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Red Hat Product Errata RHSA-2018:0591 - Security Advisory
Issued:
2018-03-26
Updated:
2018-03-26

RHSA-2018:0591 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Critical: python-paramiko security and bug fix update

Type/Severity

Security Advisory: Critical

Red Hat Insights patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

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.

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)

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

Affected Products

  • Red Hat Enterprise Linux Server 7 x86_64
  • Red Hat Enterprise Linux for Power, little endian 7 ppc64le
  • Red Hat Enterprise Linux for Power 9 7 ppc64le

Fixes

  • BZ - 1557130 - CVE-2018-7750 python-paramiko: Authentication bypass in transport.py
  • BZ - 1559133 - Missing requirements in python-paramiko

CVEs

  • CVE-2018-7750

References

  • https://access.redhat.com/security/updates/classification/#critical
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat Enterprise Linux Server 7

SRPM
python-paramiko-2.1.1-4.el7.src.rpm SHA-256: 43ba21a7cbfc99918164c9dee8e2c2ece5915b421834a00474d2bfbeb3d748b7
x86_64
python-paramiko-2.1.1-4.el7.noarch.rpm SHA-256: 461375b1b458818f5b5893aefac09fbf39cd651c081e63479915b8ffa33a72cc
python-paramiko-doc-2.1.1-4.el7.noarch.rpm SHA-256: 4abfc94c371f6fb64761ad9616522bfbab10091dc60cc0513f2496b70a883d36

Red Hat Enterprise Linux for Power, little endian 7

SRPM
python-paramiko-2.1.1-4.el7.src.rpm SHA-256: 43ba21a7cbfc99918164c9dee8e2c2ece5915b421834a00474d2bfbeb3d748b7
ppc64le
python-paramiko-2.1.1-4.el7.noarch.rpm SHA-256: 461375b1b458818f5b5893aefac09fbf39cd651c081e63479915b8ffa33a72cc
python-paramiko-doc-2.1.1-4.el7.noarch.rpm SHA-256: 4abfc94c371f6fb64761ad9616522bfbab10091dc60cc0513f2496b70a883d36

Red Hat Enterprise Linux for Power 9 7

SRPM
python-paramiko-2.1.1-4.el7.src.rpm SHA-256: 43ba21a7cbfc99918164c9dee8e2c2ece5915b421834a00474d2bfbeb3d748b7
ppc64le
python-paramiko-2.1.1-4.el7.noarch.rpm SHA-256: 461375b1b458818f5b5893aefac09fbf39cd651c081e63479915b8ffa33a72cc
python-paramiko-doc-2.1.1-4.el7.noarch.rpm SHA-256: 4abfc94c371f6fb64761ad9616522bfbab10091dc60cc0513f2496b70a883d36

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.

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