RHSA-2019:1791HighCVSS 7.5

Red Hat Security Advisory: libssh2 security update

Published
July 16, 2019
Last Modified
October 14, 2026

🔗 CVE IDs covered (4)

CVE-2019-3856 →CVE-2019-3857 →CVE-2019-3863 →CVE-2019-3855 →

📋 Description

CVE-2019-3855 — libssh2: Integer overflow in transport read resulting in out of bounds write CVE-2019-3856 — libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write CVE-2019-3857 — libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write CVE-2019-3863 — libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes

🎯 Affected products44

  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.5)
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5)
  • Red Hat Enterprise Linux Server EUS (v. 7.5)
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.5)
  • libssh2-0:1.4.3-11.el7_5.1.i686 as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.5)
  • libssh2-0:1.4.3-11.el7_5.1.i686 as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-0:1.4.3-11.el7_5.1.ppc as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-0:1.4.3-11.el7_5.1.ppc64 as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-0:1.4.3-11.el7_5.1.ppc64le as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-0:1.4.3-11.el7_5.1.s390 as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-0:1.4.3-11.el7_5.1.s390x as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-0:1.4.3-11.el7_5.1.src as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.5)
  • libssh2-0:1.4.3-11.el7_5.1.src as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-0:1.4.3-11.el7_5.1.x86_64 as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.5)
  • libssh2-0:1.4.3-11.el7_5.1.x86_64 as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.i686 as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.i686 as a component of Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.i686 as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.i686 as a component of Red Hat Enterprise Linux Server Optional EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.ppc as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.ppc as a component of Red Hat Enterprise Linux Server Optional EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.ppc64 as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.ppc64 as a component of Red Hat Enterprise Linux Server Optional EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.ppc64le as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.ppc64le as a component of Red Hat Enterprise Linux Server Optional EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.s390 as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.s390 as a component of Red Hat Enterprise Linux Server Optional EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.s390x as a component of Red Hat Enterprise Linux Server EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.s390x as a component of Red Hat Enterprise Linux Server Optional EUS (v. 7.5)
  • libssh2-debuginfo-0:1.4.3-11.el7_5.1.x86_64 as a component of Red Hat Enterprise Linux ComputeNode EUS (v. 7.5)
  • +14 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing these updated packages, all running applications using libssh2 must be restarted for this update to take effect.

🔗 References (7)