Explain CVE-2018-1061
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.
Affected Products: python
References: [{'name': 'DSA-4306', 'tags': ['vendor-advisory', 'x_refsource_DEBIAN'], 'url': 'https://www.debian.org/security/2018/dsa-4306'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1061'}, {'name': '1042001', 'tags': ['vdb-entry', 'x_refsource_SECTRACK'], 'url': 'http://www.securitytracker.com/id/1042001'}, {'name': '[debian-lts-announce] 20180926 [SECURITY] [DLA 1520-1] python3.4 security update', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.debian.org/debian-lts-announce/2018/09/msg00031.html'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://bugs.python.org/issue32981'}, {'name': 'USN-3817-2', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'https://usn.ubuntu.com/3817-2/'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://docs.python.org/3.6/whatsnew/changelog.html#python-3-6-5-release-candidate-1'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://docs.python.org/3.5/whatsnew/changelog.html#python-3-5-6-release-candidate-1'}, {'name': 'RHSA-2018:3505', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2018:3505'}, {'name': 'RHSA-2018:3041', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2018:3041'}, {'name': 'DSA-4307', 'tags': ['vendor-advisory', 'x_refsource_DEBIAN'], 'url': 'https://www.debian.org/security/2018/dsa-4307'}, {'name': 'USN-3817-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'https://usn.ubuntu.com/3817-1/'}, {'name': '[debian-lts-announce] 20180925 [SECURITY] [DLA 1519-1] python2.7 security update', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'https://lists.debian.org/debian-lts-announce/2018/09/msg00030.html'}, {'name': 'FEDORA-2019-6e1938a3c5', 'tags': ['vendor-advisory', 'x_refsource_FEDORA'], 'url': 'https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JSKPGPZQNTAULHW4UH63KGOOUIDE4RRB/'}, {'name': 'FEDORA-2019-cf725dd20b', 'tags': ['vendor-advisory', 'x_refsource_FEDORA'], 'url': 'https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AEZ5IQT7OF7Q2NCGIVABOWYGKO7YU3NJ/'}, {'name': 'FEDORA-2019-51f1e08207', 'tags': ['vendor-advisory', 'x_refsource_FEDORA'], 'url': 'https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/46PVWY5LFP4BRPG3BVQ5QEEFYBVEXHCK/'}, {'name': 'RHBA-2019:0327', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHBA-2019:0327'}, {'name': 'RHSA-2019:1260', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:1260'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03951en_us'}, {'name': 'RHSA-2019:3725', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'https://access.redhat.com/errata/RHSA-2019:3725'}, {'name': 'openSUSE-SU-2020:0086', 'tags': ['vendor-advisory', 'x_refsource_SUSE'], 'url': 'http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html'}]
CVE State: PUBLISHED