CVE-2021-21702 (GCVE-0-2021-21702)
Vulnerability from cvelistv5 – Published: 2021-02-15 04:10 – Updated: 2024-09-16 17:34
VLAI
EPSS
VEX
Title
Null Dereference in SoapClient
Summary
In PHP versions 7.3.x below 7.3.27, 7.4.x below 7.4.15 and 8.0.x below 8.0.2, when using SOAP extension to connect to a SOAP server, a malicious SOAP server could return malformed XML data as a response that would cause PHP to access a null pointer and thus cause a crash.
Severity
5.3 (Medium)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://bugs.php.net/bug.php?id=80672 | x_refsource_MISC |
| https://www.debian.org/security/2021/dsa-4856 | vendor-advisoryx_refsource_DEBIAN |
| https://security.gentoo.org/glsa/202105-23 | vendor-advisoryx_refsource_GENTOO |
| https://lists.debian.org/debian-lts-announce/2021… | mailing-listx_refsource_MLIST |
| https://www.oracle.com/security-alerts/cpuoct2021.html | x_refsource_MISC |
| https://www.tenable.com/security/tns-2021-14 | x_refsource_CONFIRM |
| https://security.netapp.com/advisory/ntap-2021031… | x_refsource_CONFIRM |
Impacted products
Date Public
2021-02-01 00:00
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{
"lang": "en",
"value": "In PHP versions 7.3.x below 7.3.27, 7.4.x below 7.4.15 and 8.0.x below 8.0.2, when using SOAP extension to connect to a SOAP server, a malicious SOAP server could return malformed XML data as a response that would cause PHP to access a null pointer and thus cause a crash."
},
{
"lang": "es",
"value": "En PHP versiones 7.3.x por debajo de 7.3.27, 7.4.x por debajo de 7.4.15 y 8.0.x por debajo de 8.0.2, cuando se usa la extensi\u00f3n SOAP para conectarse a un servidor SOAP, un servidor SOAP malicioso podr\u00eda devolver datos XML malformados como respuesta eso har\u00eda que PHP acceda a un puntero null y, por tanto, causar\u00eda un bloqueo"
}
],
"id": "CVE-2021-21702",
"lastModified": "2024-11-21T05:48:51.847",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "security@php.net",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-02-15T04:15:12.673",
"references": [
{
"source": "security@php.net",
"tags": [
"Issue Tracking",
"Vendor Advisory"
],
"url": "https://bugs.php.net/bug.php?id=80672"
},
{
"source": "security@php.net",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00008.html"
},
{
"source": "security@php.net",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202105-23"
},
{
"source": "security@php.net",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20210312-0005/"
},
{
"source": "security@php.net",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4856"
},
{
"source": "security@php.net",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
},
{
"source": "security@php.net",
"tags": [
"Third Party Advisory"
],
"url": "https://www.tenable.com/security/tns-2021-14"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Issue Tracking",
"Vendor Advisory"
],
"url": "https://bugs.php.net/bug.php?id=80672"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00008.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/202105-23"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20210312-0005/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2021/dsa-4856"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://www.tenable.com/security/tns-2021-14"
}
],
"sourceIdentifier": "security@php.net",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "security@php.net",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-06-28T07:43:21+00:00",
"cve": "CVE-2021-21702",
"id": "CVE-2021-21702",
"initial_release_date": "2021-01-26T00:00:00+00:00",
"product_status:fixed": "514",
"product_status:known_affected": "150",
"product_status:known_not_affected": "26",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "php: NULL pointer dereference in SoapClient",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-21702.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-11T17:00:05Z",
"cve": "CVE-2021-21702",
"id": "CVE-2021-21702",
"initial_release_date": "2023-02-15T03:46:12Z",
"product_status:known_affected": "1272",
"product_status:known_not_affected": "673",
"product_status:recommended": "4437",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2021-21702",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-21702.json",
"version": "17"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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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.
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.
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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.
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