Vulnerability-Lookup

OESA-2021-1473 (CVE-2021-44224)

Vulnerability from osv_openeuler – Published: 2021-12-25 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

httpd security update

Details

Apache HTTP Server.

Security Fix(es):

A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).(CVE-2021-44224)

A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier.(CVE-2021-44790)

Severity

9.8 (Critical)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-44224	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-44790	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "httpd-devel-2.4.43-12.oe1.aarch64.rpm",
          "mod_md-2.4.43-12.oe1.aarch64.rpm",
          "httpd-debugsource-2.4.43-12.oe1.aarch64.rpm",
          "mod_ssl-2.4.43-12.oe1.aarch64.rpm",
          "mod_session-2.4.43-12.oe1.aarch64.rpm",
          "httpd-debuginfo-2.4.43-12.oe1.aarch64.rpm",
          "mod_proxy_html-2.4.43-12.oe1.aarch64.rpm",
          "mod_ldap-2.4.43-12.oe1.aarch64.rpm",
          "httpd-2.4.43-12.oe1.aarch64.rpm",
          "httpd-tools-2.4.43-12.oe1.aarch64.rpm"
        ],
        "noarch": [
          "httpd-filesystem-2.4.43-12.oe1.noarch.rpm",
          "httpd-help-2.4.43-12.oe1.noarch.rpm"
        ],
        "src": [
          "httpd-2.4.43-12.oe1.src.rpm"
        ],
        "x86_64": [
          "mod_session-2.4.43-12.oe1.x86_64.rpm",
          "httpd-debugsource-2.4.43-12.oe1.x86_64.rpm",
          "mod_ldap-2.4.43-12.oe1.x86_64.rpm",
          "httpd-debuginfo-2.4.43-12.oe1.x86_64.rpm",
          "httpd-2.4.43-12.oe1.x86_64.rpm",
          "httpd-tools-2.4.43-12.oe1.x86_64.rpm",
          "mod_md-2.4.43-12.oe1.x86_64.rpm",
          "mod_proxy_html-2.4.43-12.oe1.x86_64.rpm",
          "mod_ssl-2.4.43-12.oe1.x86_64.rpm",
          "httpd-devel-2.4.43-12.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "httpd",
        "purl": "pkg:rpm/openEuler/httpd\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.43-12.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
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          "mod_session-2.4.43-12.oe1.aarch64.rpm",
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          "httpd-debuginfo-2.4.43-12.oe1.aarch64.rpm",
          "mod_ssl-2.4.43-12.oe1.aarch64.rpm",
          "httpd-2.4.43-12.oe1.aarch64.rpm",
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        ],
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          "httpd-debuginfo-2.4.43-12.oe1.x86_64.rpm",
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        ]
      },
      "package": {
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        "name": "httpd",
        "purl": "pkg:rpm/openEuler/httpd\u0026distro=openEuler-20.03-LTS-SP2"
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          ],
          "type": "ECOSYSTEM"
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  ],
  "database_specific": {
    "severity": "Critical"
  },
  "details": " Apache HTTP Server.\r\n\r\nSecurity Fix(es):\r\n\r\nA crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).(CVE-2021-44224)\r\n\r\nA carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier.(CVE-2021-44790)",
  "id": "OESA-2021-1473",
  "modified": "2026-08-06T11:04:44Z",
  "published": "2021-12-25T11:04:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1473"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-44224"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-44790"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "httpd security update",
  "upstream": [
    "CVE-2021-44224",
    "CVE-2021-44790"
  ]
}

CVE-2021-44224 (GCVE-0-2021-44224)

Vulnerability from cvelistv5 – Published: 2021-12-20 11:20 – Updated: 2024-08-04 04:17

Title

Possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier

Summary

Severity

No CVSS data available.

CWE

CWE-476 - NULL Pointer Dereference

Assigner

apache mitre root

References

19 references

URL	Tags
http://httpd.apache.org/security/vulnerabilities_…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/12/20/3	mailing-listx_refsource_MLIST
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://www.debian.org/security/2022/dsa-5035	vendor-advisoryx_refsource_DEBIAN
https://www.oracle.com/security-alerts/cpujan2022.html	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021122…	x_refsource_CONFIRM
https://www.tenable.com/security/tns-2022-01	x_refsource_CONFIRM
https://www.tenable.com/security/tns-2022-03	x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://www.oracle.com/security-alerts/cpuapr2022.html	x_refsource_MISC
https://support.apple.com/kb/HT213257	x_refsource_CONFIRM
https://support.apple.com/kb/HT213256	x_refsource_CONFIRM
https://support.apple.com/kb/HT213255	x_refsource_CONFIRM
http://seclists.org/fulldisclosure/2022/May/33	mailing-listx_refsource_FULLDISC
http://seclists.org/fulldisclosure/2022/May/35	mailing-listx_refsource_FULLDISC
http://seclists.org/fulldisclosure/2022/May/38	mailing-listx_refsource_FULLDISC
https://security.gentoo.org/glsa/202208-20	vendor-advisoryx_refsource_GENTOO

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache HTTP Server	Affected: 2.4.7 , < Apache HTTP Server 2.4* (custom)

Credits

漂亮鼠 TengMA(@Te3t123)

Show details on NVD website

JSON

To clipboard

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CVE-2021-44790 (GCVE-0-2021-44790)

Vulnerability from cvelistv5 – Published: 2021-12-20 00:00 – Updated: 2024-08-04 04:32

Title

Possible buffer overflow when parsing multipart content in mod_lua of Apache HTTP Server 2.4.51 and earlier

Summary

Severity

No CVSS data available.

CWE

CWE-787 - Out-of-bounds Write

Assigner

apache mitre root

References

20 references

URL	Tags
http://httpd.apache.org/security/vulnerabilities_…
http://www.openwall.com/lists/oss-security/2021/12/20/4	mailing-list
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://www.debian.org/security/2022/dsa-5035	vendor-advisory
https://www.oracle.com/security-alerts/cpujan2022.html
https://security.netapp.com/advisory/ntap-2021122…
https://www.tenable.com/security/tns-2022-01
https://www.tenable.com/security/tns-2022-03
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://www.oracle.com/security-alerts/cpuapr2022.html
https://support.apple.com/kb/HT213257
https://support.apple.com/kb/HT213256
https://support.apple.com/kb/HT213255
http://seclists.org/fulldisclosure/2022/May/33	mailing-list
http://seclists.org/fulldisclosure/2022/May/35	mailing-list
http://seclists.org/fulldisclosure/2022/May/38	mailing-list
https://security.gentoo.org/glsa/202208-20	vendor-advisory
http://packetstormsecurity.com/files/171631/Apach…

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache HTTP Server	Affected: Apache HTTP Server 2.4 , ≤ 2.4.51 (custom)

Credits

Chamal Anonymous working with Trend Micro Zero Day Initiative

Show details on NVD website

JSON

To clipboard

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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.

Detection rules are retrieved from Rulezet.

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.

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.

Action not permitted

OESA-2021-1473 (CVE-2021-44224)

CVE-2021-44224 (GCVE-0-2021-44224)

CVE-2021-44790 (GCVE-0-2021-44790)

Tags

Sightings

Nomenclature

Related by attack behaviour