fkie_nvd - fkie_cve-2021-43557

FKIE_CVE-2021-43557

Vulnerability from fkie_nvd - Published: 2021-11-22 09:15 - Updated: 2024-11-21 06:29

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

The uri-block plugin in Apache APISIX before 2.10.2 uses $request_uri without verification. The $request_uri is the full original request URI without normalization. This makes it possible to construct a URI to bypass the block list on some occasions. For instance, when the block list contains "^/internal/", a URI like `//internal/` can be used to bypass it. Some other plugins also have the same issue. And it may affect the developer's custom plugin.

References

URL	Tags
security@apache.org	http://www.openwall.com/lists/oss-security/2021/11/22/1	Mailing List, Third Party Advisory
security@apache.org	http://www.openwall.com/lists/oss-security/2021/11/22/2	Mailing List, Third Party Advisory
security@apache.org	http://www.openwall.com/lists/oss-security/2021/11/23/1	Exploit, Mailing List, Third Party Advisory
security@apache.org	https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h	Exploit, Mailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/11/22/1	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/11/22/2	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/11/23/1	Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h	Exploit, Mailing List, Vendor Advisory

Impacted products

	Vendor	Product	Version
	apache	apisix	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E6E300E2-7036-4813-B7A7-48F922753C76",
              "versionEndExcluding": "2.10.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The uri-block plugin in Apache APISIX before 2.10.2 uses $request_uri without verification. The $request_uri is the full original request URI without normalization. This makes it possible to construct a URI to bypass the block list on some occasions. For instance, when the block list contains \"^/internal/\", a URI like `//internal/` can be used to bypass it. Some other plugins also have the same issue. And it may affect the developer\u0027s custom plugin."
    },
    {
      "lang": "es",
      "value": "El plugin uri-block en Apache APISIX versiones anteriores a 2.10.2, usa $request_uri sin verificaci\u00f3n. La $request_uri es la URI original completa de la petici\u00f3n sin normalizar. Esto hace posible construir un URI para evitar la lista de bloqueo en algunas ocasiones. Por ejemplo, cuando la lista de bloqueo contiene \"^/internal/\", puede usarse una URI como \"//internal/\" para omitirla. Algunos otros plugins tambi\u00e9n presentan el mismo problema. Y puede afectar al plugin personalizado del desarrollador"
    }
  ],
  "id": "CVE-2021-43557",
  "lastModified": "2024-11-21T06:29:25.887",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-11-22T09:15:07.627",
  "references": [
    {
      "source": "security@apache.org",
      "tags": [
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        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2021/11/22/1"
    },
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      "source": "security@apache.org",
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    },
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      "tags": [
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        "Mailing List",
        "Third Party Advisory"
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    },
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        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2021/11/22/1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2021/11/22/2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2021/11/23/1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-43557 (GCVE-0-2021-43557)

Vulnerability from cvelistv5 – Published: 2021-11-22 08:25 – Updated: 2024-08-04 04:03

Summary

Severity ?

No CVSS data available.

CWE

Use Nginx's $request_uri variable without verification

Assigner

apache

References

URL

Tags

	https://lists.apache.org/thread/18jyd458ptocr31rn…	x_refsource_MISC
	http://www.openwall.com/lists/oss-security/2021/11/22/1	mailing-listx_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/11/22/2	mailing-listx_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/11/23/1	mailing-listx_refsource_MLIST

Impacted products

	Vendor	Product	Version
	Apache Software Foundation	Apache APISIX	Affected: 1.5 , < Apache APISIX 1.5* (custom)

Show details on NVD website

JSON

To clipboard

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          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Apache APISIX",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "Apache APISIX 1.5*",
              "status": "affected",
              "version": "1.5",
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      "metrics": [
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Sightings

Author	Source	Type	Date

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.

Action not permitted

FKIE_CVE-2021-43557

CVE-2021-43557 (GCVE-0-2021-43557)

Tags

Sightings

Nomenclature