CVE-2018-1061

high

Description

python before versions 2.7.15, 3.4.9, 3.5.6rc1, 3.6.5rc1 and 3.7.0 is vulnerable to catastrophic backtracking in the difflib.IS_LINE_JUNK method. An attacker could use this flaw to cause denial of service.

References

http://www.securitytracker.com/id/1042001

https://access.redhat.com/errata/RHBA-2019:0327

https://access.redhat.com/errata/RHSA-2018:3041

https://access.redhat.com/errata/RHSA-2018:3505

https://access.redhat.com/errata/RHSA-2019:1260

https://bugs.python.org/issue32981

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1061

https://docs.python.org/3.5/whatsnew/changelog.html#python-3-5-6-release-candidate-1

https://docs.python.org/3.6/whatsnew/changelog.html#python-3-6-5-release-candidate-1

https://lists.debian.org/debian-lts-announce/2018/09/msg00030.html

https://lists.debian.org/debian-lts-announce/2018/09/msg00031.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/46PVWY5LFP4BRPG3BVQ5QEEFYBVEXHCK/

https://lists.fedoraproject.org/archives/list/[email protected]/message/AEZ5IQT7OF7Q2NCGIVABOWYGKO7YU3NJ/

https://lists.fedoraproject.org/archives/list/[email protected]/message/JSKPGPZQNTAULHW4UH63KGOOUIDE4RRB/

https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03951en_us

https://usn.ubuntu.com/3817-1/

https://usn.ubuntu.com/3817-2/

https://www.debian.org/security/2018/dsa-4306

https://www.debian.org/security/2018/dsa-4307

Details

Source: MITRE

Published: 2018-06-19

Updated: 2019-10-03

Risk Information

CVSS v2

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH