CVE-2020-15598

DISPUTED Trustwave ModSecurity 3.x through 3.0.4 allows denial of
service via a special request. NOTE: The discoverer reports “Trustwave has
signaled they are disputing our claims.” The CVE suggests that there is a
security issue with how ModSecurity handles regular expressions that can
result in a Denial of Service condition. The vendor does not consider this
as a security issue because1) there is no default configuration issue here.
An attacker would need to know that a rule using a potentially problematic
regular expression was in place, 2) the attacker would need to know the
basic nature of the regular expression itself to exploit any resource
issues. It’s well known that regular expression usage can be taxing on
system resources regardless of the use case. It is up to the administrator
to decide on when it is appropriate to trade resources for potential
security benefit.

Notes