Critical severity9.8NVD Advisory· Published Feb 25, 2020· Updated Jun 17, 2026
CVE-2020-8794
CVE-2020-8794
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
9cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*+ 1 more
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- OpenSMTPD/OpenSMTPDdescription
Patches
Vulnerability mechanics
References
11- usn.ubuntu.com/4294-1/nvdPatchThird Party Advisory
- packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.htmlnvdExploitThird Party AdvisoryVDB Entry
- www.openwall.com/lists/oss-security/2020/02/26/1nvdExploitMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2021/05/04/7nvdExploitMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2020/02/24/5nvdExploitMailing ListThird Party Advisory
- seclists.org/fulldisclosure/2020/Feb/32nvdMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2020/03/01/1nvdMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2020/03/01/2nvdMailing ListThird Party Advisory
- www.debian.org/security/2020/dsa-4634nvdThird Party Advisory
- www.openbsd.org/security.htmlnvdThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/nvd
News mentions
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