CVE-2020-8794

CVSS V2 High 10 CVSS V3 Critical 9.8
Description
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.
Overview
  • CVE ID
  • CVE-2020-8794
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-02-25T17:15:13
  • Last Modified Date
  • 2022-10-08T02:48:30
Weakness Enumerations
CWE URL
CWE-125 http://cwe.mitre.org/data/definitions/125.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:opensmtpd:opensmtpd:*:*:*:*:*:*:*:* 1 OR 6.6.4
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:C/I:C/A:C
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 10
  • Severity
  • HIGH
  • Exploitability Score
  • 10
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 9.8
  • Base Severity
  • CRITICAL
  • Exploitability Score
  • 3.9
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://www.openbsd.org/security.html Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/02/24/5 Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/02/26/1
https://www.debian.org/security/2020/dsa-4634
http://seclists.org/fulldisclosure/2020/Feb/32
http://www.openwall.com/lists/oss-security/2020/03/01/1
http://www.openwall.com/lists/oss-security/2020/03/01/2
http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
https://usn.ubuntu.com/4294-1/
http://www.openwall.com/lists/oss-security/2021/05/04/7
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-8794
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8794
History
Created Old Value New Value Data Type Notes
2022-05-10 16:17:37 Added to TrackCVE
2022-12-04 11:46:29 2020-02-25T17:15Z 2020-02-25T17:15:13 CVE Published Date updated
2022-12-04 11:46:29 2022-10-08T02:48:30 CVE Modified Date updated
2022-12-04 11:46:29 Analyzed Vulnerability Status updated