Action not permitted
Modal body text goes here.
Modal Title
Modal Body
EUVD-2026-184698
European Vulnerability Database identifier assigned by ENISAReserved
2026-10-02 06:41
Assigner
ENISA
Alias of
a CVE record, shown under related vulnerabilities.
This identifier carries no description, severity or references of its own:
they belong to that CVE.
{
"assigner": "ENISA",
"date_reserved": "2026-10-02T06:41:48.233309+00:00",
"id": "EUVD-2026-184698"
}
CVE-2017-3737 (GCVE-0-2017-3737)
Vulnerability from cvelistv5 – Published: 2017-12-07 16:00 – Updated: 2024-09-17 03:53
VLAI
EPSS
VEX
Summary
OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an "error state" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. In order to exploit this issue an application bug would have to be present that resulted in a call to SSL_read()/SSL_write() being issued after having already received a fatal error. OpenSSL version 1.0.2b-1.0.2m are affected. Fixed in OpenSSL 1.0.2n. OpenSSL 1.1.0 is not affected.
Severity
No CVSS data available.
CWE
- Unauthenticated read/unencrypted write
Assigner
References
21 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| OpenSSL Software Foundation | OpenSSL |
Affected:
1.0.2b-1.0.2m
|
Date Public
2017-12-07 00:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-05T14:39:40.599Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "RHSA-2018:2185",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2018:2185"
},
{
"name": "RHSA-2018:2186",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2018:2186"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://github.com/openssl/openssl/commit/898fb884b706aaeb283de4812340bb0bde8476dc"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20180419-0002/"
},
{
"name": "FreeBSD-SA-17:12",
"tags": [
"vendor-advisory",
"x_refsource_FREEBSD",
"x_transferred"
],
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-17:12.openssl.asc"
},
{
"name": "GLSA-201712-03",
"tags": [
"vendor-advisory",
"x_refsource_GENTOO",
"x_transferred"
],
"url": "https://security.gentoo.org/glsa/201712-03"
},
{
"name": "1039978",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK",
"x_transferred"
],
"url": "http://www.securitytracker.com/id/1039978"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://www.openssl.org/news/secadv/20171207.txt"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability/"
},
{
"name": "RHSA-2018:0998",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2018:0998"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html"
},
{
"name": "DSA-4065",
"tags": [
"vendor-advisory",
"x_refsource_DEBIAN",
"x_transferred"
],
"url": "https://www.debian.org/security/2017/dsa-4065"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-179516.pdf"
},
{
"name": "102103",
"tags": [
"vdb-entry",
"x_refsource_BID",
"x_transferred"
],
"url": "http://www.securityfocus.com/bid/102103"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://www.tenable.com/security/tns-2017-16"
},
{
"name": "RHSA-2018:2187",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2018:2187"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20180117-0002/"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://security.netapp.com/advisory/ntap-20171208-0001/"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "OpenSSL",
"vendor": "OpenSSL Software Foundation",
"versions": [
{
"status": "affected",
"version": "1.0.2b-1.0.2m"
}
]
}
],
"datePublic": "2017-12-07T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an \"error state\" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. In order to exploit this issue an application bug would have to be present that resulted in a call to SSL_read()/SSL_write() being issued after having already received a fatal error. OpenSSL version 1.0.2b-1.0.2m are affected. Fixed in OpenSSL 1.0.2n. OpenSSL 1.1.0 is not affected."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Unauthenticated read/unencrypted write",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2019-07-23T22:31:33.000Z",
"orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
"shortName": "openssl"
},
"references": [
{
"name": "RHSA-2018:2185",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2018:2185"
},
{
"name": "RHSA-2018:2186",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2018:2186"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/openssl/openssl/commit/898fb884b706aaeb283de4812340bb0bde8476dc"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://security.netapp.com/advisory/ntap-20180419-0002/"
},
{
"name": "FreeBSD-SA-17:12",
"tags": [
"vendor-advisory",
"x_refsource_FREEBSD"
],
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-17:12.openssl.asc"
},
{
"name": "GLSA-201712-03",
"tags": [
"vendor-advisory",
"x_refsource_GENTOO"
],
"url": "https://security.gentoo.org/glsa/201712-03"
},
{
"name": "1039978",
"tags": [
"vdb-entry",
"x_refsource_SECTRACK"
],
"url": "http://www.securitytracker.com/id/1039978"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://www.openssl.org/news/secadv/20171207.txt"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability/"
