cve-2023-51766
Vulnerability from cvelistv5
Published
2023-12-24 00:00
Modified
2024-08-02 22:48
Severity ?
EPSS score ?
Summary
Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Exim supports <LF>.<CR><LF> but some other popular e-mail servers do not.
References
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T22:48:11.092Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/"
},
{
"tags": [
"x_transferred"
],
"url": "https://exim.org/static/doc/security/CVE-2023-51766.txt"
},
{
"tags": [
"x_transferred"
],
"url": "https://bugs.exim.org/show_bug.cgi?id=3063"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.openwall.com/lists/oss-security/2023/12/23/2"
},
{
"name": "[oss-security] 20231224 Re: Re: New SMTP smuggling attack",
"tags": [
"mailing-list",
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2023/12/24/1"
},
{
"name": "[oss-security] 20231225 Re: Re: New SMTP smuggling attack",
"tags": [
"mailing-list",
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2023/12/25/1"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.exim.org/exim.git/commit/5bb786d5ad568a88d50d15452aacc8404047e5ca"
},
{
"tags": [
"x_transferred"
],
"url": "https://git.exim.org/exim.git/commit/cf1376206284f2a4f11e32d931d4aade34c206c5"
},
{
"tags": [
"x_transferred"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2255852"
},
{
"tags": [
"x_transferred"
],
"url": "https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html"
},
{
"name": "[oss-security] 20231229 CVE-2023-51766: Exim: SMTP smuggling",
"tags": [
"mailing-list",
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2023/12/29/2"
},
{
"tags": [
"x_transferred"
],
"url": "https://github.com/Exim/exim/blob/master/doc/doc-txt/cve-2023-51766"
},
{
"name": "[oss-security] 20240101 Re: CVE-2023-51766: Exim: SMTP smuggling",
"tags": [
"mailing-list",
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/01/01/1"
},
{
"name": "[oss-security] 20240101 Re: CVE-2023-51766: Exim: SMTP smuggling",
"tags": [
"mailing-list",
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/01/01/2"
},
{
"name": "[oss-security] 20240101 Re: CVE-2023-51766: Exim: SMTP smuggling",
"tags": [
"mailing-list",
"x_transferred"
],
"url": "http://www.openwall.com/lists/oss-security/2024/01/01/3"
},
{
"tags": [
"x_transferred"
],
"url": "https://www.youtube.com/watch?v=V8KPV96g1To"
},
{
"name": "[debian-lts-announce] 20240105 [SECURITY] [DLA 3708-1] exim4 security update",
"tags": [
"mailing-list",
"x_transferred"
],
"url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00002.html"
},
{
"name": "FEDORA-2024-1ef6197a49",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QPDWHJPABVJCXDSNELSSVTIVAJU2MDUQ/"
},
{
"name": "FEDORA-2024-e0841c83bb",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORN7OKEQPPBKUHYRQ6LR5PSNBQVDHAWB/"
},
{
"tags": [
"x_transferred"
],
"url": "https://lwn.net/Articles/956533/"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Exim supports \u003cLF\u003e.\u003cCR\u003e\u003cLF\u003e but some other popular e-mail servers do not."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "n/a",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-01-18T02:47:22.078412",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/"
},
{
"url": "https://exim.org/static/doc/security/CVE-2023-51766.txt"
},
{
"url": "https://bugs.exim.org/show_bug.cgi?id=3063"
},
{
"url": "https://www.openwall.com/lists/oss-security/2023/12/23/2"
},
{
"name": "[oss-security] 20231224 Re: Re: New SMTP smuggling attack",
"tags": [
"mailing-list"
],
"url": "http://www.openwall.com/lists/oss-security/2023/12/24/1"
},
{
"name": "[oss-security] 20231225 Re: Re: New SMTP smuggling attack",
"tags": [
"mailing-list"
],
"url": "http://www.openwall.com/lists/oss-security/2023/12/25/1"
},
{
"url": "https://git.exim.org/exim.git/commit/5bb786d5ad568a88d50d15452aacc8404047e5ca"
},
{
"url": "https://git.exim.org/exim.git/commit/cf1376206284f2a4f11e32d931d4aade34c206c5"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2255852"
},
{
"url": "https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html"
},
{
"name": "[oss-security] 20231229 CVE-2023-51766: Exim: SMTP smuggling",
"tags": [
"mailing-list"
],
"url": "http://www.openwall.com/lists/oss-security/2023/12/29/2"
},
{
"url": "https://github.com/Exim/exim/blob/master/doc/doc-txt/cve-2023-51766"
},
{
"name": "[oss-security] 20240101 Re: CVE-2023-51766: Exim: SMTP smuggling",
"tags": [
"mailing-list"
],
"url": "http://www.openwall.com/lists/oss-security/2024/01/01/1"
},
{
"name": "[oss-security] 20240101 Re: CVE-2023-51766: Exim: SMTP smuggling",
"tags": [
"mailing-list"
],
"url": "http://www.openwall.com/lists/oss-security/2024/01/01/2"
},
{
"name": "[oss-security] 20240101 Re: CVE-2023-51766: Exim: SMTP smuggling",
"tags": [
"mailing-list"
],
"url": "http://www.openwall.com/lists/oss-security/2024/01/01/3"
},
{
"url": "https://www.youtube.com/watch?v=V8KPV96g1To"
},
{
"name": "[debian-lts-announce] 20240105 [SECURITY] [DLA 3708-1] exim4 security update",
"tags": [
"mailing-list"
],
"url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00002.html"
},
{
"name": "FEDORA-2024-1ef6197a49",
"tags": [
"vendor-advisory"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QPDWHJPABVJCXDSNELSSVTIVAJU2MDUQ/"
},
{
"name": "FEDORA-2024-e0841c83bb",
"tags": [
"vendor-advisory"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORN7OKEQPPBKUHYRQ6LR5PSNBQVDHAWB/"
},
{
"url": "https://lwn.net/Articles/956533/"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2023-51766",
"datePublished": "2023-12-24T00:00:00",
"dateReserved": "2023-12-24T00:00:00",
