// For flags

CVE-2024-39929

Debian Security Advisory 5728-1

Severity Score

5.4
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

2
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users.

Exim hasta la versión 4.97.1 analiza erróneamente un nombre de archivo de encabezado RFC 2231 multilínea y, por lo tanto, atacantes remotos pueden eludir un mecanismo de protección de bloqueo de extensión $mime_filename y potencialmente entregar archivos adjuntos ejecutables a los buzones de correo de los usuarios finales.

Phillip Szelat discovered that Exim misparses multiline MIME header filenames. A remote attacker could use this issue to bypass a MIME filename extension-blocking protection mechanism and possibly deliver executable attachments to the mailboxes of end users.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
Poc
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-07-04 CVE Reserved
  • 2024-07-04 CVE Published
  • 2024-07-12 First Exploit
  • 2025-03-18 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-116: Improper Encoding or Escaping of Output
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Exim
Search vendor "Exim"
 Exim
Search vendor "Exim" for product "Exim"
*-
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
*-
Affected
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
*-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
*-
Affected
Opensuse
Search vendor "Opensuse"
 Leap
Search vendor "Opensuse" for product "Leap"
*-
Affected