CVE-2017-16944

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.

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://bugs.exim.org/show_bug.cgi?id=2201	Exploit Issue Tracking
https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html	Mailing List
http://openwall.com/lists/oss-security/2017/11/25/3	Mailing List
http://openwall.com/lists/oss-security/2017/11/25/2	Mailing List
http://openwall.com/lists/oss-security/2017/11/25/1	Mailing List
http://www.securitytracker.com/id/1039873	Third Party Advisory VDB Entry
https://www.exploit-db.com/exploits/43184/	Third Party Advisory VDB Entry
https://www.debian.org/security/2017/dsa-4053	Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/04/7

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:exim:exim:4.88:::::::*
	cpe:2.3:a:exim:exim:4.89:::::::*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Information

Published : 2017-11-25 09:29

Updated : 2021-05-04 11:15

NVD link : CVE-2017-16944

Mitre link : CVE-2017-16944

JSON object : View

CWE

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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Products Affected

debian

debian_linux

exim

exim

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