Out-of-bounds Write

Affecting libssh2 package, versions <1.7.0-1+deb9u1

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Overview

A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.

References

CVSS Score

8.8
high severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    Required
  • Scope
    Unchanged
  • Confidentiality
    High
  • Integrity
    High
  • Availability
    High
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVE
CVE-2019-3863
CWE
CWE-190 CWE-787
Snyk ID
SNYK-DEBIAN9-LIBSSH2-340714
Disclosed
25 Mar, 2019
Published
17 Mar, 2019