Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2024-03-06 10:51

Modified

2025-05-20 10:02

Summary

Path traversal in request_uri variable

Details

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.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "apisix",
        "purl": "pkg:bitnami/apisix"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.10.2"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-43557"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "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.",
  "id": "BIT-apisix-2021-43557",
  "modified": "2025-05-20T10:02:07.006Z",
  "published": "2024-03-06T10:51:17.884Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2021/11/22/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2021/11/22/2"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2021/11/23/1"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-43557"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "Path traversal in request_uri variable"
}

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

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

Title

Path traversal in request_uri variable

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.

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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    ],
    "cna": {
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        {
          "product": "Apache APISIX",
          "vendor": "Apache Software Foundation",
          "versions": [
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              "lessThan": "Apache APISIX 1.5*",
              "status": "affected",
              "version": "1.5",
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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

Vulnerability from bitnami_vulndb

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

Tags

Sightings

Nomenclature