pysec - pysec-2024-26

pysec-2024-26

Vulnerability from pysec

Published

2024-01-29 23:15

Modified

2024-02-06 20:20

Severity

6.5 (Medium) - CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Details

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Security-sensitive parts of the Python HTTP parser retained minor differences in allowable character sets, that must trigger error handling to robustly match frame boundaries of proxies in order to protect against injection of additional requests. Additionally, validation could trigger exceptions that were not handled consistently with processing of other malformed input. Being more lenient than internet standards require could, depending on deployment environment, assist in request smuggling. The unhandled exception could cause excessive resource consumption on the application server and/or its logging facilities. This vulnerability exists due to an incomplete fix for CVE-2023-47627. Version 3.9.2 fixes this vulnerability.

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "aiohttp",
        "purl": "pkg:pypi/aiohttp"
      },
      "ranges": [
        {
          "events": [
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            {
              "fixed": "33ccdfb0a12690af5bb49bda2319ec0907fa7827"
            }
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          "repo": "https://github.com/aio-libs/aiohttp",
          "type": "GIT"
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        "3.6.0a2",
        "3.6.0a3",
        "3.6.0a4",
        "3.6.0a5",
        "3.6.0a6",
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        "3.8.0a7",
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        "3.8.3",
        "3.8.4",
        "3.8.5",
        "3.8.6",
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        "3.9.0b0",
        "3.9.0b1",
        "3.9.0rc0",
        "3.9.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2024-23829",
    "GHSA-8qpw-xqxj-h4r2"
  ],
  "details": "aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Security-sensitive parts of the Python HTTP parser retained minor differences in allowable character sets, that must trigger error handling to robustly match frame boundaries of proxies in order to protect against injection of additional requests. Additionally, validation could trigger exceptions that were not handled consistently with processing of other malformed input.  Being more lenient than internet standards require could, depending on deployment environment, assist in request smuggling. The unhandled exception could cause excessive resource consumption on the application server and/or its logging facilities. This vulnerability exists due to an incomplete fix for CVE-2023-47627. Version 3.9.2 fixes this vulnerability.",
  "id": "PYSEC-2024-26",
  "modified": "2024-02-06T20:20:18.162431+00:00",
  "published": "2024-01-29T23:15:00+00:00",
  "references": [
    {
      "type": "EVIDENCE",
      "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-8qpw-xqxj-h4r2"
    },
    {
      "type": "FIX",
      "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-8qpw-xqxj-h4r2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-8qpw-xqxj-h4r2"
    },
    {
      "type": "FIX",
      "url": "https://github.com/aio-libs/aiohttp/pull/8074"
    },
    {
      "type": "FIX",
      "url": "https://github.com/aio-libs/aiohttp/commit/33ccdfb0a12690af5bb49bda2319ec0907fa7827"
    },
    {
      "type": "ARTICLE",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XXWVZIVAYWEBHNRIILZVB3R3SDQNNAA7/"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

ghsa-8qpw-xqxj-h4r2

Vulnerability from github

Published

2024-01-29 22:30

Modified

2024-09-04 19:51

Severity

6.5 (Medium) - CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
6.9 (Medium) - CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

Summary

aiohttp's HTTP parser (the python one, not llhttp) still overly lenient about separators

Details

Summary

Security-sensitive parts of the Python HTTP parser retained minor differences in allowable character sets, that must trigger error handling to robustly match frame boundaries of proxies in order to protect against injection of additional requests. Additionally, validation could trigger exceptions that were not handled consistently with processing of other malformed input.

Details

These problems are rooted in pattern matching protocol elements, previously improved by PR #3235 and GHSA-gfw2-4jvh-wgfg:

The expression HTTP/(\d).(\d) lacked another backslash to clarify that the separator should be a literal dot, not just any Unicode code point (result: HTTP/(\d)\.(\d)).
The HTTP version was permitting Unicode digits, where only ASCII digits are standards-compliant.
Distinct regular expressions for validating HTTP Method and Header field names were used - though both should (at least) apply the common restrictions of rfc9110 token.

PoC

GET / HTTP/1ö1 GET / HTTP/1.𝟙 GET/: HTTP/1.1 Content-Encoding?: chunked

Impact

Primarily concerns running an aiohttp server without llhttp: 1. behind a proxy: Being more lenient than internet standards require could, depending on deployment environment, assist in request smuggling. 2. directly accessible or exposed behind proxies relaying malformed input: the unhandled exception could cause excessive resource consumption on the application server and/or its logging facilities.

