CVE-2017-16943

Current 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.

Basic Data

PublishedNovember 25, 2017
Last ModifiedAugust 02, 2019
Assignercve@mitre.org
Data TypeCVE
Data FormatMITRE
Data Version4.0
Problem TypeCWE-416
CVE Data Version4.0

Base Metric V2

CVSS 2 - Version2.0
CVSS 2 - Vector StringAV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS 2 - Access VectorNETWORK
CVSS 2 - Access ComplexityLOW
CVSS 2 - AuthenticationNONE
CVSS 2 - Confidentiality ImpactPARTIAL
CVSS 2 - Availability ImpactPARTIAL
CVSS 2 - Base Score7.5
SeverityHIGH
Exploitability Score10.0
Impact Score6.4
Obtain All Privilegefalse
Obtain User Privilegefalse
Obtain Other Privilegefalse

Base Metric V3

CVSS 3 - Version3.0
CVSS 3 - Vector StringCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3 - Attack VectorNETWORK
CVSS 3 - Attack ComplexityLOW
CVSS 3 - Privileges RequiredNONE
CVSS 3 - User InteractionNONE
CVSS 3 - ScopeUNCHANGED
CVSS 3 - Confidentiality ImpactHIGH
CVSS 3 - Integrity ImpactHIGH
CVSS 3 - Availability ImpactHIGH
CVSS 3 - Base Score9.8
CVSS 3 - Base SeverityCRITICAL
Exploitability Score3.9
Base SeverityCRITICAL

Configurations

  • OR - Configuration 1
    Cpe VersionPartVendorProductVersionUpdateEditionLanguageSW EditionTarget SWTarget HWOtherVersion Start IncludingVersion End IncludingVersion Start ExcludingVersion End Excluding
    2.3ApplicationEximExim4.88-******
    2.3ApplicationEximExim4.89-******
  • OR - Configuration 2
    Cpe VersionPartVendorProductVersionUpdateEditionLanguageSW EditionTarget SWTarget HWOtherVersion Start IncludingVersion End IncludingVersion Start ExcludingVersion End Excluding
    2.3OSDebianDebian Linux9.0*******

Vulnerable Software List

VendorProductVersions
Debian Debian Linux 9.0
Exim Exim 4.88, 4.89

References

NameSourceURLTags
http://openwall.com/lists/oss-security/2017/11/25/1http://openwall.com/lists/oss-security/2017/11/25/1MISCMailing List
http://openwall.com/lists/oss-security/2017/11/25/2http://openwall.com/lists/oss-security/2017/11/25/2MISCMailing List
http://openwall.com/lists/oss-security/2017/11/25/3http://openwall.com/lists/oss-security/2017/11/25/3MISCMailing List
1039872http://www.securitytracker.com/id/1039872SECTRACKThird Party Advisory VDB Entry
https://bugs.exim.org/show_bug.cgi?id=2199https://bugs.exim.org/show_bug.cgi?id=2199MISCExploit Issue Tracking
https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bdehttps://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bdeMISCPatch
https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4MISCPatch
https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944MISCExploit
https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.htmlhttps://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.htmlMISCMailing List
DSA-4053https://www.debian.org/security/2017/dsa-4053DEBIANThird Party Advisory