Vulnerability-Lookup

OESA-2021-1455 (CVE-2021-21707)

Vulnerability from osv_openeuler – Published: 2021-12-10 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

php security update

Details

PHP is an HTML-embedded scripting language. PHP attempts to make it easy for developers to write dynamically generated web pages. PHP also offers built-in database integration for several commercial and non-commercial database management systems, so writing a database-enabled webpage with PHP is fairly simple. The most common use of PHP coding is probably as a replacement for CGI scripts. The php package contains the module (often referred to as mod_php) which adds support for the PHP language to Apache HTTP Server.

Security Fix(es):

In PHP versions 7.3.x below 7.3.33, 7.4.x below 7.4.26 and 8.0.x below 8.0.13, certain XML parsing functions, like simplexml_load_file(), URL-decode the filename passed to them. If that filename contains URL-encoded NUL character, this may cause the function to interpret this as the end of the filename, thus interpreting the filename differently from what the user intended, which may lead it to reading a different file than intended.(CVE-2021-21707)

Severity

5.3 (Medium)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-21707	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "php-enchant-7.2.10-17.oe1.aarch64.rpm",
          "php-xmlrpc-7.2.10-17.oe1.aarch64.rpm",
          "php-common-7.2.10-17.oe1.aarch64.rpm",
          "php-embedded-7.2.10-17.oe1.aarch64.rpm",
          "php-7.2.10-17.oe1.aarch64.rpm",
          "php-xml-7.2.10-17.oe1.aarch64.rpm",
          "php-recode-7.2.10-17.oe1.aarch64.rpm",
          "php-soap-7.2.10-17.oe1.aarch64.rpm",
          "php-json-7.2.10-17.oe1.aarch64.rpm",
          "php-ldap-7.2.10-17.oe1.aarch64.rpm",
          "php-odbc-7.2.10-17.oe1.aarch64.rpm",
          "php-pgsql-7.2.10-17.oe1.aarch64.rpm",
          "php-dba-7.2.10-17.oe1.aarch64.rpm",
          "php-bcmath-7.2.10-17.oe1.aarch64.rpm",
          "php-pdo-7.2.10-17.oe1.aarch64.rpm",
          "php-debugsource-7.2.10-17.oe1.aarch64.rpm",
          "php-devel-7.2.10-17.oe1.aarch64.rpm",
          "php-snmp-7.2.10-17.oe1.aarch64.rpm",
          "php-debuginfo-7.2.10-17.oe1.aarch64.rpm",
          "php-opcache-7.2.10-17.oe1.aarch64.rpm",
          "php-mysqlnd-7.2.10-17.oe1.aarch64.rpm",
          "php-gmp-7.2.10-17.oe1.aarch64.rpm",
          "php-tidy-7.2.10-17.oe1.aarch64.rpm",
          "php-help-7.2.10-17.oe1.aarch64.rpm",
          "php-mbstring-7.2.10-17.oe1.aarch64.rpm",
          "php-process-7.2.10-17.oe1.aarch64.rpm",
          "php-gd-7.2.10-17.oe1.aarch64.rpm",
          "php-dbg-7.2.10-17.oe1.aarch64.rpm",
          "php-fpm-7.2.10-17.oe1.aarch64.rpm",
          "php-cli-7.2.10-17.oe1.aarch64.rpm",
          "php-intl-7.2.10-17.oe1.aarch64.rpm"
        ],
        "src": [
          "php-7.2.10-17.oe1.src.rpm"
        ],
        "x86_64": [
          "php-common-7.2.10-17.oe1.x86_64.rpm",
          "php-debugsource-7.2.10-17.oe1.x86_64.rpm",
          "php-pgsql-7.2.10-17.oe1.x86_64.rpm",
          "php-tidy-7.2.10-17.oe1.x86_64.rpm",
          "php-xml-7.2.10-17.oe1.x86_64.rpm",
          "php-odbc-7.2.10-17.oe1.x86_64.rpm",
          "php-xmlrpc-7.2.10-17.oe1.x86_64.rpm",
          "php-process-7.2.10-17.oe1.x86_64.rpm",
          "php-cli-7.2.10-17.oe1.x86_64.rpm",
          "php-recode-7.2.10-17.oe1.x86_64.rpm",
          "php-intl-7.2.10-17.oe1.x86_64.rpm",
          "php-gmp-7.2.10-17.oe1.x86_64.rpm",
          "php-opcache-7.2.10-17.oe1.x86_64.rpm",
          "php-enchant-7.2.10-17.oe1.x86_64.rpm",
          "php-gd-7.2.10-17.oe1.x86_64.rpm",
          "php-ldap-7.2.10-17.oe1.x86_64.rpm",
          "php-json-7.2.10-17.oe1.x86_64.rpm",
          "php-dbg-7.2.10-17.oe1.x86_64.rpm",
          "php-debuginfo-7.2.10-17.oe1.x86_64.rpm",
          "php-snmp-7.2.10-17.oe1.x86_64.rpm",
          "php-mbstring-7.2.10-17.oe1.x86_64.rpm",
          "php-embedded-7.2.10-17.oe1.x86_64.rpm",
          "php-help-7.2.10-17.oe1.x86_64.rpm",
          "php-devel-7.2.10-17.oe1.x86_64.rpm",
          "php-pdo-7.2.10-17.oe1.x86_64.rpm",
          "php-fpm-7.2.10-17.oe1.x86_64.rpm",
          "php-bcmath-7.2.10-17.oe1.x86_64.rpm",
          "php-soap-7.2.10-17.oe1.x86_64.rpm",
          "php-mysqlnd-7.2.10-17.oe1.x86_64.rpm",
          "php-7.2.10-17.oe1.x86_64.rpm",
          "php-dba-7.2.10-17.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "php",
