CVE-2017-12934 (GCVE-0-2017-12934)
Vulnerability from cvelistv5 – Published: 2017-08-18 03:00 – Updated: 2024-08-05 18:51
VLAI
EPSS
VEX
Summary
ext/standard/var_unserializer.re in PHP 7.0.x before 7.0.21 and 7.1.x before 7.1.7 is prone to a heap use after free while unserializing untrusted data, related to the zval_get_type function in Zend/zend_types.h. Exploitation of this issue can have an unspecified impact on the integrity of PHP.
Severity
7.5 (High)
CWE
- n/a
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://bugs.php.net/bug.php?id=74101 | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/100428 | vdb-entryx_refsource_BID |
| https://access.redhat.com/errata/RHSA-2018:1296 | vendor-advisoryx_refsource_REDHAT |
| https://www.debian.org/security/2018/dsa-4080 | vendor-advisoryx_refsource_DEBIAN |
| http://php.net/ChangeLog-7.php | x_refsource_CONFIRM |
Date Public
2017-08-17 00:00
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"criteria": "cpe:2.3:a:php:php:7.1.0:*:*:*:*:*:*:*",
"matchCriteriaId": "0C68AA43-ED90-4B98-A5F8-4E210C2CC7CD",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:php:php:7.1.1:*:*:*:*:*:*:*",
"matchCriteriaId": "2466D297-9442-40B0-A1A7-F9D166396CF8",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:php:php:7.1.2:*:*:*:*:*:*:*",
"matchCriteriaId": "EADBF7EE-18DC-49F9-BF2F-A09BBAE76F45",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:php:php:7.1.3:*:*:*:*:*:*:*",
"matchCriteriaId": "1726E9B6-A7FA-402B-A911-0CE81C623087",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:php:php:7.1.4:*:*:*:*:*:*:*",
"matchCriteriaId": "C3670FF7-2CA3-41A4-92FE-0123497E4E87",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:php:php:7.1.5:*:*:*:*:*:*:*",
"matchCriteriaId": "1C22CE03-DFE5-4CD3-B229-10B219A55434",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:php:php:7.1.6:*:*:*:*:*:*:*",
"matchCriteriaId": "C258AF27-84DF-4FC3-A651-1349BB567FB9",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "ext/standard/var_unserializer.re in PHP 7.0.x before 7.0.21 and 7.1.x before 7.1.7 is prone to a heap use after free while unserializing untrusted data, related to the zval_get_type function in Zend/zend_types.h. Exploitation of this issue can have an unspecified impact on the integrity of PHP."
},
{
"lang": "es",
"value": "ext/standard/var_unserializer.re en PHP en versiones 7.0.x anteriores a la 7.0.21 y versiones 7.1.x anteriores a la 7.1.7 es propenso a un uso de memoria din\u00e1mica antes de liberaci\u00f3n (heap use after free) al deserializar datos que no son de confianza. Esto est\u00e1 relacionado con la funci\u00f3n zval_get_type en Zend/zend_types.h. La explotaci\u00f3n de este problema puede tener un impacto sin especificar en la integridad de PHP."
}
],
"id": "CVE-2017-12934",
"lastModified": "2026-05-13T00:24:29.033",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV30": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.0"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2017-08-18T03:29:00.260",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Vendor Advisory"
],
"url": "http://php.net/ChangeLog-7.php"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/100428"
},
{
"source": "cve@mitre.org",
"url": "https://access.redhat.com/errata/RHSA-2018:1296"
},
{
"source": "cve@mitre.org",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://bugs.php.net/bug.php?id=74101"
},
{
"source": "cve@mitre.org",
"url": "https://www.debian.org/security/2018/dsa-4080"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "http://php.net/ChangeLog-7.php"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/100428"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2018:1296"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://bugs.php.net/bug.php?id=74101"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.debian.org/security/2018/dsa-4080"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-416"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-28T11:11:08+00:00",
"cve": "CVE-2017-12934",
"id": "CVE-2017-12934",
"initial_release_date": "2017-02-15T00:00:00+00:00",
"product_status:fixed": "254",
"product_status:known_not_affected": "86",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "php: heap use after free in ext/standard/var_unserializer.re",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2017/cve-2017-12934.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "low",
"current_release_date": "2026-05-13T15:59:22Z",
"cve": "CVE-2017-12934",
"id": "CVE-2017-12934",
"initial_release_date": "2023-02-15T04:41:16Z",
"product_status:recommended": "545",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2017-12934",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2017-12934.json",
"version": "11"
}
}
}
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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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