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Red Hat Enterprise Linux 7.4 RHSA-2019:1943-01 Critical: libssh2 Overflow

red hat
Calendar Grey July 30, 2019
Dist Redhat Esm H88
New version of libssh2 ready for deployment on Red Hat Enterprise 7.4, featuring critical patches for integer overflow vulnerabilities and associated security risks.
An update for libssh2 is now available for Red Hat Enterprise Linux 7.4 Extended Update Support

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.

Summary

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.

Topics%20covered

Topics Covered

security advisory Red Hat Enterprise Linux integer overflow important update libssh2

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

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.4):
Source: libssh2-1.4.3-11.el7_4.1.src.rpm
x86_64: libssh2-1.4.3-11.el7_4.1.i686.rpm libssh2-1.4.3-11.el7_4.1.x86_64.rpm libssh2-debuginfo-1.4.3-11.el7_4.1.i686.rpm libssh2-debuginfo-1.4.3-11.el7_4.1.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4):
noarch: libssh2-docs-1.4.3-11.el7_4.1.noarch.rpm
x86_64: libssh2-debuginfo-1.4.3-11.el7_4.1.i686.rpm libssh2-debuginfo-1.4.3-11.el7_4.1.x86_64.rpm libssh2-devel-1.4.3-11.el7_4.1.i686.rpm libssh2-devel-1.4.3-11.el7_4.1.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.4):
Source: libssh2-1.4.3-11.el7_4.1.src.rpm
ppc64: libssh2-1.4.3-11.el7_4.1.ppc.rpm libssh2-1.4.3-11.el7_4.1.ppc64.rpm libssh2-debuginfo-1.4.3-11.el7_4.1.ppc.rpm libssh2-debuginfo-1.4.3-11.el7_4.1.ppc64.rpm
ppc64le: libssh2-1.4.3-11.el7_4.1.ppc64le.rpm libssh2-debuginfo-1.4.3-11.el7_4.1.ppc64le.rpm
s390x: libssh2-1.4.3-11.el7_4.1.s390.rpm libssh2-1.4.3-11.el7_4.1.s390x.rpm libssh2-debuginfo-1.4.3-11.el7_4.1.s390.rpm libssh2-debuginfo-1.4.3-11.el7_4.1.s390x.rpm
x86_64: libssh2-1.4.3-11.el7_4.1.i686.rpm libssh2-1.4.3-11.el7_4.1.x86_64.rpm libssh2-debuginfo-1.4.3-11.el7_4.1.i686.rpm libssh2-debuginfo-1.4.3-11.el7_4.1.x86_64.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 7.4):
noarch:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2019:1943-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:1943
Issue date: 2019-07-30

Topic

An update for libssh2 is now available for Red Hat Enterprise Linux 7.4Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat Enterprise Linux integer overflow important update libssh2

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) - x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) - noarch, x86_64

Red Hat Enterprise Linux Server EUS (v. 7.4) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.4) - noarch, ppc64, ppc64le, s390x, x86_64

Bugs Fixed

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

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