Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2019.2981
libssh2 security, bug fix, and enhancement update
8 August 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libssh2
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Impact/Access: Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-3861 CVE-2019-3858
Reference: ESB-2019.1274
ESB-2019.0996
ESB-2019.0894
Original Bulletin:
https://access.redhat.com/errata/RHSA-2019:2136
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Red Hat Security Advisory
Synopsis: Moderate: libssh2 security, bug fix, and enhancement update
Advisory ID: RHSA-2019:2136-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:2136
Issue date: 2019-08-06
CVE Names: CVE-2019-3858 CVE-2019-3861
=====================================================================
1. Summary:
An update for libssh2 is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - noarch, x86_64
3. Description:
The libssh2 packages provide a library that implements the SSH2 protocol.
The following packages have been upgraded to a later upstream version:
libssh2 (1.8.0). (BZ#1592784)
Security Fix(es):
* libssh2: Zero-byte allocation with a specially crafted SFTP packed
leading to an out-of-bounds read (CVE-2019-3858)
* libssh2: Out-of-bounds reads with specially crafted SSH packets
(CVE-2019-3861)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.7 Release Notes linked from the References section.
4. Solution:
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.
5. Bugs fixed (https://bugzilla.redhat.com/):
1687306 - CVE-2019-3858 libssh2: Zero-byte allocation with a specially crafted SFTP packed leading to an out-of-bounds read
1687311 - CVE-2019-3861 libssh2: Out-of-bounds reads with specially crafted SSH packets
6. Package List:
Red Hat Enterprise Linux Client (v. 7):
Source:
libssh2-1.8.0-3.el7.src.rpm
x86_64:
libssh2-1.8.0-3.el7.i686.rpm
libssh2-1.8.0-3.el7.x86_64.rpm
libssh2-debuginfo-1.8.0-3.el7.i686.rpm
libssh2-debuginfo-1.8.0-3.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
noarch:
libssh2-docs-1.8.0-3.el7.noarch.rpm
x86_64:
libssh2-debuginfo-1.8.0-3.el7.i686.rpm
libssh2-debuginfo-1.8.0-3.el7.x86_64.rpm
libssh2-devel-1.8.0-3.el7.i686.rpm
libssh2-devel-1.8.0-3.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
libssh2-1.8.0-3.el7.src.rpm
x86_64:
libssh2-1.8.0-3.el7.i686.rpm
libssh2-1.8.0-3.el7.x86_64.rpm
libssh2-debuginfo-1.8.0-3.el7.i686.rpm
libssh2-debuginfo-1.8.0-3.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
noarch:
libssh2-docs-1.8.0-3.el7.noarch.rpm
x86_64:
libssh2-debuginfo-1.8.0-3.el7.i686.rpm
libssh2-debuginfo-1.8.0-3.el7.x86_64.rpm
libssh2-devel-1.8.0-3.el7.i686.rpm
libssh2-devel-1.8.0-3.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
libssh2-1.8.0-3.el7.src.rpm
ppc64:
libssh2-1.8.0-3.el7.ppc.rpm
libssh2-1.8.0-3.el7.ppc64.rpm
libssh2-debuginfo-1.8.0-3.el7.ppc.rpm
libssh2-debuginfo-1.8.0-3.el7.ppc64.rpm
ppc64le:
libssh2-1.8.0-3.el7.ppc64le.rpm
libssh2-debuginfo-1.8.0-3.el7.ppc64le.rpm
s390x:
libssh2-1.8.0-3.el7.s390.rpm
libssh2-1.8.0-3.el7.s390x.rpm
libssh2-debuginfo-1.8.0-3.el7.s390.rpm
libssh2-debuginfo-1.8.0-3.el7.s390x.rpm
x86_64:
libssh2-1.8.0-3.el7.i686.rpm
libssh2-1.8.0-3.el7.x86_64.rpm
libssh2-debuginfo-1.8.0-3.el7.i686.rpm
libssh2-debuginfo-1.8.0-3.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
noarch:
libssh2-docs-1.8.0-3.el7.noarch.rpm
ppc64:
libssh2-debuginfo-1.8.0-3.el7.ppc.rpm
libssh2-debuginfo-1.8.0-3.el7.ppc64.rpm
libssh2-devel-1.8.0-3.el7.ppc.rpm
libssh2-devel-1.8.0-3.el7.ppc64.rpm
ppc64le:
libssh2-debuginfo-1.8.0-3.el7.ppc64le.rpm
libssh2-devel-1.8.0-3.el7.ppc64le.rpm
s390x:
libssh2-debuginfo-1.8.0-3.el7.s390.rpm
libssh2-debuginfo-1.8.0-3.el7.s390x.rpm
libssh2-devel-1.8.0-3.el7.s390.rpm
libssh2-devel-1.8.0-3.el7.s390x.rpm
x86_64:
libssh2-debuginfo-1.8.0-3.el7.i686.rpm
libssh2-debuginfo-1.8.0-3.el7.x86_64.rpm
libssh2-devel-1.8.0-3.el7.i686.rpm
libssh2-devel-1.8.0-3.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
libssh2-1.8.0-3.el7.src.rpm
x86_64:
libssh2-1.8.0-3.el7.i686.rpm
libssh2-1.8.0-3.el7.x86_64.rpm
libssh2-debuginfo-1.8.0-3.el7.i686.rpm
libssh2-debuginfo-1.8.0-3.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
noarch:
libssh2-docs-1.8.0-3.el7.noarch.rpm
x86_64:
libssh2-debuginfo-1.8.0-3.el7.i686.rpm
libssh2-debuginfo-1.8.0-3.el7.x86_64.rpm
libssh2-devel-1.8.0-3.el7.i686.rpm
libssh2-devel-1.8.0-3.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2019-3858
https://access.redhat.com/security/cve/CVE-2019-3861
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.7_release_notes/index
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2019 Red Hat, Inc.
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