critical9.8Public exploit code
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.
Public exploit code
Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.
- OpenSMTPD - OOB Read Local Privilege Escalation (Metasploit)2020-03-09 · local · linux · Verified
- OpenSMTPD < 6.6.3p1 - Local Privilege Escalation + Remote Code Execution2020-02-26 · remote · openbsd
Impact
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 products
| Vendor | Product | Affected versions |
|---|---|---|
| Opensmtpd | Opensmtpd | before 6.6.4 |
| Canonical | Ubuntu Linux | Versions 18.04, 19.10 |
| Fedoraproject | Fedora | Versions 31, 32 |
| Debian | Debian Linux | Versions 9.0, 10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html
- http://seclists.org/fulldisclosure/2020/Feb/32
- http://www.openwall.com/lists/oss-security/2020/02/26/1
- http://www.openwall.com/lists/oss-security/2020/03/01/1
- http://www.openwall.com/lists/oss-security/2020/03/01/2
- http://www.openwall.com/lists/oss-security/2021/05/04/7
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
- https://usn.ubuntu.com/4294-1/
- https://www.debian.org/security/2020/dsa-4634
- https://www.openbsd.org/security.html
- https://www.openwall.com/lists/oss-security/2020/02/24/5
- http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html
- http://seclists.org/fulldisclosure/2020/Feb/32
- http://www.openwall.com/lists/oss-security/2020/02/26/1
- http://www.openwall.com/lists/oss-security/2020/03/01/1
- http://www.openwall.com/lists/oss-security/2020/03/01/2
- http://www.openwall.com/lists/oss-security/2021/05/04/7
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
- https://usn.ubuntu.com/4294-1/
- https://www.debian.org/security/2020/dsa-4634
- https://www.openbsd.org/security.html
- https://www.openwall.com/lists/oss-security/2020/02/24/5