Home/CVE/Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filenam
CVE

CVE-2024-39929

Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filenam

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.

MEDIUM · CVSS 5.4 EPSS 0.6031
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 2% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-116Improper Encoding or Escaping of Output
▤

Affected Products & Versions

1
exim<= 4.97.1
⚠

Public Exploits & PoCs

1
pocbugs.exim.org · show_bug.cgi?id=3099#c4bugs.exim.org
▣

Scoring & Timeline

5.4
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 Jul 2024 · 03:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

3
usnUSN-6939-1
suse-csafopenSUSE-SU-2024:0218-1
suse-csafopenSUSE-SU-2024:14196-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://git.exim.org/exim.git/commit/1b3209b0577a9327ebb076f3b32b8a159c253f7bPatch
https://git.exim.org/exim.git/commit/6ce5c70cff8989418e05d01fd2a57703007a6357Patch
https://github.com/Exim/exim/compare/exim-4.98-RC2...exim-4.98-RC3Release Notes
https://www.rfc-editor.org/rfc/rfc2231.txtNot Applicable
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