ID CVE-2020-8794
Summary OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.
References
Vulnerable Configurations
  • cpe:2.3:a:opensmtpd:opensmtpd:5.0:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.0:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.0:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.0:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.2.1:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.2.1:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.2.1:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.2.1:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.3:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.3:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.3:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.3:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.3.1:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.3.1:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.3.1:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.3.1:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.3.2:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.3.2:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.3.2:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.3.2:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.3.3:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.3.3:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.3.3:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.3.3:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.4:*:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.4:*:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.4.1:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.4.1:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.4.1:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.4.1:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.4.2:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.4.2:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.4.2:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.4.2:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.4.4:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.4.4:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.4.4:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.4.4:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.4.5:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.4.5:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.4.5:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.4.5:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.4.6:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.4.6:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.4.6:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.4.6:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.4.6-2:*:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.4.6-2:*:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.7.1:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.7.1:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.7.1:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.7.1:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.7.2:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.7.2:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.7.2:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.7.2:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.7.3:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.7.3:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.7.3:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.7.3:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.7.3:p2:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.7.3:p2:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.9.1:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.9.1:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.9.1:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.9.1:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.9.2:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.9.2:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:5.9.2:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:5.9.2:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.0.0:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.0.0:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.0.0:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.0.0:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.0.2:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.0.2:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.0.2:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.0.2:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.0.3:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.0.3:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.0.3:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.0.3:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.4.0:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.4.0:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.4.0:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.4.0:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.4.0:p2:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.4.0:p2:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.4.1:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.4.1:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.4.1:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.4.1:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.4.1:p2:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.4.1:p2:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.4.2:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.4.2:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.4.2:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.4.2:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.6.0:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.6.0:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.6.0:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.6.0:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.6.1:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.6.1:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.6.1:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.6.1:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.6.2:-:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.6.2:-:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.6.2:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.6.2:p1:*:*:*:*:*:*
  • cpe:2.3:a:opensmtpd:opensmtpd:6.6.3:p1:*:*:*:*:*:*
    cpe:2.3:a:opensmtpd:opensmtpd:6.6.3:p1:*:*:*:*:*:*
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
    cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
  • cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
    cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
  • cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
    cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
    cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
    cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
    cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
CVSS
Base: 10.0 (as of 08-10-2022 - 02:48)
Impact:
Exploitability:
CWE CWE-125
CAPEC
  • Infiltration of Hardware Development Environment
    An attacker, leveraging the ability to manipulate components of primary support systems and tools within the development and production environments, inserts malicious software within the hardware and/or firmware development environment. The infiltration purpose is to alter developed hardware components in a system destined for deployment at the victim's organization, for the purpose of disruption or further compromise.
  • Overread Buffers
    An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.
Access
VectorComplexityAuthentication
NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
cvss-vector via4 AV:N/AC:L/Au:N/C:C/I:C/A:C
refmap via4
debian DSA-4634
fedora FEDORA-2020-b92d7083ca
fulldisc 20200227 LPE and RCE in OpenSMTPD's default install (CVE-2020-8794)
misc
mlist
  • [oss-security] 20200226 Re: LPE and RCE in OpenSMTPD's default install (CVE-2020-8794)
  • [oss-security] 20200301 Re: LPE and RCE in OpenSMTPD's default install (CVE-2020-8794)
ubuntu USN-4294-1
Last major update 08-10-2022 - 02:48
Published 25-02-2020 - 17:15
Last modified 08-10-2022 - 02:48
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