DEBIAN-CVE-2023-51766

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Source
https://security-tracker.debian.org/tracker/CVE-2023-51766
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-51766.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2023-51766
Upstream
Published
2023-12-24T06:15:07.673Z
Modified
2025-11-14T04:06:27.524632Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
[none]
Details

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

Affected packages

Debian:11 / exim4

Package

Name
exim4
Purl
pkg:deb/debian/exim4?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.94.2-7+deb11u2

Affected versions

4.*

4.94.2-7
4.94.2-7+deb11u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / exim4

Package

Name
exim4
Purl
pkg:deb/debian/exim4?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.96-15+deb12u4

Affected versions

4.*

4.96-15
4.96-15+deb12u1
4.96-15+deb12u2
4.96-15+deb12u3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / exim4

Package

Name
exim4
Purl
pkg:deb/debian/exim4?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.97-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / exim4

Package

Name
exim4
Purl
pkg:deb/debian/exim4?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.97-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}