CVE-2017-16944

Current 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.

Basic Data

PublishedNovember 25, 2017
Last ModifiedOctober 03, 2019
Assignercve@mitre.org
Data TypeCVE
Data FormatMITRE
Data Version4.0
Problem TypeCWE-835
CVE Data Version4.0

Base Metric V2

CVSS 2 - Version2.0
CVSS 2 - Vector StringAV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS 2 - Access VectorNETWORK
CVSS 2 - Access ComplexityLOW
CVSS 2 - AuthenticationNONE
CVSS 2 - Confidentiality ImpactNONE
CVSS 2 - Availability ImpactPARTIAL
CVSS 2 - Base Score5.0
SeverityMEDIUM
Exploitability Score10.0
Impact Score2.9
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:N/I:N/A:H
CVSS 3 - Attack VectorNETWORK
CVSS 3 - Attack ComplexityLOW
CVSS 3 - Privileges RequiredNONE
CVSS 3 - User InteractionNONE
CVSS 3 - ScopeUNCHANGED
CVSS 3 - Confidentiality ImpactNONE
CVSS 3 - Integrity ImpactNONE
CVSS 3 - Availability ImpactHIGH
CVSS 3 - Base Score7.5
CVSS 3 - Base SeverityHIGH
Exploitability Score3.9
Base SeverityHIGH

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
1039873http://www.securitytracker.com/id/1039873SECTRACKThird Party Advisory VDB Entry
https://bugs.exim.org/show_bug.cgi?id=2201https://bugs.exim.org/show_bug.cgi?id=2201MISCExploit Issue Tracking
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
43184https://www.exploit-db.com/exploits/43184/EXPLOIT-DBThird Party Advisory VDB Entry