usn-6611-1
Vulnerability from osv_ubuntu
Published
2024-01-29 10:52
Modified
2026-06-25 10:46
Summary
exim4 vulnerability
Details
It was discovered that Exim incorrectly handled certain requests. A remote attacker could possibly use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism.
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2023-51766",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "exim4",
"binary_version": "4.86.2-2ubuntu2.6+esm6"
},
{
"binary_name": "exim4-base",
"binary_version": "4.86.2-2ubuntu2.6+esm6"
},
{
"binary_name": "exim4-config",
"binary_version": "4.86.2-2ubuntu2.6+esm6"
},
{
"binary_name": "exim4-daemon-heavy",
"binary_version": "4.86.2-2ubuntu2.6+esm6"
},
{
"binary_name": "exim4-daemon-light",
"binary_version": "4.86.2-2ubuntu2.6+esm6"
},
{
"binary_name": "eximon4",
"binary_version": "4.86.2-2ubuntu2.6+esm6"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "exim4",
"purl": "pkg:deb/ubuntu/exim4@4.86.2-2ubuntu2.6+esm6?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.86.2-2ubuntu2.6+esm6"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.86-3ubuntu1",
"4.86-7ubuntu1",
"4.86-7ubuntu2",
"4.86-7ubuntu3",
"4.86.2-2ubuntu1",
"4.86.2-2ubuntu2",
"4.86.2-2ubuntu2.1",
"4.86.2-2ubuntu2.2",
"4.86.2-2ubuntu2.3",
"4.86.2-2ubuntu2.4",
"4.86.2-2ubuntu2.5",
"4.86.2-2ubuntu2.6",
"4.86.2-2ubuntu2.6+esm1",
"4.86.2-2ubuntu2.6+esm2",
"4.86.2-2ubuntu2.6+esm4",
"4.86.2-2ubuntu2.6+esm5"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2023-51766",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "exim4",
"binary_version": "4.90.1-1ubuntu1.10+esm3"
},
{
"binary_name": "exim4-base",
"binary_version": "4.90.1-1ubuntu1.10+esm3"
},
{
"binary_name": "exim4-config",
"binary_version": "4.90.1-1ubuntu1.10+esm3"
},
{
"binary_name": "exim4-daemon-heavy",
"binary_version": "4.90.1-1ubuntu1.10+esm3"
},
{
"binary_name": "exim4-daemon-light",
"binary_version": "4.90.1-1ubuntu1.10+esm3"
},
{
"binary_name": "eximon4",
"binary_version": "4.90.1-1ubuntu1.10+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "exim4",
"purl": "pkg:deb/ubuntu/exim4@4.90.1-1ubuntu1.10+esm3?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.90.1-1ubuntu1.10+esm3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.89-5ubuntu1",
"4.89-9ubuntu1",
"4.89-9ubuntu2",
"4.89-9ubuntu3",
"4.89-9ubuntu4",
"4.90.1-1ubuntu1",
"4.90.1-1ubuntu1.1",
"4.90.1-1ubuntu1.2",
"4.90.1-1ubuntu1.3",
"4.90.1-1ubuntu1.4",
"4.90.1-1ubuntu1.5",
"4.90.1-1ubuntu1.8",
"4.90.1-1ubuntu1.9",
"4.90.1-1ubuntu1.10",
"4.90.1-1ubuntu1.10+esm1",
"4.90.1-1ubuntu1.10+esm2"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2023-51766",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "exim4",
"binary_version": "4.93-13ubuntu1.10"
},
{
"binary_name": "exim4-base",
"binary_version": "4.93-13ubuntu1.10"
},
{
"binary_name": "exim4-config",
"binary_version": "4.93-13ubuntu1.10"
},
{
"binary_name": "exim4-daemon-heavy",
"binary_version": "4.93-13ubuntu1.10"
},
{
"binary_name": "exim4-daemon-light",
"binary_version": "4.93-13ubuntu1.10"
},
{
"binary_name": "eximon4",
"binary_version": "4.93-13ubuntu1.10"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "exim4",
"purl": "pkg:deb/ubuntu/exim4@4.93-13ubuntu1.10?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.93-13ubuntu1.10"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.92.1-1ubuntu3",
"4.92.1-1ubuntu4",
"4.93~RC2-1ubuntu1",
"4.93-9ubuntu1",
"4.93-11ubuntu1",
"4.93-12ubuntu1",
"4.93-13ubuntu1",
"4.93-13ubuntu1.1",
"4.93-13ubuntu1.5",
"4.93-13ubuntu1.6",
"4.93-13ubuntu1.7",
"4.93-13ubuntu1.8",
"4.93-13ubuntu1.9"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2023-51766",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "exim4",
"binary_version": "4.95-4ubuntu2.5"
},
{
"binary_name": "exim4-base",
"binary_version": "4.95-4ubuntu2.5"
},
{
"binary_name": "exim4-config",
"binary_version": "4.95-4ubuntu2.5"
},
{
"binary_name": "exim4-daemon-heavy",
"binary_version": "4.95-4ubuntu2.5"
},
{
"binary_name": "exim4-daemon-light",
"binary_version": "4.95-4ubuntu2.5"
},
{
"binary_name": "eximon4",
"binary_version": "4.95-4ubuntu2.5"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "exim4",
"purl": "pkg:deb/ubuntu/exim4@4.95-4ubuntu2.5?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.95-4ubuntu2.5"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.94.2-7ubuntu2",
"4.95-2ubuntu2",
"4.95-4ubuntu1",
"4.95-4ubuntu2",
"4.95-4ubuntu2.1",
"4.95-4ubuntu2.2",
"4.95-4ubuntu2.3",
"4.95-4ubuntu2.4"
]
}
],
"aliases": [],
"details": "It was discovered that Exim incorrectly handled certain requests.\nA remote attacker could possibly use a published exploitation technique\nto inject e-mail messages with a spoofed MAIL FROM address, allowing bypass\nof an SPF protection mechanism.\n",
"id": "USN-6611-1",
"modified": "2026-06-25T10:46:18Z",
"published": "2024-01-29T10:52:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-6611-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2023-51766"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "exim4 vulnerability",
"upstream": [
"UBUNTU-CVE-2023-51766"
]
}
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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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