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PYSEC-2018-23
Vulnerability from pysec - Published: 2018-10-08 15:29 - Updated: 2021-06-10 06:50
VLAI
Details
Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After Free vulnerability in X509 object handling that can result in Use after free can lead to possible denial of service or remote code execution.. This attack appear to be exploitable via Depends on the calling application and if it retains a reference to the memory.. This vulnerability appears to have been fixed in 17.5.0.
Impacted products
| Name | purl | pyopenssl | pkg:pypi/pyopenssl |
|---|
Aliases
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "pyopenssl",
"purl": "pkg:pypi/pyopenssl"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "17.5.0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.10",
"0.11",
"0.12",
"0.13",
"0.13.1",
"0.14",
"0.15",
"0.15.1",
"0.6",
"0.7",
"0.8",
"0.9",
"16.0.0",
"16.1.0",
"16.2.0",
"17.0.0",
"17.1.0",
"17.2.0",
"17.3.0",
"17.4.0"
]
}
],
"aliases": [
"CVE-2018-1000807",
"GHSA-p28m-34f6-967q"
],
"details": "Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After Free vulnerability in X509 object handling that can result in Use after free can lead to possible denial of service or remote code execution.. This attack appear to be exploitable via Depends on the calling application and if it retains a reference to the memory.. This vulnerability appears to have been fixed in 17.5.0.",
"id": "PYSEC-2018-23",
"modified": "2021-06-10T06:50:39.370732Z",
"published": "2018-10-08T15:29:00Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/pull/723"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3813-1/"
},
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2019:0085"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-p28m-34f6-967q"
}
]
}
BREW-AWS-SAM-CLI-CVE-201… (GHSA-P28M-34F6-967Q)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:37 – Updated: 2026-09-10 18:54 – Source website
VLAI
Summary
PyOpenSSL Use-After-Free vulnerability
Details
It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.
Severity
8.1 (High)
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyopenssl",
"resource_purl": "pkg:pypi/pyopenssl@26.4.0",
"upstream_fixed_in": "17.5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "aws-sam-cli",
"purl": "pkg:brew/aws-sam-cli"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.165.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyopenssl@26.4.0",
"name": "pyopenssl",
"resource": "pyopenssl",
"strategy": "registry",
"subject_version": "26.4.0"
}
]
},
"details": "It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.",
"id": "BREW-aws-sam-cli-CVE-2018-1000807",
"modified": "2026-09-10T18:54:05Z",
"published": "2026-08-13T16:37:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000807"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/pull/723"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0085"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyca/pyopenssl"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-23.yaml"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3813-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "PyOpenSSL Use-After-Free vulnerability",
"upstream": [
"GHSA-p28m-34f6-967q",
"CVE-2018-1000807",
"PYSEC-2018-23"
]
}
BREW-AZURE-CLI-CVE-2018-… (GHSA-P28M-34F6-967Q)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:37 – Updated: 2026-09-17 20:03 – Source website
VLAI
Summary
PyOpenSSL Use-After-Free vulnerability
Details
It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.
Severity
8.1 (High)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyOpenSSL",
"resource_purl": "pkg:pypi/pyopenssl@26.2.0",
"upstream_fixed_in": "17.5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "azure-cli",
"purl": "pkg:brew/azure-cli"
},
"ranges": [
{
"events": [
{
"introduced": "2.0.17"
},
{
"fixed": "2.0.22"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyopenssl@26.2.0",
"name": "pyopenssl",
"resource": "pyOpenSSL",
"strategy": "registry",
"subject_version": "26.2.0"
}
]
},
"details": "It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.",
"id": "BREW-azure-cli-CVE-2018-1000807",
"modified": "2026-09-17T20:03:39Z",
"published": "2026-08-13T16:37:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000807"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/pull/723"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0085"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyca/pyopenssl"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-23.yaml"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3813-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "PyOpenSSL Use-After-Free vulnerability",
"upstream": [
"GHSA-p28m-34f6-967q",
"CVE-2018-1000807",
"PYSEC-2018-23"
]
}
BREW-CERTBOT-CVE-2018-1000807 (GHSA-P28M-34F6-967Q)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:39 – Updated: 2026-09-09 23:45 – Source website
VLAI
Summary
PyOpenSSL Use-After-Free vulnerability
Details
It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.
