Out-of-bounds Read The advisory has been revoked - it doesn't affect any version of package opensmtpd (opens in a new tab)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1404-OPENSMTPD-1627951
- published24 Feb 2020
- disclosed25 Feb 2020
Introduced: 24 Feb 2020
CVE-2020-8794 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:14.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream opensmtpd package and not the opensmtpd package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2020-8794
- https://www.debian.org/security/2020/dsa-4634
- https://security-tracker.debian.org/tracker/CVE-2020-8794
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
- http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html
- https://www.openbsd.org/security.html
- http://www.openwall.com/lists/oss-security/2021/05/04/7
- 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://seclists.org/fulldisclosure/2020/Feb/32
- https://usn.ubuntu.com/4294-1/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
- https://www.exploit-db.com/exploits/48140