Denial of service in Apache Struts - CVE-2017-9804
Published: September 6, 2017
Vulnerability identifier: #VU8114
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-9804
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause DoS condition.
The weakness exists due to server process overload when performing validation of the URL. A remote attacker can supply a specially crafted URL in a form field to trigger an error in regular expression (regex) processin, consume excessive CPU resources and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
The weakness exists due to server process overload when performing validation of the URL. A remote attacker can supply a specially crafted URL in a form field to trigger an error in regular expression (regex) processin, consume excessive CPU resources and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
Affected software
Apache Struts
Cisco Emergency Responder
Cisco Emergency Responder
How to mitigate CVE-2017-9804
The vulnerability is addressed in the following versions: 2.5.13 and 2.3.34.