CVE-2017-16943
Summary
| CVE | CVE-2017-16943 |
|---|---|
| State | PUBLISHED |
| Assigner | mitre |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2017-11-25 17:29:00 UTC |
| Updated | 2025-04-20 01:37:25 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.0 9.8 CRITICAL from [email protected]
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.769250000 probability, percentile 0.989820000 (date 2026-05-14)
Problem Types: CWE-416 | n/a
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 9.8 | CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 2.0 | [email protected] | Primary | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
NoneConfidentiality
PartialIntegrity
PartialAvailability
PartialAV:N/AC:L/Au:N/C:P/I:P/A:P
NVD Known Affected Configurations (CPE 2.3)
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Bug 2199 – Exim use-after-free vulnerability while reading mail header | af854a3a-2127-422b-91ae-364da2661108 | bugs.exim.org | Exploit, Issue Tracking |
| oss-security - Re: RCE in Exim reported | af854a3a-2127-422b-91ae-364da2661108 | openwall.com | Mailing List |
| [exim-announce] Critical Exim Security Vulnerability: disable chunking | af854a3a-2127-422b-91ae-364da2661108 | lists.exim.org | Mailing List |
| oss-security - 21Nails: Multiple vulnerabilities in Exim | af854a3a-2127-422b-91ae-364da2661108 | www.openwall.com | |
| git.exim.org Git - exim.git/commit | af854a3a-2127-422b-91ae-364da2661108 | git.exim.org | Patch |
| Exim Use-After-Free Memory Error in SMTP Service Lets Remote Users Execute Arbitrary Code on the Target System - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | Third Party Advisory, VDB Entry |
| Debian -- Security Information -- DSA-4053-1 exim4 | af854a3a-2127-422b-91ae-364da2661108 | www.debian.org | Third Party Advisory |
| oss-security - RCE in Exim reported | af854a3a-2127-422b-91ae-364da2661108 | openwall.com | Mailing List |
| PoC-Exploit-Mirror/CVE-2017-16944 at master · LetUsFsck/PoC-Exploit-Mirror · GitHub | af854a3a-2127-422b-91ae-364da2661108 | github.com | Exploit |
| git.exim.org Git - exim.git/commitdiff | af854a3a-2127-422b-91ae-364da2661108 | git.exim.org | Patch |
| oss-security - Re: RCE in Exim reported | af854a3a-2127-422b-91ae-364da2661108 | openwall.com | Mailing List |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.