Medium
Security advisory
Python Software Foundation CPython version From 3.2 until 3.6.4 on Windows contains a Buffer Overflow vulnerability in os.symlink() function on Windows that can result in Arbitrary code execution, likely escalation of privilege. This attack appears to be exploitable via a python script that creates a symlink with an attacker controlled name or location. This vulnerability appears to have been fixed in 3.7.0 and 3.6.5.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-1000117
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 09:59 UTC · Revision 1
Source evidence
Python Software Foundation CPython version From 3.2 until 3.6.4 on Windows contains a Buffer Overflow vulnerability in os.symlink() function on Windows that can result in Arbitrary code execution, likely escalation of privilege. This attack appears to be exploitable via a python script that creates a symlink with an attacker controlled name or location. This vulnerability appears to have been fixed in 3.7.0 and 3.6.5.
osv:CVE-2018-1000117
Complete source record
{
"id": "68393c6088243f56c39f4a83042122676aafdc0403cafd358a726fe466930af8",
"url": "https://osv.dev/vulnerability/CVE-2018-1000117",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-1000117",
"summary": "Python Software Foundation CPython version From 3.2 until 3.6.4 on Windows contains a Buffer Overflow vulnerability in os.symlink() function on Windows that can result in Arbitrary code execution, likely escalation of privilege. This attack appears to be exploitable via a python script that creates a symlink with an attacker controlled name or location. This vulnerability appears to have been fixed in 3.7.0 and 3.6.5.",
"evidence": "osv:CVE-2018-1000117",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2018-1000117",
"aliases": [
"CVE-2018-1000117",
"PSF-2022-2"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/python/cpython",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "0a5a5af9b6b47727c5ee3def4508dab312949075"
},
{
"introduced": "2e789a1f1d84b343a996e8654590703b5fbdd441"
},
{
"fixed": "627d0c61ac96009450e3794a2401f244e56fcb79"
},
{
"introduced": "5c4568a05a0a62b5947c55f68f9f2ecfb90a4f12"
},
{
"fixed": "f59c0932b4e160f279fb98de4cdad2f58269e0a5"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.2.0"
},
{
"fixed": "3.4.9"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.5.0"
},
{
"fixed": "3.5.6"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.6.0"
},
{
"fixed": "3.6.5"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v3.5.6rc1",
"v3.4.9rc1",
"v3.6.5rc1",
"v3.5.5",
"v3.4.8",
"v3.5.5rc1",
"v3.4.8rc1",
"v3.4.7",
"v3.5.4",
"v3.5.4rc1",
"v3.4.7rc1",
"v3.6.2rc1",
"v3.4.6",
"v3.5.3",
"v3.5.3rc1",
"v3.4.6rc1",
"v3.6.0rc1",
"v3.6.0b4",
"v3.6.0b3",
"v3.6.0b1",
"v3.6.0a3",
"v3.4.5",
"v3.5.2",
"v3.4.5rc1",
"v3.5.2rc1",
"v3.5.1rc1",
"v3.5.0rc3",
"v3.5.0rc2",
"v3.5.0rc1",
"v3.5.0b4",
"v3.5.0b3",
"v3.5.0b1",
"v3.5.0a4",
"v3.5.0a3",
"v3.5.0a2",
"v3.4.3",
"v3.5.0a1",
"v3.4.3rc1",
"v3.4.2rc1",
"v3.4.1",
"v3.4.1rc1",
"v3.4.0",
"v3.4.0rc3",
"v3.4.0rc2",
"v3.4.0rc1",
"v3.4.0b3",
"v3.4.0b2",
"v3.4.0b1",
"v3.4.0a4",
"v3.4.0a3",
"v3.4.0a2",
"v3.4.0a1",
"v3.3.0rc3",
"v3.3.0rc2",
"v3.3.0rc1",
"v3.3.0b2",
"v3.3.0b1",
"v3.3.0a4",
"v3.3.0a3",
"v3.3.0a2",
"v3.2rc3",
"v3.2rc2",
"v3.2rc1",
"v3.2b2",
"v3.2b1",
"v3.2a4",
"v3.2a3",
"v3.2a2",
"v3.2a1",
"v3.1",
"v3.1rc2",
"v3.1rc1",
"v3.1b1",
"v3.1a2",
"v3.1a1",
"v3.0rc3",
"v3.0rc2",
"v3.0rc1",
"v3.0b3",
"v3.0b2",
"v3.0b1",
"v3.0a5",
"v3.0a4",
"v3.0a3",
"v3.0a2",
"v3.0a1",
"v2.4",
"v2.4c1",
"v2.4b2",
"v2.4b1",
"v2.4a3",
"v2.4a2",
"v2.4a1",
"v2.3c2",
"v2.3c1",
"v2.2a3",
"v2.1",
"v2.1c2",
"v2.1c1",
"v2.1b2",
"v2.1b1",
"v2.1a2",
"v2.1a1",
"v2.0",
"v2.0c1",
"v2.0b2",
"v2.0b1",
"v1.6a2",
"v1.6a1",
"v1.5.2",
"v1.5.2c1",
"v1.5.2b2",
"v1.5.2b1",
"v1.5.2a2",
"v1.5.2a1",
"v1.5.1",
"v1.5",
"v1.5b2",
"v1.5b1",
"v1.5a4",
"v1.5a3",
"v1.5a2",
"v1.5a1",
"v1.4",
"v1.4b3",
"v1.4b2",
"v1.4b1",
"v1.3",
"v1.3b1",
"v1.2",
"v1.2b4",
"v1.2b3",
"v1.2b2",
"v1.2b1",
"v1.1.1",
"v1.1",
"v1.0.2",
"v1.0.1",
"v0.9.9",
"v0.9.8"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-1000117.json"
}
}
],
"modified": "2026-10-20T10:49:37.219994258Z",
"provider": "osv",
"references": [
"https://bugs.python.org/issue33001",
"https://github.com/python/cpython/pull/5989"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:python:python:3.7.0:beta1:*:*:*:*:*:*",
"cpe:2.3:a:python:python:3.7.0:beta2:*:*:*:*:*:*",
"cpe:2.3:a:python:python:3.7.0:beta3:*:*:*:*:*:*",
"cpe:2.3:a:python:python:3.7.0:beta4:*:*:*:*:*:*",
"cpe:2.3:a:python:python:3.7.0:beta5:*:*:*:*:*:*"
],
"vendor_product": "python:python",
"extracted_events": [
{
"range": [
{
"introduced": "3.7.0-beta1"
},
{
"last_affected": "3.7.0-beta1"
},
{
"introduced": "3.7.0-beta2"
},
{
"last_affected": "3.7.0-beta2"
},
{
"introduced": "3.7.0-beta3"
},
{
"last_affected": "3.7.0-beta3"
},
{
"introduced": "3.7.0-beta4"
},
{
"last_affected": "3.7.0-beta4"
},
{
"introduced": "3.7.0-beta5"
},
{
"last_affected": "3.7.0-beta5"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-1000117",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 380612,
"published_at": "2018-03-07T14:29:00.28+00:00"
}