Vulnerability Monitor

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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.

Published

2017-11-25T17:29:00.307

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 7.5 (HIGH)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-835

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	exim	exim	4.88	Yes
Application	exim	exim	4.89	Yes
Operating System	debian	debian_linux	9.0	Yes

References

http://openwall.com/lists/oss-security/2017/11/25/1 Mailing List ([email protected])
http://openwall.com/lists/oss-security/2017/11/25/2 Mailing List ([email protected])
http://openwall.com/lists/oss-security/2017/11/25/3 Mailing List ([email protected])
http://www.openwall.com/lists/oss-security/2021/05/04/7 ([email protected])
http://www.securitytracker.com/id/1039873 Third Party Advisory, VDB Entry ([email protected])
https://bugs.exim.org/show_bug.cgi?id=2201 Exploit, Issue Tracking ([email protected])
https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html Mailing List ([email protected])
https://www.debian.org/security/2017/dsa-4053 Third Party Advisory ([email protected])
https://www.exploit-db.com/exploits/43184/ Third Party Advisory, VDB Entry ([email protected])
http://openwall.com/lists/oss-security/2017/11/25/1 Mailing List (af854a3a-2127-422b-91ae-364da2661108)
http://openwall.com/lists/oss-security/2017/11/25/2 Mailing List (af854a3a-2127-422b-91ae-364da2661108)
http://openwall.com/lists/oss-security/2017/11/25/3 Mailing List (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2021/05/04/7 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1039873 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://bugs.exim.org/show_bug.cgi?id=2201 Exploit, Issue Tracking (af854a3a-2127-422b-91ae-364da2661108)
https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html Mailing List (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2017/dsa-4053 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.exploit-db.com/exploits/43184/ Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)