Input validation error in Symfony - CVE-2020-5255
Published: March 31, 2020
Vulnerability identifier: #VU26478
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-5255
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: SensioLabs
Affected software:
Symfony
Symfony
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to Symfony sets the default Content-Type header based on received Accept header. A remote attacker can pass specially crafted HTTP request and force the application to cache an empty response, leading to denial of service condition.
How to mitigate CVE-2020-5255
Install updates from vendor's website.