Severity
8.1 (High)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyopenssl",
"resource_purl": "pkg:pypi/pyopenssl@26.4.0",
"upstream_fixed_in": "17.5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "certbot",
"purl": "pkg:brew/certbot"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.7.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyopenssl@26.4.0",
"name": "pyopenssl",
"resource": "pyopenssl",
"strategy": "registry",
"subject_version": "26.4.0"
}
]
},
"details": "It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.",
"id": "BREW-certbot-CVE-2018-1000807",
"modified": "2026-09-09T23:45:58Z",
"published": "2026-08-13T16:39:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000807"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/pull/723"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0085"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyca/pyopenssl"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-23.yaml"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3813-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "PyOpenSSL Use-After-Free vulnerability",
"upstream": [
"GHSA-p28m-34f6-967q",
"CVE-2018-1000807",
"PYSEC-2018-23"
]
}
BREW-CERTSYNC-CVE-2018-1000807 (GHSA-P28M-34F6-967Q)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:39 – Updated: 2026-09-09 23:45 – Source website
VLAI
Summary
PyOpenSSL Use-After-Free vulnerability
Details
It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.
Severity
8.1 (High)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyopenssl",
"resource_purl": "pkg:pypi/pyopenssl@26.3.0",
"upstream_fixed_in": "17.5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "certsync",
"purl": "pkg:brew/certsync"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.1.6_11"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyopenssl@26.3.0",
"name": "pyopenssl",
"resource": "pyopenssl",
"strategy": "registry",
"subject_version": "26.3.0"
}
]
},
"details": "It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.",
"id": "BREW-certsync-CVE-2018-1000807",
"modified": "2026-09-09T23:45:59Z",
"published": "2026-08-13T16:39:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000807"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/pull/723"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0085"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyca/pyopenssl"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-23.yaml"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3813-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "PyOpenSSL Use-After-Free vulnerability",
"upstream": [
"GHSA-p28m-34f6-967q",
"CVE-2018-1000807",
"PYSEC-2018-23"
]
}
BREW-CHECKDMARC-CVE-2018… (GHSA-P28M-34F6-967Q)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:39 – Updated: 2026-08-19 08:43 – Source website
VLAI
Summary
PyOpenSSL Use-After-Free vulnerability
Details
It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.
Severity
8.1 (High)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyopenssl",
"resource_purl": "pkg:pypi/pyopenssl@26.4.0",
"upstream_fixed_in": "17.5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "checkdmarc",
"purl": "pkg:brew/checkdmarc"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.17.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyopenssl@26.4.0",
"name": "pyopenssl",
"resource": "pyopenssl",
"strategy": "registry",
"subject_version": "26.4.0"
},
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyopenssl@26.4.0",
"name": "pyopenssl",
"resource": "pyopenssl",
"strategy": "registry",
"subject_version": "26.4.0"
}
]
},
"details": "It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.",
"id": "BREW-checkdmarc-CVE-2018-1000807",
"modified": "2026-08-19T08:43:10Z",
"published": "2026-08-13T16:39:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000807"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/pull/723"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0085"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyca/pyopenssl"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-23.yaml"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3813-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "PyOpenSSL Use-After-Free vulnerability",
"upstream": [
"GHSA-p28m-34f6-967q",
"CVE-2018-1000807",
"PYSEC-2018-23"
]
}
BREW-COPYPARTY-CVE-2018-… (GHSA-P28M-34F6-967Q)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:41 – Updated: 2026-09-09 23:48 – Source website
VLAI
Summary
PyOpenSSL Use-After-Free vulnerability
Details
It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.
Severity
8.1 (High)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyopenssl",
"resource_purl": "pkg:pypi/pyopenssl@26.4.0",
"upstream_fixed_in": "17.5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "copyparty",
"purl": "pkg:brew/copyparty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.20.20"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyopenssl@26.4.0",
"name": "pyopenssl",
"resource": "pyopenssl",
"strategy": "registry",
"subject_version": "26.4.0"
}
]
},
"details": "It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.",
"id": "BREW-copyparty-CVE-2018-1000807",
"modified": "2026-09-09T23:48:44Z",
"published": "2026-08-13T16:41:06Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000807"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/pull/723"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0085"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyca/pyopenssl"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-23.yaml"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3813-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "PyOpenSSL Use-After-Free vulnerability",
"upstream": [
"GHSA-p28m-34f6-967q",
"CVE-2018-1000807",
"PYSEC-2018-23"
]
}
BREW-CVE-BIN-TOOL-CVE-20… (GHSA-P28M-34F6-967Q)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:42 – Updated: 2026-09-10 19:04 – Source website
VLAI
Summary
PyOpenSSL Use-After-Free vulnerability
Details
It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.
