CVE-2020-8794

60Vexday Risk Score

Patch soon. It has a working public exploit.

ssvc Attendepss 89%

from disclosure to weapon1 days

Published on NVDFeb 25

1st PoC+1d

metasploitFeb 24

exploitation probability

89%top 1% of all CVEs

observed exploitation

nono source reports it

3 public exploit(s)

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

n/a · n/a

public PoCs found — 3✓ VexDay Proof

exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/48185 exploitdbwww.exploit-db.com/exploits/48140unverified cve_referencepacketstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.htmlunverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html http://seclists.org/fulldisclosure/2020/Feb/32 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://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