CVE-2020-11985 (GCVE-0-2020-11985)

Vulnerability from cvelistv5 – Published: 2020-08-07 15:36 – Updated: 2024-08-04 11:48
VLAI
Summary
IP address spoofing when proxying using mod_remoteip and mod_rewrite For configurations using proxying with mod_remoteip and certain mod_rewrite rules, an attacker could spoof their IP address for logging and PHP scripts. Note this issue was fixed in Apache HTTP Server 2.4.24 but was retrospectively allocated a low severity CVE in 2020.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-345 - Insufficient verification of data authenticity
Assigner
References
Impacted products
Vendor Product Version
n/a Apache HTTP Server Affected: 2.4.1 to 2.4.23
Show details on NVD website
To clipboard 

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              "refsource": "MLIST",
              "url": "https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d@%3Ccvs.httpd.apache.org%3E"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2020-11985",
    "datePublished": "2020-08-07T15:36:31.000Z",
    "dateReserved": "2020-04-21T00:00:00.000Z",
    "dateUpdated": "2024-08-04T11:48:58.232Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2020-11985",
      "date": "2026-07-23",
      "epss": "0.06808",
      "percentile": "0.93314"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-11985\",\"sourceIdentifier\":\"security@apache.org\",\"published\":\"2020-08-07T16:15:11.810\",\"lastModified\":\"2024-11-21T04:59:03.163\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"IP address spoofing when proxying using mod_remoteip and mod_rewrite For configurations using proxying with mod_remoteip and certain mod_rewrite rules, an attacker could spoof their IP address for logging and PHP scripts. Note this issue was fixed in Apache HTTP Server 2.4.24 but was retrospectively allocated a low severity CVE in 2020.\"},{\"lang\":\"es\",\"value\":\"Una falsificaci\u00f3n de direcciones IP cuando se est\u00e1 usando un proxy por medio de mod_remoteip y mod_rewrite para las configuraciones que usan el proxy con mod_remoteip y determinadas reglas de mod_rewrite, un atacante podr\u00eda falsificar su direcci\u00f3n IP para el registro y los scripts PHP. Note que este problema se corrigi\u00f3 en Apache HTTP Server versi\u00f3n 2.4.24, pero se le asign\u00f3 retrospectivamente un CVE de poca gravedad en 2020\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:N/I:P/A:N\",\"baseScore\":4.3,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.6,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"security@apache.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-345\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-345\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.4.1\",\"versionEndIncluding\":\"2.4.23\",\"matchCriteriaId\":\"8805C987-A5BB-403B-BB9F-B745A2AE7865\"}]}]}],\"references\":[{\"url\":\"https://httpd.apache.org/security/vulnerabilities_24.html\",\"source\":\"security@apache.org\",\"tags\":[\"Vendor 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Party Advisory\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20200827-0002/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.oracle.com/security-alerts/cpujan2021.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T11:51:04+00:00",
      "cve": "CVE-2020-11985",
      "id": "CVE-2020-11985",
      "initial_release_date": "2020-08-07T00:00:00+00:00",
      "product_status:fixed": "138",
      "product_status:known_affected": "3",
      "product_status:known_not_affected": "22",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "httpd: IP address spoofing when proxying using mod_remoteip and mod_rewrite",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-11985.json",
      "version": "3"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.