        "purl": "pkg:rpm/openEuler/php\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.10-17.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "php-bcmath-8.0.0-6.oe1.aarch64.rpm",
          "php-embedded-8.0.0-6.oe1.aarch64.rpm",
          "php-tidy-8.0.0-6.oe1.aarch64.rpm",
          "php-xml-8.0.0-6.oe1.aarch64.rpm",
          "php-debugsource-8.0.0-6.oe1.aarch64.rpm",
          "php-8.0.0-6.oe1.aarch64.rpm",
          "php-enchant-8.0.0-6.oe1.aarch64.rpm",
          "php-fpm-8.0.0-6.oe1.aarch64.rpm",
          "php-pdo-8.0.0-6.oe1.aarch64.rpm",
          "php-mbstring-8.0.0-6.oe1.aarch64.rpm",
          "php-common-8.0.0-6.oe1.aarch64.rpm",
          "php-help-8.0.0-6.oe1.aarch64.rpm",
          "php-mysqlnd-8.0.0-6.oe1.aarch64.rpm",
          "php-opcache-8.0.0-6.oe1.aarch64.rpm",
          "php-snmp-8.0.0-6.oe1.aarch64.rpm",
          "php-pgsql-8.0.0-6.oe1.aarch64.rpm",
          "php-debuginfo-8.0.0-6.oe1.aarch64.rpm",
          "php-intl-8.0.0-6.oe1.aarch64.rpm",
          "php-odbc-8.0.0-6.oe1.aarch64.rpm",
          "php-gd-8.0.0-6.oe1.aarch64.rpm",
          "php-dba-8.0.0-6.oe1.aarch64.rpm",
          "php-cli-8.0.0-6.oe1.aarch64.rpm",
          "php-devel-8.0.0-6.oe1.aarch64.rpm",
          "php-dbg-8.0.0-6.oe1.aarch64.rpm",
          "php-process-8.0.0-6.oe1.aarch64.rpm",
          "php-gmp-8.0.0-6.oe1.aarch64.rpm",
          "php-ldap-8.0.0-6.oe1.aarch64.rpm",
          "php-soap-8.0.0-6.oe1.aarch64.rpm",
          "php-ffi-8.0.0-6.oe1.aarch64.rpm"
        ],
        "src": [
          "php-8.0.0-6.oe1.src.rpm"
        ],
        "x86_64": [
          "php-cli-8.0.0-6.oe1.x86_64.rpm",
          "php-mysqlnd-8.0.0-6.oe1.x86_64.rpm",
          "php-dba-8.0.0-6.oe1.x86_64.rpm",
          "php-mbstring-8.0.0-6.oe1.x86_64.rpm",
          "php-embedded-8.0.0-6.oe1.x86_64.rpm",
          "php-enchant-8.0.0-6.oe1.x86_64.rpm",
          "php-tidy-8.0.0-6.oe1.x86_64.rpm",
          "php-pdo-8.0.0-6.oe1.x86_64.rpm",
          "php-bcmath-8.0.0-6.oe1.x86_64.rpm",
          "php-dbg-8.0.0-6.oe1.x86_64.rpm",
          "php-odbc-8.0.0-6.oe1.x86_64.rpm",
          "php-opcache-8.0.0-6.oe1.x86_64.rpm",
          "php-gd-8.0.0-6.oe1.x86_64.rpm",
          "php-gmp-8.0.0-6.oe1.x86_64.rpm",
          "php-soap-8.0.0-6.oe1.x86_64.rpm",
          "php-common-8.0.0-6.oe1.x86_64.rpm",
          "php-process-8.0.0-6.oe1.x86_64.rpm",
          "php-help-8.0.0-6.oe1.x86_64.rpm",
          "php-fpm-8.0.0-6.oe1.x86_64.rpm",
          "php-ldap-8.0.0-6.oe1.x86_64.rpm",
          "php-debuginfo-8.0.0-6.oe1.x86_64.rpm",
          "php-snmp-8.0.0-6.oe1.x86_64.rpm",
          "php-8.0.0-6.oe1.x86_64.rpm",
          "php-debugsource-8.0.0-6.oe1.x86_64.rpm",
          "php-intl-8.0.0-6.oe1.x86_64.rpm",
          "php-xml-8.0.0-6.oe1.x86_64.rpm",
          "php-pgsql-8.0.0-6.oe1.x86_64.rpm",
          "php-ffi-8.0.0-6.oe1.x86_64.rpm",
          "php-devel-8.0.0-6.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP2",
        "name": "php",
        "purl": "pkg:rpm/openEuler/php\u0026distro=openEuler-20.03-LTS-SP2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.0.0-6.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "PHP is an HTML-embedded scripting language. PHP attempts to make it easy for developers to write dynamically generated web pages. PHP also offers built-in database integration for several commercial and non-commercial database management systems, so writing a database-enabled webpage with PHP is fairly simple. The most common use of PHP coding is probably as a replacement for CGI scripts. The php package contains the module (often referred to as mod_php) which adds support for the PHP language to Apache HTTP Server.\r\n\r\nSecurity Fix(es):\r\n\r\nIn PHP versions 7.3.x below 7.3.33, 7.4.x below 7.4.26 and 8.0.x below 8.0.13, certain XML parsing functions, like simplexml_load_file(), URL-decode the filename passed to them. If that filename contains URL-encoded NUL character, this may cause the function to interpret this as the end of the filename, thus interpreting the filename differently from what the user intended, which may lead it to reading a different file than intended.(CVE-2021-21707)",
  "id": "OESA-2021-1455",
  "modified": "2026-08-06T11:04:43Z",
  "published": "2021-12-10T11:04:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1455"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21707"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "php security update",
  "upstream": [
    "CVE-2021-21707"
  ]
}

