CVE-2017-16943

high-risk
Published 2017-11-25

The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands.

Do I need to act?

!
76.9% chance of exploitation in next 30 days
EPSS score — higher than 23% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (3)

Affected Vendors

Debian Exim

References (22)

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
http://www.openwall.com/lists/oss-security/2021/05/04/7
Third Party Advisory http://www.securitytracker.com/id/1039872
Exploit https://bugs.exim.org/show_bug.cgi?id=2199
Patch https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde
Patch https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b...
Exploit https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944
Mailing List https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html
Third Party Advisory https://www.debian.org/security/2017/dsa-4053
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
http://www.openwall.com/lists/oss-security/2021/05/04/7
Third Party Advisory http://www.securitytracker.com/id/1039872
Exploit https://bugs.exim.org/show_bug.cgi?id=2199
Patch https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde
Patch https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b...
Exploit https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944
and 2 more references
61
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 20/34 · Moderate
Exposure 9/34 · Low