// For flags

CVE-2023-51747

SMTP smuggling in Apache James

Severity Score

7.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

Apache James prior to versions 3.8.1 and 3.7.5 is vulnerable to SMTP smuggling.

A lenient behaviour in line delimiter handling might create a difference of interpretation between the sender and the receiver which can be exploited by an attacker to forge an SMTP envelop, allowing for instance to bypass SPF checks.

The patch implies enforcement of CRLF as a line delimiter as part of the DATA transaction.

We recommend James users to upgrade to non vulnerable versions.

Apache James anterior a las versiones 3.8.1 y 3.7.5 es vulnerable al contrabando SMTP. Un comportamiento indulgente en el manejo del delimitador de línea podría crear una diferencia de interpretación entre el remitente y el receptor que un atacante puede aprovechar para falsificar un sobre SMTP, permitiendo, por ejemplo, eludir las comprobaciones SPF. El parche implica la aplicación de CRLF como delimitador de línea como parte de la transacción de DATOS. Recomendamos a los usuarios de James que actualicen a versiones no vulnerables.

*Credits: Benoit TELLIER
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-12-22 CVE Reserved
  • 2024-02-27 CVE Published
  • 2024-02-28 EPSS Updated
  • 2024-11-13 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
  • CWE-290: Authentication Bypass by Spoofing
  • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache Software Foundation
Search vendor "Apache Software Foundation"
 Apache James Server
Search vendor "Apache Software Foundation" for product "Apache James Server"
 <= 3.7.4
Search vendor "Apache Software Foundation" for product "Apache James Server" and version " <= 3.7.4"
en
Affected
Apache Software Foundation
Search vendor "Apache Software Foundation"
 Apache James Server
Search vendor "Apache Software Foundation" for product "Apache James Server"
 3.8.0
Search vendor "Apache Software Foundation" for product "Apache James Server" and version "3.8.0"
en
Affected