—–BEGIN PGP SIGNED MESSAGE—–
Hash: SHA256

=====================================================================
Red Hat Security Advisory

Synopsis: Important: libssh2 security update
Advisory ID: RHSA-2019:1791-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:1791
Issue date: 2019-07-16
CVE Names: CVE-2019-3855 CVE-2019-3856 CVE-2019-3857
CVE-2019-3863
=====================================================================

1. Summary:

An update for libssh2 is now available for Red Hat Enterprise Linux 7.5
Extended Update Support.

Red Hat Product Security has rated this update as having a security impact
of Important. 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 ComputeNode EUS (v. 7.5) – x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) – noarch, x86_64
Red Hat Enterprise Linux Server EUS (v. 7.5) – ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.5) – noarch, ppc64, ppc64le, s390x, x86_64

3. Description:

The libssh2 packages provide a library that implements the SSH2 protocol.

Security Fix(es):

* libssh2: Integer overflow in transport read resulting in out of bounds
write (CVE-2019-3855)

* libssh2: Integer overflow in keyboard interactive handling resulting in
out of bounds write (CVE-2019-3856)

* libssh2: Integer overflow in SSH packet processing channel resulting in
out of bounds write (CVE-2019-3857)

* libssh2: Integer overflow in user authenticate keyboard interactive
allows out-of-bounds writes (CVE-2019-3863)

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.

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/):

1687303 – CVE-2019-3855 libssh2: Integer overflow in transport read resulting in out of bounds write
1687304 – CVE-2019-3856 libssh2: Integer overflow in keyboard interactive handling resulting in out of bounds write
1687305 – CVE-2019-3857 libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write
1687313 – CVE-2019-3863 libssh2: Integer overflow in user authenticate keyboard interactive allows out-of-bounds writes

6. Package List:

Red Hat Enterprise Linux ComputeNode EUS (v. 7.5):

Source:
libssh2-1.4.3-11.el7_5.1.src.rpm

x86_64:
libssh2-1.4.3-11.el7_5.1.i686.rpm
libssh2-1.4.3-11.el7_5.1.x86_64.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.i686.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5):

noarch:
libssh2-docs-1.4.3-11.el7_5.1.noarch.rpm

x86_64:
libssh2-debuginfo-1.4.3-11.el7_5.1.i686.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.x86_64.rpm
libssh2-devel-1.4.3-11.el7_5.1.i686.rpm
libssh2-devel-1.4.3-11.el7_5.1.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 7.5):

Source:
libssh2-1.4.3-11.el7_5.1.src.rpm

ppc64:
libssh2-1.4.3-11.el7_5.1.ppc.rpm
libssh2-1.4.3-11.el7_5.1.ppc64.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.ppc.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.ppc64.rpm

ppc64le:
libssh2-1.4.3-11.el7_5.1.ppc64le.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.ppc64le.rpm

s390x:
libssh2-1.4.3-11.el7_5.1.s390.rpm
libssh2-1.4.3-11.el7_5.1.s390x.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.s390.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.s390x.rpm

x86_64:
libssh2-1.4.3-11.el7_5.1.i686.rpm
libssh2-1.4.3-11.el7_5.1.x86_64.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.i686.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.x86_64.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 7.5):

noarch:
libssh2-docs-1.4.3-11.el7_5.1.noarch.rpm

ppc64:
libssh2-debuginfo-1.4.3-11.el7_5.1.ppc.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.ppc64.rpm
libssh2-devel-1.4.3-11.el7_5.1.ppc.rpm
libssh2-devel-1.4.3-11.el7_5.1.ppc64.rpm

ppc64le:
libssh2-debuginfo-1.4.3-11.el7_5.1.ppc64le.rpm
libssh2-devel-1.4.3-11.el7_5.1.ppc64le.rpm

s390x:
libssh2-debuginfo-1.4.3-11.el7_5.1.s390.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.s390x.rpm
libssh2-devel-1.4.3-11.el7_5.1.s390.rpm
libssh2-devel-1.4.3-11.el7_5.1.s390x.rpm

x86_64:
libssh2-debuginfo-1.4.3-11.el7_5.1.i686.rpm
libssh2-debuginfo-1.4.3-11.el7_5.1.x86_64.rpm
libssh2-devel-1.4.3-11.el7_5.1.i686.rpm
libssh2-devel-1.4.3-11.el7_5.1.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-2019-3855
https://access.redhat.com/security/cve/CVE-2019-3856
https://access.redhat.com/security/cve/CVE-2019-3857
https://access.redhat.com/security/cve/CVE-2019-3863
https://access.redhat.com/security/updates/classification/#important

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.
—–BEGIN PGP SIGNATURE—–
Version: GnuPG v1
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=fzbF
—–END PGP SIGNATURE—–

—
RHSA-announce mailing list
RHSA-announce@redhat.com
https://www.redhat.com/mailman/listinfo/rhsa-announce