Patch: https://github.com/aio-libs/aiohttp/pull/8074/files

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "aiohttp"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.9.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-23829"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-444"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-01-29T22:30:07Z",
    "nvd_published_at": "2024-01-29T23:15:08Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\nSecurity-sensitive parts of the *Python HTTP parser* retained minor differences in allowable character sets, that must trigger error handling to robustly match frame boundaries of proxies in order to protect against injection of additional requests. Additionally, validation could trigger exceptions that were not handled consistently with processing of other malformed input.\n\n### Details\nThese problems are rooted in pattern matching protocol elements, previously improved by PR #3235 and GHSA-gfw2-4jvh-wgfg:\n\n1. The expression `HTTP/(\\d).(\\d)` lacked another backslash to clarify that the separator should be a literal dot, not just *any* Unicode code point (result: `HTTP/(\\d)\\.(\\d)`).\n\n2. The HTTP version was permitting Unicode digits, where only ASCII digits are standards-compliant.\n\n3. Distinct regular expressions for validating HTTP Method and Header field names were used - though both should (at least) apply the common restrictions of rfc9110 `token`.\n\n### PoC\n`GET / HTTP/1\u00f61`\n`GET / HTTP/1.\ud835\udfd9`\n`GET/: HTTP/1.1`\n`Content-Encoding?: chunked`\n\n### Impact\nPrimarily concerns running an aiohttp server without llhttp:\n 1. **behind a proxy**: Being more lenient than internet standards require could, depending on deployment environment, assist in request smuggling.\n 2. **directly accessible** or exposed behind proxies relaying malformed input: the unhandled exception could cause excessive resource consumption on the application server and/or its logging facilities.\n\n-----\n\nPatch: https://github.com/aio-libs/aiohttp/pull/8074/files",
  "id": "GHSA-8qpw-xqxj-h4r2",
  "modified": "2024-09-04T19:51:21Z",
  "published": "2024-01-29T22:30:07Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-8qpw-xqxj-h4r2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-gfw2-4jvh-wgfg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-23829"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/pull/3235"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/pull/8074"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/pull/8074/files"
    },
    {
      "type": "WEB",
      "url": "https://github.com/aio-libs/aiohttp/commit/33ccdfb0a12690af5bb49bda2319ec0907fa7827"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/aio-libs/aiohttp"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/aiohttp/PYSEC-2024-26.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ICUOCFGTB25WUT336BZ4UNYLSZOUVKBD"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XXWVZIVAYWEBHNRIILZVB3R3SDQNNAA7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "aiohttp\u0027s HTTP parser (the python one, not llhttp) still overly lenient about separators"
}

cve-2024-23829

Vulnerability from cvelistv5

Published

2024-01-29 22:41

Modified

2024-08-01 23:13

Severity

6.5 (Medium) - cvssV3_1 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Summary

aiohttp's HTTP parser (the python one, not llhttp) still overly lenient about separators

References

URL	Tags
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-8qpw-xqxj-h4r2	x_refsource_CONFIRM
https://github.com/aio-libs/aiohttp/pull/8074	x_refsource_MISC
https://github.com/aio-libs/aiohttp/commit/33ccdfb0a12690af5bb49bda2319ec0907fa7827	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XXWVZIVAYWEBHNRIILZVB3R3SDQNNAA7/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ICUOCFGTB25WUT336BZ4UNYLSZOUVKBD/

Impacted products

Vendor	Product
aio-libs	aiohttp

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-01T23:13:08.541Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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              "x_transferred"
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XXWVZIVAYWEBHNRIILZVB3R3SDQNNAA7/"
          },
          {
            "tags": [
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ICUOCFGTB25WUT336BZ4UNYLSZOUVKBD/"
          }
        ],
        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
        {
          "product": "aiohttp",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
            "version": "3.1"
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      "problemTypes": [
        {
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              "lang": "en",
              "type": "CWE"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2024-01-29T22:41:35.032Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
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        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XXWVZIVAYWEBHNRIILZVB3R3SDQNNAA7/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ICUOCFGTB25WUT336BZ4UNYLSZOUVKBD/"
        }
      ],
      "source": {
        "advisory": "GHSA-8qpw-xqxj-h4r2",
        "discovery": "UNKNOWN"
      },
      "title": " aiohttp\u0027s HTTP parser (the python one, not llhttp) still overly lenient about separators"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2024-23829",
    "datePublished": "2024-01-29T22:41:35.032Z",
    "dateReserved": "2024-01-22T22:23:54.338Z",
    "dateUpdated": "2024-08-01T23:13:08.541Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Action not permitted

pysec-2024-26

Vulnerability from pysec

ghsa-8qpw-xqxj-h4r2

Vulnerability from github

Summary

Details

PoC

Impact

cve-2024-23829

Vulnerability from cvelistv5

Tags