Paper/Archive/CVE-2020-8794

CVE-2020-8794

mitre — 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.

EPSS 89%CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (NVD)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 99.8.998 × 2020.0 No public exploit+100.0 SSVC exploitation: unknown+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

n/an/a–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refopenbsd.org/security.html refopenwall.com/lists/oss-security/2020/02/24/5 refopenwall.com/lists/oss-security/2020/02/26/1 advisorydebian.org/security/2020/dsa-4634 refseclists.org/fulldisclosure/2020/Feb/32 refopenwall.com/lists/oss-security/2020/03/01/1 refopenwall.com/lists/oss-security/2020/03/01/2 refpacketstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html advisorylists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E advisoryusn.ubuntu.com/4294-1 refopenwall.com/lists/oss-security/2021/05/04/7