CVE-2020-8794

EPSS 88.9%

Vexday Risk Score

60Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Functional exploit

Automatable exploit available (Nuclei/Metasploit).

CVSS —EPSS 88.9%KEV nãoPoC públicaNuclei —Metasploit simPatch referenciado

Lifecycle

24 Feb 2020Metasploit module available

25 Feb 2020Published on NVD

26 Feb 2020Public PoC

Weaponization speed

same dayto first PoC

Weaponized quickly — attackers prioritized this vulnerability. Patch urgently.

Recommendation: Plan a near-term fix — a public PoC already exists.

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

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

⚠ 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