CVE-2020-8794

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.

CVSS Metrics

Affected Products (7)

GitHub Security Advisory GHSA-hmw3-c3g9-px9f

OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in...

References (22)

• 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/
• 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