fkie_cve-2021-21703
Vulnerability from fkie_nvd
Published
2021-10-25 06:15
Modified
2024-11-21 05:48
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In PHP versions 7.3.x up to and including 7.3.31, 7.4.x below 7.4.25 and 8.0.x below 8.0.12, when running PHP FPM SAPI with main FPM daemon process running as root and child worker processes running as lower-privileged users, it is possible for the child processes to access memory shared with the main process and write to it, modifying it in a way that would cause the root process to conduct invalid memory reads and writes, which can be used to escalate privileges from local unprivileged user to the root user.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| php | php | * | |
| php | php | * | |
| php | php | * | |
| debian | debian_linux | 9.0 | |
| debian | debian_linux | 10.0 | |
| debian | debian_linux | 11.0 | |
| fedoraproject | fedora | 33 | |
| fedoraproject | fedora | 34 | |
| fedoraproject | fedora | 35 | |
| netapp | clustered_data_ontap | - | |
| oracle | communications_diameter_signaling_router | * |
{ configurations: [ { nodes: [ { cpeMatch: [ { criteria: "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*", matchCriteriaId: "7FFE0A10-A39D-4BFA-A081-AA87CDCB56BB", versionEndIncluding: "7.3.31", versionStartIncluding: "7.3.0", vulnerable: true, }, { criteria: "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*", matchCriteriaId: "E775E547-4990-4809-BE21-7E9B99059F1C", versionEndExcluding: "7.4.25", versionStartIncluding: "7.4.0", vulnerable: true, }, { criteria: "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*", matchCriteriaId: "5633A8ED-60EF-4F14-A120-82A36BBD55A8", versionEndExcluding: "8.0.12", versionStartIncluding: "8.0.0", vulnerable: true, }, ], negate: false, operator: "OR", }, ], }, { nodes: [ { cpeMatch: [ { criteria: "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", matchCriteriaId: "DEECE5FC-CACF-4496-A3E7-164736409252", vulnerable: true, }, { criteria: "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", matchCriteriaId: "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73", vulnerable: true, }, { criteria: "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", matchCriteriaId: "FA6FEEC2-9F11-4643-8827-749718254FED", vulnerable: true, }, ], negate: false, operator: "OR", }, ], }, { nodes: [ { cpeMatch: [ { criteria: "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", matchCriteriaId: "E460AA51-FCDA-46B9-AE97-E6676AA5E194", vulnerable: true, }, { criteria: "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", matchCriteriaId: "A930E247-0B43-43CB-98FF-6CE7B8189835", vulnerable: true, }, { criteria: "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*", matchCriteriaId: "80E516C0-98A4-4ADE-B69F-66A772E2BAAA", vulnerable: true, }, ], negate: false, operator: "OR", }, ], }, { nodes: [ { cpeMatch: [ { criteria: "cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*", matchCriteriaId: "1FE996B1-6951-4F85-AA58-B99A379D2163", vulnerable: true, }, ], negate: false, operator: "OR", }, ], }, { nodes: [ { cpeMatch: [ { criteria: "cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:*", matchCriteriaId: "590ADE5F-0D0F-4576-8BA6-828758823442", versionEndIncluding: "8.5.0.2", versionStartIncluding: "8.0.0.0", vulnerable: true, }, ], negate: false, operator: "OR", }, ], }, ], cveTags: [], descriptions: [ { lang: "en", value: "In PHP versions 7.3.x up to and including 7.3.31, 7.4.x below 7.4.25 and 8.0.x below 8.0.12, when running PHP FPM SAPI with main FPM daemon process running as root and child worker processes running as lower-privileged users, it is possible for the child processes to access memory shared with the main process and write to it, modifying it in a way that would cause the root process to conduct invalid memory reads and writes, which can be used to escalate privileges from local unprivileged user to the root user.", }, { lang: "es", value: "En PHP versiones 7.3.x hasta 7.3.31 incluyéndola, versiones 7.4.x y por debajo de 7.4.25 y versiones 8.0.x por debajo de 8.0. 12, cuando es ejecutado PHP FPM SAPI con el proceso demonio FPM principal ejecutado como root y los procesos worker hijos ejecutados como usuarios menos privilegiados, es posible que los procesos hijos accedan a la memoria compartida con el proceso principal y escriban en ella, modificándola de forma que causaría que el proceso root realizara lecturas y escrituras de memoria no válidas, que puede ser usado para escalar los privilegios del usuario local sin privilegios al usuario root", }, ], id: "CVE-2021-21703", lastModified: "2024-11-21T05:48:52.000", metrics: { cvssMetricV2: [ { acInsufInfo: false, baseSeverity: "MEDIUM", cvssData: { accessComplexity: "MEDIUM", accessVector: "LOCAL", authentication: "NONE", availabilityImpact: "COMPLETE", baseScore: 