Moderate: python security and bug fix update

Related Vulnerabilities: CVE-2018-1061   CVE-2018-1060   CVE-2018-1060   CVE-2018-1061   CVE-2018-1060   CVE-2018-1061  

Synopsis

Moderate: python security and bug fix update

Type/Severity

Security Advisory: Moderate

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 impact of Moderate. 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

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):

  • python: DOS via regular expression backtracking in difflib.IS_LINE_JUNK method in difflib (CVE-2018-1061)
  • python: DOS via regular expression catastrophic backtracking in apop() method in pop3lib (CVE-2018-1060)

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.

Red Hat would like to thank the Python security response team for reporting these issues.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.6 Release Notes linked from the References section.

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 Workstation 7 x86_64
  • Red Hat Enterprise Linux Desktop 7 x86_64
  • Red Hat Enterprise Linux for IBM z Systems 7 s390x
  • Red Hat Enterprise Linux for Power, big endian 7 ppc64
  • Red Hat Enterprise Linux for Scientific Computing 7 x86_64
  • Red Hat Enterprise Linux for Power, little endian 7 ppc64le
  • Red Hat Enterprise Linux for ARM 64 7 aarch64
  • Red Hat Enterprise Linux for Power 9 7 ppc64le
  • Red Hat Enterprise Linux for IBM System z (Structure A) 7 s390x

Fixes

  • BZ - 1549191 - CVE-2018-1060 python: DOS via regular expression catastrophic backtracking in apop() method in pop3lib
  • BZ - 1549192 - CVE-2018-1061 python: DOS via regular expression backtracking in difflib.IS_LINE_JUNK method in difflib
  • BZ - 1555314 - Don't send IP address as SNI TLS extension
  • BZ - 1557460 - python-libs package dosn't provide python2-libs
  • BZ - 1579432 - OSError 17 due to _multiprocessing/semaphore.c assuming a one-to-one Pid -> process mapping.

CVEs

References