Bug 1549192 (CVE-2018-1061) - CVE-2018-1061 python: DOS via regular expression backtracking in difflib.IS_LINE_JUNK method in difflib
Summary: CVE-2018-1061 python: DOS via regular expression backtracking in difflib.IS_L...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-1061
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1563459 1563461 1563462 1563463 1563464 1563465 1563485 1563486 1563487 1563488 1563489 1709355 1709381 1802759 1802760 1802761
Blocks: 1549194
TreeView+ depends on / blocked
 
Reported: 2018-02-26 16:20 UTC by Pedro Sampaio
Modified: 2021-02-17 00:46 UTC (History)
17 users (show)

Fixed In Version: python 2.7.15, python 3.4.9, python 3.5.6, python 3.7.0
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the way catastrophic backtracking was implemented in python's difflib.IS_LINE_JUNK method. An attacker could use this flaw to cause denial of service.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:41:20 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:3041 0 None None None 2018-10-30 07:24:40 UTC
Red Hat Product Errata RHSA-2019:1260 0 None None None 2019-05-22 12:01:50 UTC
Red Hat Product Errata RHSA-2019:3725 0 None None None 2019-11-06 09:45:11 UTC
Red Hat Product Errata RHSA-2020:1268 0 None None None 2020-04-01 08:33:57 UTC
Red Hat Product Errata RHSA-2020:1346 0 None None None 2020-04-07 09:33:27 UTC

Description Pedro Sampaio 2018-02-26 16:20:03 UTC 
Catastrophic backtracking vulnerability was found in Python. Exploitation of a regular expression in difflib.IS_LINE_JUNK method in servers that use difflib can lead to denial of service.

Upstream issue:

https://bugs.python.org/issue32981
Comment 1 Huzaifa S. Sidhpurwala 2018-04-04 01:42:43 UTC 
Created python3 tracking bugs for this issue:

Affects: fedora-all [bug 1563462]


Created python26 tracking bugs for this issue:

Affects: fedora-all [bug 1563464]


Created python33 tracking bugs for this issue:

Affects: fedora-all [bug 1563465]


Created python34 tracking bugs for this issue:

Affects: fedora-all [bug 1563463]


Created python35 tracking bugs for this issue:

Affects: fedora-all [bug 1563461]
Comment 2 Huzaifa S. Sidhpurwala 2018-04-04 01:56:23 UTC 
External References:

https://docs.python.org/3.6/whatsnew/changelog.html#python-3-6-5-final
Comment 4 Huzaifa S. Sidhpurwala 2018-04-04 02:22:31 UTC 
Acknowledgments:

Name: the Python security response team
Comment 5 errata-xmlrpc 2018-10-30 07:24:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3041 https://access.redhat.com/errata/RHSA-2018:3041
Comment 6 errata-xmlrpc 2019-05-22 12:01:49 UTC 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS

Via RHSA-2019:1260 https://access.redhat.com/errata/RHSA-2019:1260
Comment 7 errata-xmlrpc 2019-11-06 09:45:09 UTC 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 6

Via RHSA-2019:3725 https://access.redhat.com/errata/RHSA-2019:3725
Comment 9 errata-xmlrpc 2020-04-01 08:33:52 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.5 Extended Update Support

Via RHSA-2020:1268 https://access.redhat.com/errata/RHSA-2020:1268
Comment 10 errata-xmlrpc 2020-04-07 09:33:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.4 Advanced Update Support
  Red Hat Enterprise Linux 7.4 Telco Extended Update Support
  Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions

Via RHSA-2020:1346 https://access.redhat.com/errata/RHSA-2020:1346
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