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Red Hat Security Advisory
Synopsis: Critical: python-paramiko security and bug fix update
Advisory ID: RHSA-2018:0591-01
Product: Red Hat Enterprise Linux Extras
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0591
Issue date: 2018-03-26
CVE Names: CVE-2018-7750
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1. Summary:
An update for python-paramiko is now available for Red Hat Enterprise Linux
7 Extras.
Red Hat Product Security has rated this update as having a security impact
of Critical. 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 7 Extras – noarch
3. Description:
The python-paramiko package provides a Python module that implements the
SSH2 protocol for encrypted and authenticated connections to remote
machines. Unlike SSL, the SSH2 protocol does not require hierarchical
certificates signed by a powerful central authority. The protocol also
includes the ability to open arbitrary channels to remote services across
an encrypted tunnel.
Security Fix(es):
* python-paramiko: Authentication bypass in transport.py (CVE-2018-7750)
For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.
Bug Fix(es):
* python-paramiko has been using the python2-pyasn1 package, but did not
depend on it. With new versions of python2-cryptography, python2-pyasn1 was
not getting installed and this caused python-paramiko to malfunction. This
bug was fixed by making python-paramiko depend on python2-pyasn1
explicitly. (BZ#1559133)
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
5. Bugs fixed (https://bugzilla.redhat.com/):
1557130 – CVE-2018-7750 python-paramiko: Authentication bypass in transport.py
1559133 – Missing requirements in python-paramiko
6. Package List:
Red Hat Enterprise Linux 7 Extras:
Source:
python-paramiko-2.1.1-4.el7.src.rpm
noarch:
python-paramiko-2.1.1-4.el7.noarch.rpm
python-paramiko-doc-2.1.1-4.el7.noarch.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-2018-7750
https://access.redhat.com/security/updates/classification/#critical
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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