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Red Hat Enterprise Linux 7: RHSA-2018-2123-01 Moderate Python MITM CVE

red hat
Calendar Grey July 3, 2018
Scroller Redhat
Oracle Linux 8 has launched a python patch to tackle potential vulnerabilities. Important adjustments improve cryptographic defenses.
An update for python 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

Summary

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.
Security Fix(es):
* A flaw was found in the way the DES/3DES cipher was used as part of the TLS/SSL protocol. A man-in-the-middle attacker could use this flaw to recover some plaintext data by capturing large amounts of encrypted traffic between TLS/SSL server and client if the communication used a DES/3DES based ciphersuite. (CVE-2016-2183)
Note: This update modifies the Python ssl module to disable 3DES cipher suites by default.
Red Hat would like to thank OpenVPN for reporting this issue. Upstream acknowledges Karthikeyan Bhargavan (Inria) and Gaëtan Leurent (Inria) as the original reporters.

Topics%20covered

Topics Covered

security advisory Red Hat Enterprise Linux man-in-the-middle python update moderate issue encryption flaw TLS security

References

https://access.redhat.com/security/cve/CVE-2016-2183 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: python-2.7.5-69.el7_5.src.rpm
x86_64: python-2.7.5-69.el7_5.x86_64.rpm python-debuginfo-2.7.5-69.el7_5.i686.rpm python-debuginfo-2.7.5-69.el7_5.x86_64.rpm python-libs-2.7.5-69.el7_5.i686.rpm python-libs-2.7.5-69.el7_5.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: python-debug-2.7.5-69.el7_5.x86_64.rpm python-debuginfo-2.7.5-69.el7_5.x86_64.rpm python-devel-2.7.5-69.el7_5.x86_64.rpm python-test-2.7.5-69.el7_5.x86_64.rpm python-tools-2.7.5-69.el7_5.x86_64.rpm tkinter-2.7.5-69.el7_5.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: python-2.7.5-69.el7_5.src.rpm
x86_64: python-2.7.5-69.el7_5.x86_64.rpm python-debuginfo-2.7.5-69.el7_5.i686.rpm python-debuginfo-2.7.5-69.el7_5.x86_64.rpm python-devel-2.7.5-69.el7_5.x86_64.rpm python-libs-2.7.5-69.el7_5.i686.rpm python-libs-2.7.5-69.el7_5.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: python-debug-2.7.5-69.el7_5.x86_64.rpm python-debuginfo-2.7.5-69.el7_5.x86_64.rpm python-test-2.7.5-69.el7_5.x86_64.rpm python-tools-2.7.5-69.el7_5.x86_64.rpm tkinter-2.7.5-69.el7_5.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: python-2.7.5-69.el7_5.src.rpm
ppc64: python-2.7.5-69.el7_5.ppc64.rpm python-debuginfo-2.7.5-69.el7_5.ppc.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:2123-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:2123
Issue date: 2018-07-03

Topic

An update for python 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 Red Hat Enterprise Linux man-in-the-middle python update moderate issue encryption flaw TLS security

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, ppc64le, s390x

Bugs Fixed

1369383 - CVE-2016-2183 SSL/TLS: Birthday attack against 64-bit block ciphers (SWEET32)

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