CVE-2013-6420 (GCVE-0-2013-6420)
Vulnerability from cvelistv5 – Published: 2013-12-17 02:00 – Updated: 2024-08-06 17:39
VLAI
EPSS
VEX
Summary
The asn1_time_to_time_t function in ext/openssl/openssl.c in PHP before 5.3.28, 5.4.x before 5.4.23, and 5.5.x before 5.5.7 does not properly parse (1) notBefore and (2) notAfter timestamps in X.509 certificates, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted certificate that is not properly handled by the openssl_x509_parse function.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
19 references
Date Public
2013-12-10 00:00
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The asn1_time_to_time_t function in ext/openssl/openssl.c in PHP before 5.3.28, 5.4.x before 5.4.23, and 5.5.x before 5.5.7 does not properly parse (1) notBefore and (2) notAfter timestamps in X.509 certificates, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted certificate that is not properly handled by the openssl_x509_parse function."
},
{
"lang": "es",
"value": "La funci\u00f3n asn1_time_to_time_t en ext / openssl / openssl.c en PHP anterior a 5.3.28, 5.4.x aterior a 5.4.23 y 5.5.x anterior de 5.5.7 no trata correctamente las marcas de tiempo (timestamps) (1) notBefore y (2) notAfter en certificados X 0.509 , lo que permite a atacantes remotos ejecutar c\u00f3digo arbitrario o causar una denegaci\u00f3n de servicio (corrupci\u00f3n de memoria) a trav\u00e9s de un certificado manipulado que no est\u00e1 tratado adecuadamente por la funci\u00f3n openssl_x509_parse."
}
],
"id": "CVE-2013-6420",
"lastModified": "2026-04-29T01:13:23.040",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 7.5,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2013-12-17T04:46:45.877",
"references": [
{
"source": "secalert@redhat.com",
"url": "http://forums.interworx.com/threads/8000-InterWorx-Version-5-0-14-Released-on-Beta-Channel%21"
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},
{
"source": "secalert@redhat.com",
"url": "http://www.securityfocus.com/bid/64225"
},
{
"source": "secalert@redhat.com",
"url": "http://www.securitytracker.com/id/1029472"
},
{
"source": "secalert@redhat.com",
"url": "http://www.ubuntu.com/usn/USN-2055-1"
},
{
"source": "secalert@redhat.com",
"tags": [
"Patch"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1036830"
},
{
"source": "secalert@redhat.com",
"url": "https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322"
},
{
"source": "secalert@redhat.com",
"tags": [
"Exploit"
],
"url": "https://www.sektioneins.de/advisories/advisory-012013-php-openssl_x509_parse-memory-corruption-vulnerability.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://forums.interworx.com/threads/8000-InterWorx-Version-5-0-14-Released-on-Beta-Channel%21"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=c1224573c773b6845e83505f717fbf820fc18415"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.opensuse.org/opensuse-updates/2013-12/msg00125.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.opensuse.org/opensuse-updates/2013-12/msg00126.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://rhn.redhat.com/errata/RHSA-2013-1813.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://rhn.redhat.com/errata/RHSA-2013-1815.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://rhn.redhat.com/errata/RHSA-2013-1824.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://rhn.redhat.com/errata/RHSA-2013-1825.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://rhn.redhat.com/errata/RHSA-2013-1826.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/59652"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://support.apple.com/kb/HT6150"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.debian.org/security/2013/dsa-2816"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.php.net/ChangeLog-5.php"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/bid/64225"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securitytracker.com/id/1029472"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.ubuntu.com/usn/USN-2055-1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1036830"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit"
],
"url": "https://www.sektioneins.de/advisories/advisory-012013-php-openssl_x509_parse-memory-corruption-vulnerability.html"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-119"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Critical",
"current_release_date": "2026-06-28T06:38:15+00:00",
"cve": "CVE-2013-6420",
"id": "CVE-2013-6420",
"initial_release_date": "2013-12-10T00:00:00+00:00",
"product_status:fixed": "1635",
"product_status:known_affected": "30",
"product_status:known_not_affected": "26",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "php: memory corruption in openssl_x509_parse()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2013/cve-2013-6420.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-06T00:00:54Z",
"cve": "CVE-2013-6420",
"id": "CVE-2013-6420",
"initial_release_date": "2023-02-15T05:34:12Z",
"product_status:known_affected": "1296",
"product_status:known_not_affected": "2206",
"product_status:recommended": "1028",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2013-6420",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2013-6420.json",
"version": "16"
}
}
}
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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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