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Red Hat: RHSA-2019-2136-01 Moderate: libssh2 Out-Of-Bounds Issue

red hat
Calendar Grey August 6, 2019
Dist Redhat Esm H88
Cautious security notice for libssh2 on Red Hat includes patches addressing out-of-bounds read vulnerabilities alongside improvements.
An update for libssh2 is now available for Red Hat Enterprise Linux 7

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.
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.

Topics%20covered

Topics Covered

security advisory moderate security issue Red Hat bug fix libssh2

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

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:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

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 impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate security issue Red Hat bug fix libssh2

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

Bugs Fixed

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

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