CVE-2020-9490 (GCVE-0-2020-9490)

Vulnerability from cvelistv5 – Published: 2020-08-07 15:24 – Updated: 2024-08-04 10:26
VLAI
Summary
Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via "H2Push off" will mitigate this vulnerability for unpatched servers.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • Push Diary Crash on Specifically Crafted HTTP/2 Header
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1097 records in the last 180 days details
References
URL Tags
https://httpd.apache.org/security/vulnerabilities… x_refsource_MISC
https://security.gentoo.org/glsa/202008-04 vendor-advisoryx_refsource_GENTOO
https://lists.apache.org/thread.html/r9e9f1a76097… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r5debe8f8272… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r623de9b2b24… mailing-listx_refsource_MLIST
https://usn.ubuntu.com/4458-1/ vendor-advisoryx_refsource_UBUNTU
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://www.debian.org/security/2020/dsa-4757 vendor-advisoryx_refsource_DEBIAN
https://www.oracle.com/security-alerts/cpuoct2020.html x_refsource_MISC
https://security.netapp.com/advisory/ntap-2020081… x_refsource_CONFIRM
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://www.oracle.com/security-alerts/cpujan2021.html x_refsource_MISC
http://packetstormsecurity.com/files/160392/Apach… x_refsource_MISC
https://lists.apache.org/thread.html/rf6449464fd8… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r06f0d87ebb6… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r09bb998baee… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rc998b18880d… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rdf3e5d0a5f5… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r97d0faab6ed… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r9f93cf6dde3… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/ra4da8760374… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r3c5c3104813… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r9e485ce5a01… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r0b6541c5fb2… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/rfed9fea918e… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r76142b8c511… mailing-listx_refsource_MLIST
Impacted products
Vendor Product Version CPE status
n/a Apache HTTP Server Affected: 2.4.20 to 2.4.43
Show details on NVD website
To clipboard 

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    "cna": {
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      "descriptions": [
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          "value": "Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the \u0027Cache-Digest\u0027 header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched servers."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "description": "Push Diary Crash on Specifically Crafted HTTP/2 Header",
              "lang": "en",
              "type": "text"
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          "value": "Apache HTTP Server versiones 2.4.20 hasta 2.4.43.. Un valor especialmente dise\u00f1ado para el encabezado \"Cache-Digest\" en una petici\u00f3n HTTP/2 resultar\u00eda en un bloqueo cuando el servidor realmente intenta un PUSH HTTP/2 un recurso mas tarde. Una configuraci\u00f3n de la funcionalidad HTTP/2 por medio de \"H2Push off\" mitigar\u00e1 esta vulnerabilidad para los servidores no parcheados"
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        "sourceIdentifier": "security@apache.org",
        "vulnStatus": "Modified",
        "weaknesses": [
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            "description": [
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                "lang": "en",
                "value": "CWE-444"
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            "source": "nvd@nist.gov",
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    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-04T06:16:22+00:00",
      "cve": "CVE-2020-9490",
      "id": "CVE-2020-9490",
      "initial_release_date": "2020-08-07T00:00:00+00:00",
      "product_status:fixed": "341",
      "product_status:known_affected": "3",
      "product_status:known_not_affected": "17",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "httpd: Push diary crash on specifically crafted HTTP/2 header",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-9490.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-13T00:06:35Z",
      "cve": "CVE-2020-9490",
      "id": "CVE-2020-9490",
      "initial_release_date": "2023-02-15T04:00:52Z",
      "product_status:known_affected": "473",
      "product_status:known_not_affected": "3",
      "product_status:recommended": "436",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2020-9490",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-9490.json",
      "version": "31"
    }
  }
}



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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

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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.
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Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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