ISOMAN

CVE

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.

Severity
CRITICAL
CVSS
9.8
Published
Modified
NVD detailAll CVEs

Linked Releases

DistributionReleaseStatusEvidence
Ubuntu18.04.6 amd64 desktopunknownsource
Ubuntu18.04.6 amd64 live-serverunknownsource

References

  1. http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html
  2. http://seclists.org/fulldisclosure/2020/Feb/32
  3. http://www.openwall.com/lists/oss-security/2020/02/26/1
  4. http://www.openwall.com/lists/oss-security/2020/03/01/1
  5. http://www.openwall.com/lists/oss-security/2020/03/01/2
  6. http://www.openwall.com/lists/oss-security/2021/05/04/7
  7. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
  8. https://usn.ubuntu.com/4294-1/
  9. https://www.debian.org/security/2020/dsa-4634
  10. https://www.openbsd.org/security.html
  11. https://www.openwall.com/lists/oss-security/2020/02/24/5
  12. http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html
  13. http://seclists.org/fulldisclosure/2020/Feb/32
  14. http://www.openwall.com/lists/oss-security/2020/02/26/1
  15. http://www.openwall.com/lists/oss-security/2020/03/01/1
  16. http://www.openwall.com/lists/oss-security/2020/03/01/2
  17. http://www.openwall.com/lists/oss-security/2021/05/04/7
  18. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/
  19. https://usn.ubuntu.com/4294-1/
  20. https://www.debian.org/security/2020/dsa-4634