Bug 1549191 – CVE-2018-1060 python: DOS via regular expression catastrophic backtracking in apop() method in pop3lib

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Bug 1549191 - (CVE-2018-1060) CVE-2018-1060 python: DOS via regular expression catastrophic backtracking in apop() method in pop3lib

Summary:	CVE-2018-1060 python: DOS via regular expression catastrophic backtracking in...

Status:	NEW

Aliases:	CVE-2018-1060

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20180314,reported=2...
Keywords:	Security

Depends On:	1563450 1563451 1563452 1563461 1563464 1563465 1563449 1563453 1563454 1563462 1563463
Blocks:	1549194
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Reported:	2018-02-26 11:19 EST by Pedro Sampaio
Modified:	2018-10-30 03:24 EDT (History)
CC List:	18 users (show)

See Also:
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 pop3lib's apop() method. An attacker could use this flaw to cause denial of service.
Story Points:	---
Clone Of:
Environment:
Last Closed:
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:3041	None	None	None	2018-10-30 03:24 EDT

Groups: None (edit)

Description Pedro Sampaio 2018-02-26 11:19:47 EST

Catastrophic backtracking vulnerability was found in Python. Exploitation of a regular expression in pop3lib's apop() method although limited by 2048 chars, can lead to denial of service.

Upstream issue:

https://bugs.python.org/issue32981

Comment 2 Huzaifa S. Sidhpurwala 2018-04-03 21:49:52 EDT

External References:

https://docs.python.org/3.6/whatsnew/changelog.html#python-3-6-5-final

Comment 3 Huzaifa S. Sidhpurwala 2018-04-03 22:01:13 EDT

Created python33 tracking bugs for this issue:

Affects: fedora-all [bug 1563465]


Created python35 tracking bugs for this issue:

Affects: fedora-all [bug 1563461]


Created python34 tracking bugs for this issue:

Affects: fedora-all [bug 1563463]


Created python26 tracking bugs for this issue:

Affects: fedora-all [bug 1563464]


Created python3 tracking bugs for this issue:

Affects: fedora-all [bug 1563462]

Comment 4 Huzaifa S. Sidhpurwala 2018-04-03 22:23:51 EDT

Acknowledgments:

Name: the Python security response team

Comment 5 errata-xmlrpc 2018-10-30 03:24:31 EDT

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

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