Severity
8.1 (High)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyopenssl",
"resource_purl": "pkg:pypi/pyopenssl@26.0.0",
"upstream_fixed_in": "17.5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "cve-bin-tool",
"purl": "pkg:brew/cve-bin-tool"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4_2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyopenssl@26.0.0",
"name": "pyopenssl",
"resource": "pyopenssl",
"strategy": "registry",
"subject_version": "26.0.0"
}
]
},
"details": "It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.",
"id": "BREW-cve-bin-tool-CVE-2018-1000807",
"modified": "2026-09-10T19:04:07Z",
"published": "2026-08-13T16:42:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000807"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/pull/723"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0085"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyca/pyopenssl"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-23.yaml"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3813-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "PyOpenSSL Use-After-Free vulnerability",
"upstream": [
"GHSA-p28m-34f6-967q",
"CVE-2018-1000807",
"PYSEC-2018-23"
]
}
BREW-DNSROBOCERT-CVE-201… (GHSA-P28M-34F6-967Q)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:43 – Updated: 2026-09-09 23:51 – Source website
VLAI
Summary
PyOpenSSL Use-After-Free vulnerability
Details
It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.
Severity
8.1 (High)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyopenssl",
"resource_purl": "pkg:pypi/pyopenssl@26.4.0",
"upstream_fixed_in": "17.5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "dnsrobocert",
"purl": "pkg:brew/dnsrobocert"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.27.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyopenssl@26.4.0",
"name": "pyopenssl",
"resource": "pyopenssl",
"strategy": "registry",
"subject_version": "26.4.0"
}
]
},
"details": "It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.",
"id": "BREW-dnsrobocert-CVE-2018-1000807",
"modified": "2026-09-09T23:51:44Z",
"published": "2026-08-13T16:43:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000807"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/pull/723"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0085"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyca/pyopenssl"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-23.yaml"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3813-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "PyOpenSSL Use-After-Free vulnerability",
"upstream": [
"GHSA-p28m-34f6-967q",
"CVE-2018-1000807",
"PYSEC-2018-23"
]
}
BREW-DUPLICITY-CVE-2018-… (GHSA-P28M-34F6-967Q)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:44 – Updated: 2026-09-09 23:52 – Source website
VLAI
Summary
PyOpenSSL Use-After-Free vulnerability
Details
It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.
Severity
8.1 (High)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyopenssl",
"resource_purl": "pkg:pypi/pyopenssl@24.2.1",
"upstream_fixed_in": "17.5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "duplicity",
"purl": "pkg:brew/duplicity"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.0_2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyopenssl@24.2.1",
"name": "pyopenssl",
"resource": "pyopenssl",
"strategy": "registry",
"subject_version": "24.2.1"
}
]
},
"details": "It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.",
"id": "BREW-duplicity-CVE-2018-1000807",
"modified": "2026-09-09T23:52:33Z",
"published": "2026-08-13T16:44:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000807"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/pull/723"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0085"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyca/pyopenssl"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-23.yaml"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3813-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "PyOpenSSL Use-After-Free vulnerability",
"upstream": [
"GHSA-p28m-34f6-967q",
"CVE-2018-1000807",
"PYSEC-2018-23"
]
}
BREW-DVC-CVE-2018-1000807 (GHSA-P28M-34F6-967Q)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:44 – Updated: 2026-09-09 23:52 – Source website
VLAI
Summary
PyOpenSSL Use-After-Free vulnerability
Details
It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.
Severity
8.1 (High)
References
| URL | Type | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyopenssl",
"resource_purl": "pkg:pypi/pyopenssl@22.0.0",
"upstream_fixed_in": "17.5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "dvc",
"purl": "pkg:brew/dvc"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.67.1_14"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyopenssl@22.0.0",
"name": "pyopenssl",
"resource": "pyopenssl",
"strategy": "registry",
"subject_version": "22.0.0"
}
]
},
"details": "It was discovered that pyOpenSSL incorrectly handled memory when handling X509 objects. A remote attacker could use this issue to cause pyOpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. This attack appears to be exploitable via Depends on the calling application and if it retains a reference to the memory. This vulnerability appears to have been fixed in 17.5.0.",
"id": "BREW-dvc-CVE-2018-1000807",
"modified": "2026-09-09T23:52:57Z",
"published": "2026-08-13T16:44:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000807"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/pull/723"
},
{
"type": "WEB",
"url": "https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:0085"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyca/pyopenssl"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyopenssl/PYSEC-2018-23.yaml"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3813-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "PyOpenSSL Use-After-Free vulnerability",
"upstream": [
"GHSA-p28m-34f6-967q",
"CVE-2018-1000807",
"PYSEC-2018-23"
]
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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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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