MediumFix available
openssl — security advisory
Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).
- Products
- openssl
- Affected versions
- Not specified
- Fixed versions
- 1.0.2o-r0
- CVEs
- CVE-2018-0739
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 21:56 UTC · Revision 1
Source evidence
Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).
osv:ALPINE-CVE-2018-0739
openssl
Fixed versions: 1.0.2o-r0
openssl
Fixed versions: 1.0.2o-r0
openssl
Fixed versions: 1.0.2o-r0
openssl
Fixed versions: 1.0.2o-r0
openssl
Fixed versions: 1.0.2o-r0
openssl
Fixed versions: 1.0.2o-r0
Complete source record
{
"id": "c1a2da6d267aa3e6cfe9ed7e9d8f7e93631e835668476b710b86455837fa7245",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2018-0739",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2018-0739",
"summary": "Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).",
"evidence": "osv:ALPINE-CVE-2018-0739",
"products": [
{
"name": {
"value": "openssl",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.0.2o-r0",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openssl",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.0.2o-r0",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openssl",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.0.2o-r0",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openssl",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.0.2o-r0",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openssl",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.0.2o-r0",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "openssl",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.0.2o-r0",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "ALPINE-CVE-2018-0739",
"aliases": [
"ALPINE-CVE-2018-0739"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.0.2b"
},
{
"fixed": "1.0.2o-r0"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:apk/alpine/openssl?arch=source",
"ecosystem": "Alpine:v3.3"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-0739.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.0.2b"
},
{
"fixed": "1.0.2o-r0"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:apk/alpine/openssl?arch=source",
"ecosystem": "Alpine:v3.4"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-0739.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.0.2b"
},
{
"fixed": "1.0.2o-r0"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:apk/alpine/openssl?arch=source",
"ecosystem": "Alpine:v3.5"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-0739.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.0.2b"
},
{
"fixed": "1.0.2o-r0"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:apk/alpine/openssl?arch=source",
"ecosystem": "Alpine:v3.6"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-0739.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.0.2b"
},
{
"fixed": "1.0.2o-r0"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:apk/alpine/openssl?arch=source",
"ecosystem": "Alpine:v3.7"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-0739.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.0.2b"
},
{
"fixed": "1.0.2o-r0"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:apk/alpine/openssl?arch=source",
"ecosystem": "Alpine:v3.8"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2018-0739.json"
},
"ecosystem_specific": {}
}
],
"modified": "2026-10-23T17:17:55.146879215Z",
"provider": "osv",
"upstream": [
"CVE-2018-0739"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2018-0739"
]
},
"related_cves": [
{
"value": "CVE-2018-0739",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 414933,
"published_at": "2018-03-27T21:29:00.673+00:00"
}