gsd-2021-4189
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
A flaw was found in Python, specifically in the FTP (File Transfer Protocol) client library in PASV (passive) mode. The issue is how the FTP client trusts the host from the PASV response by default. This flaw allows an attacker to set up a malicious FTP server that can trick FTP clients into connecting back to a given IP address and port. This vulnerability could lead to FTP client scanning ports, which otherwise would not have been possible.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-4189",
"description": "A flaw was found in Python, specifically in the FTP (File Transfer Protocol) client library in PASV (passive) mode. The issue is how the FTP client trusts the host from the PASV response by default. This flaw allows an attacker to set up a malicious FTP server that can trick FTP clients into connecting back to a given IP address and port. This vulnerability could lead to FTP client scanning ports, which otherwise would not have been possible.",
"id": "GSD-2021-4189",
"references": [
"https://www.suse.com/security/cve/CVE-2021-4189.html",
"https://access.redhat.com/errata/RHSA-2021:3254",
"https://ubuntu.com/security/CVE-2021-4189",
"https://alas.aws.amazon.com/cve/html/CVE-2021-4189.html",
"https://linux.oracle.com/cve/CVE-2021-4189.html",
"https://access.redhat.com/errata/RHSA-2022:1663",
"https://access.redhat.com/errata/RHSA-2022:1821",
"https://access.redhat.com/errata/RHSA-2022:1986",
"https://advisories.mageia.org/CVE-2021-4189.html"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2021-4189"
],
"details": "A flaw was found in Python, specifically in the FTP (File Transfer Protocol) client library in PASV (passive) mode. The issue is how the FTP client trusts the host from the PASV response by default. This flaw allows an attacker to set up a malicious FTP server that can trick FTP clients into connecting back to a given IP address and port. This vulnerability could lead to FTP client scanning ports, which otherwise would not have been possible.",
"id": "GSD-2021-4189",
"modified": "2023-12-13T01:23:11.574568Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "secalert@redhat.com",
"ID": "CVE-2021-4189",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "python",
"version": {
"version_data": [
{
"version_value": "Fixed in python 3.6.14, python 3.7.11, python 3.8.9, python 3.9.3, python 3.10.0"
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "A flaw was found in Python, specifically in the FTP (File Transfer Protocol) client library in PASV (passive) mode. The issue is how the FTP client trusts the host from the PASV response by default. This flaw allows an attacker to set up a malicious FTP server that can trick FTP clients into connecting back to a given IP address and port. This vulnerability could lead to FTP client scanning ports, which otherwise would not have been possible."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "Not-Known"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://bugs.python.org/issue43285",
"refsource": "MISC",
"url": "https://bugs.python.org/issue43285"
},
{
"name": "https://python-security.readthedocs.io/vuln/ftplib-pasv.html",
"refsource": "MISC",
"url": "https://python-security.readthedocs.io/vuln/ftplib-pasv.html"
},
{
"name": "https://github.com/python/cpython/commit/0ab152c6b5d95caa2dc1a30fa96e10258b5f188e",
"refsource": "MISC",
"url": "https://github.com/python/cpython/commit/0ab152c6b5d95caa2dc1a30fa96e10258b5f188e"
},
{
"name": "https://security-tracker.debian.org/tracker/CVE-2021-4189",
"refsource": "MISC",
"url": "https://security-tracker.debian.org/tracker/CVE-2021-4189"
},
{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=2036020",
"refsource": "MISC",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2036020"
},
{
"name": "https://access.redhat.com/security/cve/CVE-2021-4189",
"refsource": "MISC",
"url": "https://access.redhat.com/security/cve/CVE-2021-4189"
},
{
"name": "https://security.netapp.com/advisory/ntap-20221104-0004/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20221104-0004/"
},
{
"name": "[debian-lts-announce] 20230524 [SECURITY] [DLA 3432-1] python2.7 security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html"
},
{
"name": "[debian-lts-announce] 20230630 [SECURITY] [DLA 3477-1] python3.7 security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html"
}
]
}
},
"nvd.nist.gov": {
"configurations": {
"CVE_data_version": "4.0",
"nodes": [
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "3.9.3",
"versionStartIncluding": "3.9.0",
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "3.8.9",
"versionStartIncluding": "3.8.0",
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "3.7.11",
"versionStartIncluding": "3.7.0",
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
"cpe_name": [],
"versionEndExcluding": "3.6.14",
"versionStartIncluding": "3.6.0",
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:python:python:3.10.0:-:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:a:redhat:software_collections:-:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
}
]
},
"cve": {
"CVE_data_meta": {
"ASSIGNER": "secalert@redhat.com",
"ID": "CVE-2021-4189"
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "en",
"value": "A flaw was found in Python, specifically in the FTP (File Transfer Protocol) client library in PASV (passive) mode. The issue is how the FTP client trusts the host from the PASV response by default. This flaw allows an attacker to set up a malicious FTP server that can trick FTP clients into connecting back to a given IP address and port. This vulnerability could lead to FTP client scanning ports, which otherwise would not have been possible."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "en",
"value": "CWE-252"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://github.com/python/cpython/commit/0ab152c6b5d95caa2dc1a30fa96e10258b5f188e",
"refsource": "MISC",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/python/cpython/commit/0ab152c6b5d95caa2dc1a30fa96e10258b5f188e"
},
{
"name": "https://access.redhat.com/security/cve/CVE-2021-4189",
"refsource": "MISC",
"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/security/cve/CVE-2021-4189"
},
{
"name": "https://bugzilla.redhat.com/show_bug.cgi?id=2036020",
"refsource": "MISC",
"tags": [
"Issue Tracking",
"Patch",
"Third Party Advisory"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2036020"
},
{
"name": "https://security-tracker.debian.org/tracker/CVE-2021-4189",
"refsource": "MISC",
"tags": [
"Third Party Advisory"
],
"url": "https://security-tracker.debian.org/tracker/CVE-2021-4189"
},
{
"name": "https://bugs.python.org/issue43285",
"refsource": "MISC",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://bugs.python.org/issue43285"
},
{
"name": "https://python-security.readthedocs.io/vuln/ftplib-pasv.html",
"refsource": "MISC",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://python-security.readthedocs.io/vuln/ftplib-pasv.html"
},
{
"name": "https://security.netapp.com/advisory/ntap-20221104-0004/",
"refsource": "CONFIRM",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20221104-0004/"
},
{
"name": "[debian-lts-announce] 20230524 [SECURITY] [DLA 3432-1] python2.7 security update",
"refsource": "MLIST",
"tags": [],
"url": "https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html"
},
{
"name": "[debian-lts-announce] 20230630 [SECURITY] [DLA 3477-1] python3.7 security update",
"refsource": "MLIST",
"tags": [],
"url": "https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html"
}
]
}
},
"impact": {
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4
}
},
"lastModifiedDate": "2023-06-30T23:15Z",
"publishedDate": "2022-08-24T16:15Z"
}
}
}
Loading...
Loading...
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.