CVE-2018-7537
MEDIUM severity · CVSS 5.3 · CWE-185
5.3CVSS MEDIUM
Summary
An issue was discovered in Django 2.0 before 2.0.3, 1.11 before 1.11.11, and 1.8 before 1.8.19. If django.utils.text.Truncator's chars() and words() methods were passed the html=True argument, they were extremely slow to evaluate certain inputs due to a catastrophic backtracking vulnerability in a regular expression. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which were thus vulnerable.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactLow
Exploit probability (EPSS)5%
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.djangoproject.com/weblog/2018/mar/06/security-releases/Advisory
- http://www.securityfocus.com/bid/103357Advisory
- https://access.redhat.com/errata/RHSA-2018:2927Advisory
- https://access.redhat.com/errata/RHSA-2019:0265Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00006.htmlAdvisory
- https://usn.ubuntu.com/3591-1/Advisory
- https://www.debian.org/security/2018/dsa-4161Advisory