CVE-2021-21707 (GCVE-0-2021-21707)

Vulnerability from cvelistv5 – Published: 2021-11-29 06:25 – Updated: 2024-09-17 03:38

Title

Special characters break path parsing in XML functions

Summary

Severity

5.3 (Medium)


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

CWE

CWE-159 - Failure to Sanitize Special Element

Assigner

php mitre root

References

5 references

URL	Tags
https://bugs.php.net/bug.php?id=79971
https://security.netapp.com/advisory/ntap-2021122…
https://www.debian.org/security/2022/dsa-5082	vendor-advisory
https://www.tenable.com/security/tns-2022-09
https://lists.debian.org/debian-lts-announce/2022…	mailing-list

Impacted products

1 product

Vendor	Product	Version
PHP Group	PHP	Affected: 7.3.x , < 7.3.33 (custom) Affected: 7.4.x , < 7.4.26 (custom) Affected: 8.0.X , < 8.0.13 (custom)

Date Public

2021-11-15 00:00

Credits

Reported by rawataman6525 at gmail dot com

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:23:28.471Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://bugs.php.net/bug.php?id=79971"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20211223-0005/"
          },
          {
            "name": "DSA-5082",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5082"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.tenable.com/security/tns-2022-09"
          },
          {
            "name": "[debian-lts-announce] 20221215 [SECURITY] [DLA 3243-1] php7.3 security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/12/msg00030.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "PHP",
          "vendor": "PHP Group",
          "versions": [
            {
              "lessThan": "7.3.33",
              "status": "affected",
              "version": "7.3.x",
              "versionType": "custom"
            },
            {
              "lessThan": "7.4.26",
              "status": "affected",
              "version": "7.4.x",
              "versionType": "custom"
            },
            {
              "lessThan": "8.0.13",
              "status": "affected",
              "version": "8.0.X",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Reported by rawataman6525 at gmail dot com"
        }
      ],
      "datePublic": "2021-11-15T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "In PHP versions 7.3.x below 7.3.33, 7.4.x below 7.4.26 and 8.0.x below 8.0.13, certain XML parsing functions, like simplexml_load_file(), URL-decode the filename passed to them. If that filename contains URL-encoded NUL character, this may cause the function to interpret this as the end of the filename, thus interpreting the filename differently from what the user intended, which may lead it to reading a different file than intended."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-159",
              "description": "CWE-159 Failure to Sanitize Special Element",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-12-15T00:00:00.000Z",
        "orgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
        "shortName": "php"
      },
      "references": [
        {
          "url": "https://bugs.php.net/bug.php?id=79971"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20211223-0005/"
        },
        {
          "name": "DSA-5082",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.debian.org/security/2022/dsa-5082"
        },
        {
          "url": "https://www.tenable.com/security/tns-2022-09"
        },
        {
          "name": "[debian-lts-announce] 20221215 [SECURITY] [DLA 3243-1] php7.3 security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/12/msg00030.html"
        }
      ],
      "source": {
        "advisory": "https://bugs.php.net/bug.php?id=79971",
        "defect": [
          "https://bugs.php.net/bug.php?id=79971"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Special characters break path parsing in XML functions",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
    "assignerShortName": "php",
    "cveId": "CVE-2021-21707",
    "datePublished": "2021-11-29T06:25:08.814Z",
    "dateReserved": "2021-01-04T00:00:00.000Z",
    "dateUpdated": "2024-09-17T03:38:22.394Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

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-2021-1455 (CVE-2021-21707)

CVE-2021-21707 (GCVE-0-2021-21707)

Tags

Sightings

Nomenclature

Related by attack behaviour