"dateUpdated": "2024-08-02T22:48:11.092Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2023-51766\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2023-12-24T06:15:07.673\",\"lastModified\":\"2024-11-21T08:38:45.183\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Exim supports \u003cLF\u003e.\u003cCR\u003e\u003cLF\u003e but some other popular e-mail servers do not.\"},{\"lang\":\"es\",\"value\":\"Exim hasta 4.97 permite el contrabando SMTP en ciertas configuraciones. Los atacantes remotos pueden utilizar una t\u00e9cnica de explotaci\u00f3n publicada para inyectar mensajes de correo electr\u00f3nico que parecen originarse en el servidor Exim, permitiendo omitir un mecanismo de protecci\u00f3n SPF. Esto ocurre porque Exim admite . pero algunos otros servidores de correo electr\u00f3nico populares no lo hacen.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-345\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"4.97.1\",\"matchCriteriaId\":\"95F6F151-E57F-4DB2-9CCD-3336B887A07B\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:7.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"3D9C7598-4BB4-442A-86DF-EEDE041A4CC7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:8.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"BB176AC3-3CDA-4DDA-9089-C67B2F73AA62\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:9.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"3C30C1AC-01E4-4D7C-B03A-8EEEF3FC8C2F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"CC559B26-5DFC-4B7A-A27C-B77DE755DFF9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8EDB836-4E6A-4B71-B9B2-AA3E03E0F646\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}],\"references\":[{\"url\":\"http://www.openwall.com/lists/oss-security/2023/12/24/1\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2023/12/25/1\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2023/12/29/2\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Mitigation\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/01/01/1\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/01/01/2\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/01/01/3\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://bugs.exim.org/show_bug.cgi?id=3063\",\"source\":\"cve@mitre.org\",\"tags\":[\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2255852\",\"source\":\"cve@mitre.org\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://exim.org/static/doc/security/CVE-2023-51766.txt\",\"source\":\"cve@mitre.org\",\"tags\":[\"Broken Link\"]},{\"url\":\"https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Technical Description\"]},{\"url\":\"https://git.exim.org/exim.git/commit/5bb786d5ad568a88d50d15452aacc8404047e5ca\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.exim.org/exim.git/commit/cf1376206284f2a4f11e32d931d4aade34c206c5\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/Exim/exim/blob/master/doc/doc-txt/cve-2023-51766\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mitigation\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/01/msg00002.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORN7OKEQPPBKUHYRQ6LR5PSNBQVDHAWB/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QPDWHJPABVJCXDSNELSSVTIVAJU2MDUQ/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lwn.net/Articles/956533/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Technical Description\",\"Third Party Advisory\"]},{\"url\":\"https://www.openwall.com/lists/oss-security/2023/12/23/2\",\"source\":\"cve@mitre.org\",\"tags\":[\"Issue Tracking\",\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://www.youtube.com/watch?v=V8KPV96g1To\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2023/12/24/1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2023/12/25/1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2023/12/29/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Mitigation\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/01/01/1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/01/01/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/01/01/3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://bugs.exim.org/show_bug.cgi?id=3063\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2255852\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://exim.org/static/doc/security/CVE-2023-51766.txt\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Broken Link\"]},{\"url\":\"https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Technical Description\"]},{\"url\":\"https://git.exim.org/exim.git/commit/5bb786d5ad568a88d50d15452aacc8404047e5ca\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.exim.org/exim.git/commit/cf1376206284f2a4f11e32d931d4aade34c206c5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/Exim/exim/blob/master/doc/doc-txt/cve-2023-51766\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mitigation\",\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/01/msg00002.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORN7OKEQPPBKUHYRQ6LR5PSNBQVDHAWB/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QPDWHJPABVJCXDSNELSSVTIVAJU2MDUQ/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lwn.net/Articles/956533/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Technical Description\",\"Third Party Advisory\"]},{\"url\":\"https://www.openwall.com/lists/oss-security/2023/12/23/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://www.youtube.com/watch?v=V8KPV96g1To\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\"]}]}}"
}
}
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.