National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-16944 Detail

Current Description

The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via vectors involving BDAT commands and an improper check for a '.' character signifying the end of the content, related to the bdat_getc function.

Source:  MITRE      Last Modified:  11/25/2017      View Analysis Description

Quick Info

CVE Dictionary Entry:
CVE-2017-16944
Original release date:
11/25/2017
Last revised:
12/07/2017
Source:
US-CERT/NIST

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score:
7.5 High
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (legend)
Impact Score:
3.6
Exploitability Score:
3.9
CVSS Version 3 Metrics:
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High
CVSS Severity (version 2.0):
CVSS v2 Base Score:
5.0 MEDIUM
Vector:
(AV:N/AC:L/Au:N/C:N/I:N/A:P) (legend)
Impact Subscore:
2.9
Exploitability Subscore:
10.0
CVSS Version 2 Metrics:
Access Vector:
Network exploitable
Access Complexity:
Low
Authentication:
Not required to exploit
Impact Type:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name
http://openwall.com/lists/oss-security/2017/11/25/1 Mailing List External Source MISC http://openwall.com/lists/oss-security/2017/11/25/1
http://openwall.com/lists/oss-security/2017/11/25/2 Mailing List External Source MISC http://openwall.com/lists/oss-security/2017/11/25/2
http://openwall.com/lists/oss-security/2017/11/25/3 Mailing List External Source MISC http://openwall.com/lists/oss-security/2017/11/25/3
http://www.securitytracker.com/id/1039873 Third Party Advisory; VDB Entry External Source SECTRACK 1039873
https://bugs.exim.org/show_bug.cgi?id=2201 Exploit; Issue Tracking External Source MISC https://bugs.exim.org/show_bug.cgi?id=2201
https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html Mailing List External Source MISC https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html
https://www.debian.org/security/2017/dsa-4053 Third Party Advisory External Source DEBIAN DSA-4053
https://www.exploit-db.com/exploits/43184/ Third Party Advisory; VDB Entry External Source EXPLOIT-DB 43184

Technical Details

Vulnerability Type (View All)

  • Uncontrolled Resource Consumption ('Resource Exhaustion') (CWE-400)

Change History 6 change records found - show changes