},
{
"name": "RHSA-2018:0998",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2018:0998"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html"
},
{
"name": "DSA-4065",
"tags": [
"vendor-advisory",
"x_refsource_DEBIAN"
],
"url": "https://www.debian.org/security/2017/dsa-4065"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-179516.pdf"
},
{
"name": "102103",
"tags": [
"vdb-entry",
"x_refsource_BID"
],
"url": "http://www.securityfocus.com/bid/102103"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://www.tenable.com/security/tns-2017-16"
},
{
"name": "RHSA-2018:2187",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2018:2187"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://security.netapp.com/advisory/ntap-20180117-0002/"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://security.netapp.com/advisory/ntap-20171208-0001/"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "openssl-security@openssl.org",
"DATE_PUBLIC": "2017-12-07T00:00:00",
"ID": "CVE-2017-3737",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "OpenSSL",
"version": {
"version_data": [
{
"version_value": "1.0.2b-1.0.2m"
}
]
}
}
]
},
"vendor_name": "OpenSSL Software Foundation"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an \"error state\" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. In order to exploit this issue an application bug would have to be present that resulted in a call to SSL_read()/SSL_write() being issued after having already received a fatal error. OpenSSL version 1.0.2b-1.0.2m are affected. Fixed in OpenSSL 1.0.2n. OpenSSL 1.1.0 is not affected."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "Unauthenticated read/unencrypted write"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "RHSA-2018:2185",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2018:2185"
},
{
"name": "RHSA-2018:2186",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2018:2186"
},
{
"name": "https://github.com/openssl/openssl/commit/898fb884b706aaeb283de4812340bb0bde8476dc",
"refsource": "CONFIRM",
"url": "https://github.com/openssl/openssl/commit/898fb884b706aaeb283de4812340bb0bde8476dc"
},
{
"name": "http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html",
"refsource": "CONFIRM",
"url": "http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html"
},
{
"name": "http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html",
"refsource": "CONFIRM",
"url": "http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html"
},
{
"name": "https://security.netapp.com/advisory/ntap-20180419-0002/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20180419-0002/"
},
{
"name": "FreeBSD-SA-17:12",
"refsource": "FREEBSD",
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-17:12.openssl.asc"
},
{
"name": "GLSA-201712-03",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/201712-03"
},
{
"name": "1039978",
"refsource": "SECTRACK",
"url": "http://www.securitytracker.com/id/1039978"
},
{
"name": "https://www.openssl.org/news/secadv/20171207.txt",
"refsource": "CONFIRM",
"url": "https://www.openssl.org/news/secadv/20171207.txt"
},
{
"name": "https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability/",
"refsource": "MISC",
"url": "https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability/"
},
{
"name": "RHSA-2018:0998",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2018:0998"
},
{
"name": "http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html",
"refsource": "CONFIRM",
"url": "http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html"
},
{
"name": "DSA-4065",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2017/dsa-4065"
},
{
"name": "https://cert-portal.siemens.com/productcert/pdf/ssa-179516.pdf",
"refsource": "CONFIRM",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-179516.pdf"
},
{
"name": "102103",
"refsource": "BID",
"url": "http://www.securityfocus.com/bid/102103"
},
{
"name": "https://www.tenable.com/security/tns-2017-16",
"refsource": "CONFIRM",
"url": "https://www.tenable.com/security/tns-2017-16"
},
{
"name": "RHSA-2018:2187",
"refsource": "REDHAT",
"url": "https://access.redhat.com/errata/RHSA-2018:2187"
},
{
"name": "https://security.netapp.com/advisory/ntap-20180117-0002/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20180117-0002/"
},
{
"name": "https://security.netapp.com/advisory/ntap-20171208-0001/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20171208-0001/"
},
{
"name": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html",
"refsource": "MISC",
"url": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
"assignerShortName": "openssl",
"cveId": "CVE-2017-3737",
"datePublished": "2017-12-07T16:00:00.000Z",
"dateReserved": "2016-12-16T00:00:00.000Z",
"dateUpdated": "2024-09-17T03:53:31.262Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
Loading…
Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
Loading…
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.
Loading…
Loading…
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.
Loading…
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.
Loading…
Loading…