HighFix available
dnspython — security advisory
eventlet before 0.35.2, as used in dnspython before 2.6.0, allows remote attackers to interfere with DNS name resolution by quickly sending an invalid packet from the expected IP address and source port, aka a "TuDoor" attack. In other words, dnspython does not have the preferred behavior in which the DNS name resolution algorithm would proceed, within the full time window, in order to wait for a valid packet. NOTE: dnspython 2.6.0 is unusable for a different reason that was addressed in 2.6.1.
- Products
- dnspython
- Affected versions
- 2.3.0-1, 2.4.0-1, 2.4.0~rc1-1, 2.4.1-1, 2.4.2-1, 2.5.0-1, 2.5.0~rc1-1, 2.6.0-1, 2.6.0~rc1-1, 2.6.1-1, 2.7.0-1, 2.7.0~rc1-1, 2.8.0-1, 2.8.0-2, 2.8.0-3, 2.8.0-4, 2.8.0-5, 2.8.0-6
- Fixed versions
- 2.6.0-1
- CVEs
- CVE-2023-29483
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 15:30 UTC · Revision 1
Source evidence
eventlet before 0.35.2, as used in dnspython before 2.6.0, allows remote attackers to interfere with DNS name resolution by quickly sending an invalid packet from the expected IP address and source port, aka a "TuDoor" attack. In other words, dnspython does not have the preferred behavior in which the DNS name resolution algorithm would proceed, within the full time window, in order to wait for a valid packet. NOTE: dnspython 2.6.0 is unusable for a different reason that was addressed in 2.6.1.
osv:DEBIAN-CVE-2023-29483
dnspython
Fixed versions: Not specified
dnspython
Fixed versions: 2.6.0-1
dnspython
Fixed versions: 2.6.0-1
Complete source record
{
"id": "3bd8b8ee95916671a3ea26da4646ecf73b753df83f56de86695d31303002d2dc",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-29483",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2023-29483",
"summary": "eventlet before 0.35.2, as used in dnspython before 2.6.0, allows remote attackers to interfere with DNS name resolution by quickly sending an invalid packet from the expected IP address and source port, aka a \"TuDoor\" attack. In other words, dnspython does not have the preferred behavior in which the DNS name resolution algorithm would proceed, within the full time window, in order to wait for a valid packet. NOTE: dnspython 2.6.0 is unusable for a different reason that was addressed in 2.6.1.",
"evidence": "osv:DEBIAN-CVE-2023-29483",
"products": [
{
"name": {
"value": "dnspython",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.3.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.0~rc1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.5.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.5.0~rc1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.6.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.6.0~rc1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.6.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.7.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.7.0~rc1-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.8.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.8.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.8.0-3",
"evidence": "/affected/0/versions"
},
{
"value": "2.8.0-4",
"evidence": "/affected/0/versions"
},
{
"value": "2.8.0-5",
"evidence": "/affected/0/versions"
},
{
"value": "2.8.0-6",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "dnspython",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.6.0-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "dnspython",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.6.0-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2023-29483",
"aliases": [
"DEBIAN-CVE-2023-29483"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "dnspython",
"purl": "pkg:deb/debian/dnspython?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.3.0-1",
"2.4.0-1",
"2.4.0~rc1-1",
"2.4.1-1",
"2.4.2-1",
"2.5.0-1",
"2.5.0~rc1-1",
"2.6.0-1",
"2.6.0~rc1-1",
"2.6.1-1",
"2.7.0-1",
"2.7.0~rc1-1",
"2.8.0-1",
"2.8.0-2",
"2.8.0-3",
"2.8.0-4",
"2.8.0-5",
"2.8.0-6"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-29483.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.0-1"
}
]
}
],
"package": {
"name": "dnspython",
"purl": "pkg:deb/debian/dnspython?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-29483.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.0-1"
}
]
}
],
"package": {
"name": "dnspython",
"purl": "pkg:deb/debian/dnspython?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-29483.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T18:00:50.720131650Z",
"provider": "osv",
"upstream": [
"CVE-2023-29483"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2023-29483"
]
},
"related_cves": [
{
"value": "CVE-2023-29483",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 455205,
"published_at": "2024-04-11T14:15:12.01+00:00"
}