-2023-27492"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-27492"
      ],
      "details": "Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, the Lua filter is vulnerable to denial of service. Attackers can send large request bodies for routes that have Lua filter enabled and trigger crashes. As of versions versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, Envoy no longer invokes the Lua coroutine if the filter has been reset. As a workaround for those whose Lua filter is buffering all requests/ responses, mitigate by using the buffer filter to avoid triggering the local reply in the Lua filter.",
      "id": "GSD-2023-27492",
      "modified": "2023-12-13T01:20:55.904178Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2023-27492",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "envoy",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "=",
                          "version_value": "\u003e= 1.25.0, \u003c 1.25.3"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "\u003e= 1.24.0, \u003c 1.24.4"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "\u003e= 1.23.0, \u003c 1.23.6"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "\u003c 1.22.9"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "envoyproxy"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
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            "lang": "eng",
            "value": "Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, the Lua filter is vulnerable to denial of service. Attackers can send large request bodies for routes that have Lua filter enabled and trigger crashes. As of versions versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, Envoy no longer invokes the Lua coroutine if the filter has been reset. As a workaround for those whose Lua filter is buffering all requests/ responses, mitigate by using the buffer filter to avoid triggering the local reply in the Lua filter."
          }
        ]
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "cweId": "CWE-770",
                "lang": "eng",
                "value": "CWE-770: Allocation of Resources Without Limits or Throttling"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-wpc2-2jp6-ppg2",
            "refsource": "MISC",
            "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-wpc2-2jp6-ppg2"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-wpc2-2jp6-ppg2",
        "discovery": "UNKNOWN"
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.25.3",
                "versionStartIncluding": "1.25.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.24.4",
                "versionStartIncluding": "1.24.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.23.6",
                "versionStartIncluding": "1.23.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.22.9",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
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          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2023-27492"
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        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, the Lua filter is vulnerable to denial of service. Attackers can send large request bodies for routes that have Lua filter enabled and trigger crashes. As of versions versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, Envoy no longer invokes the Lua coroutine if the filter has been reset. As a workaround for those whose Lua filter is buffering all requests/ responses, mitigate by using the buffer filter to avoid triggering the local reply in the Lua filter."
            }
          ]
        },
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        "references": {
          "reference_data": [
            {
              "name": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-wpc2-2jp6-ppg2",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Vendor Advisory"
              ],
              "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-wpc2-2jp6-ppg2"
            }
          ]
        }
      },
      "impact": {
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-04-11T14:43Z",
      "publishedDate": "2023-04-04T19:15Z"
    }
  }
}

RHSA-2023:4623

Vulnerability from csaf_redhat - Published: 2023-08-11 16:46 - Updated: 2026-03-18 02:24

Summary

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 2.2.9 security update

Severity

Important

Scope

6 vulnerabilities in this advisory, including CVE-2023-27492.

CVE-2023-27492

A flaw was found in Envoy. This issue may allow attackers to send large request bodies for routes that have the Lua filter enabled, which will trigger a crash.

4.8 (Medium)


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

Fixed: 3 products Known not affected: 18 products

https://access.redhat.com/errata/RHSA-2023:4623

Open the full advisory

RHSA-2023_4623

Vulnerability from csaf_redhat - Published: 2023-08-11 16:46 - Updated: 2024-11-23 00:00

Summary

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 2.2.9 security update

Severity

Important

Scope

6 vulnerabilities in this advisory, including CVE-2023-27492.

CVE-2023-27492

A flaw was found in Envoy. This issue may allow attackers to send large request bodies for routes that have the Lua filter enabled, which will trigger a crash.

4.8 (Medium)


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

Fixed: 3 products Known not affected: 18 products

https://access.redhat.com/errata/RHSA-2023:4623

Open the full advisory

WID-SEC-W-2023-2058

Vulnerability from csaf_certbund - Published: 2023-08-13 22:00 - Updated: 2023-10-08 22:00

Summary

Red Hat OpenShift Service Mesh und Service Mesh Containers: Mehrere Schwachstellen

Severity

Hoch

Scope

11 vulnerabilities in this advisory, including CVE-2023-27492.

CVE-2023-27492

In Red Hat OpenShift Service Mesh und Service Mesh Containers, sowie Red Hat Enterprise Linux existieren mehrere Schwachstellen in der Komponente "Envoy". Ein entfernter, anonymer Angreifer kann diese Schwachstellen ausnutzen, um einen Denial of Service Zustand herbeizuführen, Dateien zu manipulieren, Sicherheitsvorkehrungen zu umgehen oder Informationen offenzulegen.

Known affected: 4 products

Open the full advisory

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.

Action not permitted

CVE-2023-27492 (GCVE-0-2023-27492)

bit-envoy-2023-27492

Vulnerability from bitnami_vulndb

FKIE_CVE-2023-27492

GSD-2023-27492

RHSA-2023:4623

RHSA-2023_4623

WID-SEC-W-2023-2058

Tags

Sightings

Nomenclature