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CVE-2020-13950 (GCVE-0-2020-13950)

Vulnerability from cvelistv5 – Published: 2021-06-10 07:10 – Updated: 2024-08-04 12:32
VLAI
Title
mod_proxy_http NULL pointer dereference
Summary
Apache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service
Severity
No CVSS data available.
CWE
  • mod_proxy_http NULL pointer dereference
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache HTTP Server Affected: 2.4.46
Affected: 2.4.43
Affected: 2.4.41
guessed Create a notification for this product.
Show details on NVD website

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      "sourceIdentifier": "security@apache.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-476\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-13950\",\"sourceIdentifier\":\"security@apache.org\",\"published\":\"2021-06-10T07:15:07.440\",\"lastModified\":\"2024-11-21T05:02:13.150\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Apache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service\"},{\"lang\":\"es\",\"value\":\"Apache HTTP Server versiones 2.4.41 a 2.4.46 la funci\u00f3n mod_proxy_http puede bloquearse (desviaci\u00f3n del puntero NULL) con peticiones especialmente dise\u00f1adas que utilicen las encabezados Content-Length y Transfer-Encoding, provocando una denegaci\u00f3n de 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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T11:52:16+00:00",
      "cve": "CVE-2020-13950",
      "id": "CVE-2020-13950",
      "initial_release_date": "2020-01-01T00:00:00+00:00",
      "product_status:fixed": "228",
      "product_status:known_affected": "2",
      "product_status:known_not_affected": "37",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "httpd: mod_proxy NULL pointer dereference",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-13950.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-15T02:33:41Z",
      "cve": "CVE-2020-13950",
      "id": "CVE-2020-13950",
      "initial_release_date": "2023-02-15T03:58:08Z",
      "product_status:known_affected": "425",
      "product_status:known_not_affected": "198",
      "product_status:recommended": "198",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2020-13950",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-13950.json",
      "version": "36"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.

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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

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.


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