6.9, confidentialityImpact: "COMPLETE", integrityImpact: "COMPLETE", vectorString: "AV:L/AC:M/Au:N/C:C/I:C/A:C", version: "2.0", }, exploitabilityScore: 3.4, impactScore: 10, obtainAllPrivilege: false, obtainOtherPrivilege: false, obtainUserPrivilege: false, source: "nvd@nist.gov", type: "Primary", userInteractionRequired: false, }, ], cvssMetricV31: [ { cvssData: { attackComplexity: "HIGH", attackVector: "LOCAL", availabilityImpact: "HIGH", baseScore: 7.8, baseSeverity: "HIGH", confidentialityImpact: "HIGH", integrityImpact: "HIGH", privilegesRequired: "LOW", scope: "CHANGED", userInteraction: "NONE", vectorString: "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", version: "3.1", }, exploitabilityScore: 1.1, impactScore: 6, source: "security@php.net", type: "Secondary", }, { cvssData: { attackComplexity: "HIGH", attackVector: "LOCAL", availabilityImpact: "HIGH", baseScore: 7, baseSeverity: "HIGH", confidentialityImpact: "HIGH", integrityImpact: "HIGH", privilegesRequired: "LOW", scope: "UNCHANGED", userInteraction: "NONE", vectorString: "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", version: "3.1", }, exploitabilityScore: 1, impactScore: 5.9, source: "nvd@nist.gov", type: "Primary", }, ], }, published: "2021-10-25T06:15:06.563", references: [ { source: "security@php.net", tags: [ "Mailing List", "Patch", "Third Party Advisory", ], url: "http://www.openwall.com/lists/oss-security/2021/10/26/7", }, { source: "security@php.net", tags: [ "Exploit", "Issue Tracking", "Patch", "Vendor Advisory", ], url: "https://bugs.php.net/bug.php?id=81026", }, { source: "security@php.net", tags: [ "Mailing List", "Third Party Advisory", ], url: "https://lists.debian.org/debian-lts-announce/2021/10/msg00021.html", }, { source: "security@php.net", url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6PZVLICZUJMXOGWOUWSBAEGIVTF6Y6V3/", }, { source: "security@php.net", url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JO5RA6YOBGGGKLIA6F6BQRZDDECF5L3R/", }, { source: "security@php.net", url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PBM3KKB3RY2YPOKNMC4HIH7IH3T3WC74/", }, { source: "security@php.net", tags: [ "Third Party Advisory", ], url: "https://security.gentoo.org/glsa/202209-20", }, { source: "security@php.net", tags: [ "Third Party Advisory", ], url: "https://security.netapp.com/advisory/ntap-20211118-0003/", }, { source: "security@php.net", tags: [ "Third Party Advisory", ], url: "https://www.debian.org/security/2021/dsa-4992", }, { source: "security@php.net", tags: [ "Third Party Advisory", ], url: "https://www.debian.org/security/2021/dsa-4993", }, { source: "security@php.net", tags: [ "Patch", "Vendor Advisory", ], url: "https://www.oracle.com/security-alerts/cpuapr2022.html", }, { source: "security@php.net", tags: [ "Patch", "Vendor Advisory", ], url: "https://www.oracle.com/security-alerts/cpujan2022.html", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Mailing List", "Patch", "Third Party Advisory", ], url: "http://www.openwall.com/lists/oss-security/2021/10/26/7", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Exploit", "Issue Tracking", "Patch", "Vendor Advisory", ], url: "https://bugs.php.net/bug.php?id=81026", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Mailing List", "Third Party Advisory", ], url: "https://lists.debian.org/debian-lts-announce/2021/10/msg00021.html", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6PZVLICZUJMXOGWOUWSBAEGIVTF6Y6V3/", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JO5RA6YOBGGGKLIA6F6BQRZDDECF5L3R/", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PBM3KKB3RY2YPOKNMC4HIH7IH3T3WC74/", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Third Party Advisory", ], url: "https://security.gentoo.org/glsa/202209-20", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Third Party Advisory", ], url: "https://security.netapp.com/advisory/ntap-20211118-0003/", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Third Party Advisory", ], url: "https://www.debian.org/security/2021/dsa-4992", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Third Party Advisory", ], url: "https://www.debian.org/security/2021/dsa-4993", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Patch", "Vendor Advisory", ], url: "https://www.oracle.com/security-alerts/cpuapr2022.html", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Patch", "Vendor Advisory", ], url: "https://www.oracle.com/security-alerts/cpujan2022.html", }, ], sourceIdentifier: "security@php.net", vulnStatus: "Modified", weaknesses: [ { description: [ { lang: "en", value: "CWE-284", }, { lang: "en", value: "CWE-787", }, ], source: "security@php.net", type: "Secondary", }, { description: [ { lang: "en", value: "CWE-787", }, ], source: "nvd@nist.gov", type: "Primary", }, ], }
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.