Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

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.

Published

2020-02-25T17:15:13.197

Last Modified

2024-11-21T05:39:27.113

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

10.0

Weaknesses

Type: Primary
CWE-125

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	opensmtpd	opensmtpd	< 6.6.4	Yes
Operating System	canonical	ubuntu_linux	18.04	Yes
Operating System	canonical	ubuntu_linux	19.10	Yes
Operating System	fedoraproject	fedora	31	Yes
Operating System	fedoraproject	fedora	32	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	debian	debian_linux	10.0	Yes

References

http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry ([email protected])
http://seclists.org/fulldisclosure/2020/Feb/32 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2020/02/26/1 Exploit, Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2020/03/01/1 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2020/03/01/2 Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2021/05/04/7 Exploit, Mailing List, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ ([email protected])
https://usn.ubuntu.com/4294-1/ Patch, Third Party Advisory ([email protected])
https://www.debian.org/security/2020/dsa-4634 Third Party Advisory ([email protected])
https://www.openbsd.org/security.html Third Party Advisory ([email protected])
https://www.openwall.com/lists/oss-security/2020/02/24/5 Exploit, Mailing List, Third Party Advisory ([email protected])
http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://seclists.org/fulldisclosure/2020/Feb/32 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2020/02/26/1 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2020/03/01/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2020/03/01/2 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2021/05/04/7 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/ (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/4294-1/ Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2020/dsa-4634 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openbsd.org/security.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.openwall.com/lists/oss-security/2020/02/24/5 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)