Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2020-8162 |
CWE-ID | CWE-20 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software |
activestorage Web applications / Modules and components for CMS |
Vendor | Ruby |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU28240
Risk: Medium
CVSSv4.0: 2.7 [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/E:U/U:Green]
CVE-ID: CVE-2020-8162
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in ActiveStorage's S3 adapter. A remote attacker can control the Content-Length of an S3 direct upload URL without receiving a new signature from the server and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsactivestorage: 5.2.0.beta1 - 6.0.3 rc1
CPE2.3https://snyk.io/vuln/SNYK-RUBY-ACTIVESTORAGE-569602
https://github.com/rails/rails/commit/c0ab9a7d29b84a6ccb1ffa3e8ca1ce61f7a9fbb8
https://groups.google.com/forum/#!topic/rubyonrails-security/PjU3946mreQ
https://hackerone.com/reports/789579
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.