High severity · published Nov 25, 2017
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…
7.5
CVSS
63.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)63.4% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0 · source: NVD
EX
Exim · Exim
4.88; 4.89 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-16944
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-16944
Mailing List
http://openwall.com/lists/oss-security/2017/11/25/1
Mailing List
http://openwall.com/lists/oss-security/2017/11/25/2
Mailing List
http://openwall.com/lists/oss-security/2017/11/25/3
www.openwall.com
http://www.openwall.com/lists/oss-security/2021/05/04/7
Third Party Advisory
http://www.securitytracker.com/id/1039873
Exploit
https://bugs.exim.org/show_bug.cgi?id=2201
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