Resource exhaustion in Rack - CVE-2018-16470
Published: November 19, 2018 / Updated: November 20, 2018
Vulnerability identifier: #VU15971
CSH Severity: Low
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-16470
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to resource exhaustion condition in the multipart parser when processing malicious input. A remote attacker can send a custom request, cause the parser to use an excessive amount of CPU resources and cause the service to crash.
Affected software
Rack
Opensuse
Fedora
rubygem-rack
Opensuse
Fedora
rubygem-rack
How to mitigate CVE-2018-16470
Update to version 2.0.6.
Rack - update to 2.0.6
rubygem-rack - addressed in versions 2.0.4-4.fc28, 2.0.4-4.fc29
rubygem-rack - addressed in versions 2.0.4-4.fc28, 2.0.4-4.fc29