Vulnerability-Lookup

OESA-2021-1126 (CVE-2021-21240)

Vulnerability from osv_openeuler – Published: 2021-04-07 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

python-httplib2 security update

Details

httplib2 is a comprehensive HTTP client library, httplib2.py supports many features left out of other HTTP libraries.

Security Fix(es):

httplib2 is a comprehensive HTTP client library for Python. In httplib2 before version 0.19.0, a malicious server which responds with long series of "\xa0" characters in the "www-authenticate" header may cause Denial of Service (CPU burn while parsing header) of the httplib2 client accessing said server. This is fixed in version 0.19.0 which contains a new implementation of auth headers parsing using the pyparsing library.(CVE-2021-21240)

Severity

7.5 (High)


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

References

URL

Type

	https://openeuler.org/en/security/safety-bulletin…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-21240	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "noarch": [
          "python2-httplib2-0.19.0-1.oe1.noarch.rpm",
          "python3-httplib2-0.19.0-1.oe1.noarch.rpm",
          "python2-httplib2-0.19.0-1.oe1.noarch.rpm",
          "python3-httplib2-0.19.0-1.oe1.noarch.rpm"
        ],
        "src": [
          "python-httplib2-0.19.0-1.oe1.src.rpm",
          "python-httplib2-0.19.0-1.oe1.src.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS",
        "name": "python-httplib2",
        "purl": "pkg:rpm/openEuler/python-httplib2\u0026distro=openEuler-20.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.19.0-1.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "noarch": [
          "python2-httplib2-0.19.0-1.oe1.noarch.rpm",
          "python3-httplib2-0.19.0-1.oe1.noarch.rpm"
        ],
        "src": [
          "python-httplib2-0.19.0-1.oe1.src.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "python-httplib2",
        "purl": "pkg:rpm/openEuler/python-httplib2\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.19.0-1.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "httplib2 is a comprehensive HTTP client library, httplib2.py supports many features left out of other HTTP libraries.\r\n\r\nSecurity Fix(es):\r\n\r\nhttplib2 is a comprehensive HTTP client library for Python. In httplib2 before version 0.19.0, a malicious server which responds with long series of \u0026quot;\\xa0\u0026quot; characters in the \u0026quot;www-authenticate\u0026quot; header may cause Denial of Service (CPU burn while parsing header) of the httplib2 client accessing said server. This is fixed in version 0.19.0 which contains a new implementation of auth headers parsing using the pyparsing library.(CVE-2021-21240)",
  "id": "OESA-2021-1126",
  "modified": "2026-08-06T11:04:22Z",
  "published": "2021-04-07T11:04:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1126"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21240"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "python-httplib2 security update",
  "upstream": [
    "CVE-2021-21240"
  ]
}

CVE-2021-21240 (GCVE-0-2021-21240)

Vulnerability from cvelistv5 – Published: 2021-02-08 19:45 – Updated: 2024-08-03 18:09

Title

Regular Expression Denial of Service in httplib2

Summary

Severity

7.5 (High)


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

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M mitre root Scorecard

References

4 references

URL	Tags
https://github.com/httplib2/httplib2/security/adv…	x_refsource_CONFIRM
https://github.com/httplib2/httplib2/pull/182	x_refsource_MISC
https://github.com/httplib2/httplib2/commit/bd9ee…	x_refsource_MISC
https://pypi.org/project/httplib2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
httplib2	httplib2	Affected: < 0.19.0

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-03T18:09:14.827Z",
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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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2021-1126 (CVE-2021-21240)

CVE-2021-21240 (GCVE-0-2021-21240)

Tags

Sightings

Nomenclature

Related by attack behaviour