Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Exim | Exim | 4.88 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- http://openwall.com/lists/oss-security/2017/11/25/1Mailing List
- http://openwall.com/lists/oss-security/2017/11/25/2Mailing List
- http://openwall.com/lists/oss-security/2017/11/25/3Mailing List
- http://www.openwall.com/lists/oss-security/2021/05/04/7
- http://www.securitytracker.com/id/1039872Third Party AdvisoryVDB Entry
- https://bugs.exim.org/show_bug.cgi?id=2199ExploitIssue Tracking
- https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bdePatch
- https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2bPatch
- https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944Exploit
- https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.htmlMailing List
- https://www.debian.org/security/2017/dsa-4053Third Party Advisory
- http://openwall.com/lists/oss-security/2017/11/25/1Mailing List
- http://openwall.com/lists/oss-security/2017/11/25/2Mailing List
- http://openwall.com/lists/oss-security/2017/11/25/3Mailing List
- http://www.openwall.com/lists/oss-security/2021/05/04/7
FAQ
What is CVE-2017-16943?
CVE-2017-16943 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 BDA...
How severe is CVE-2017-16943?
CVE-2017-16943 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2017-16943?
Check the references section above for vendor advisories and patch information. Affected products include: Exim Exim, Debian Debian Linux.