github - ghsa-9wxc-375c-cvq2

GHSA-9WXC-375C-CVQ2

Vulnerability from github – Published: 2021-11-23 00:00 – Updated: 2021-11-27 00:00

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-43557"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-11-22T09:15:00Z",
    "severity": "HIGH"
  },
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  "id": "GHSA-9wxc-375c-cvq2",
  "modified": "2021-11-27T00:00:25Z",
  "published": "2021-11-23T00:00:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-43557"
    },
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      "url": "https://lists.apache.org/thread/18jyd458ptocr31rnkjs71w4h366mv7h"
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    },
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    },
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}

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

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

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)

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JSON

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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

GHSA-9WXC-375C-CVQ2

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

Tags

Sightings

Nomenclature