CVEvulnerability
CVE-2020-8794
9.8 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2020-02-25
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 10.0 HIGH — AV:N/AC:L/Au:N/C:C/I:C/A:C
- Weaknesses
- CWE-125
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.
Affected configurations
• opensmtpd opensmtpd (< 6.6.4)
• canonical ubuntu linux 18.04
• canonical ubuntu linux 19.10
• fedoraproject fedora 31
• fedoraproject fedora 32
• debian debian linux 9.0
• debian debian linux 10.0
Related
Weakness · CWE (1)
- CWE-125 Out-of-bounds Read weakness
References
- http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2020/Feb/32 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/02/26/1 Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/03/01/1 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/03/01/2 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/04/7 Exploit, Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ lists.fedoraproject.org
- https://usn.ubuntu.com/4294-1/ Patch, Third Party Advisory
- https://www.debian.org/security/2020/dsa-4634 Third Party Advisory
- 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://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2020/Feb/32 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/02/26/1 Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/03/01/1 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/03/01/2 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/04/7 Exploit, Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ lists.fedoraproject.org
- https://usn.ubuntu.com/4294-1/ Patch, Third Party Advisory
- https://www.debian.org/security/2020/dsa-4634 Third Party Advisory
- 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