Deserialization of Untrusted Data in activesupport toolkit
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-8165 |
| CWE-ID | CWE-502 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
activesupport Operating systems & Components / Operating system package or component |
| Vendor | Ruby |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Deserialization of Untrusted Data
EUVDB-ID: #VU28239
Risk: High
CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2020-8165
CWE-ID:
CWE-502 - Deserialization of Untrusted Data
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data in the "MemCacheStore" and "RedisCacheStore". A remote attacker can pass specially crafted data to the application using the "raw: true" parameter and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsactivesupport: 5.0.0 - 6.0.3.rc1
External linkshttp://snyk.io/vuln/SNYK-RUBY-ACTIVESUPPORT-569598
http://github.com/rails/rails/commit/9b4aef4be3dc58eb08f694387857b52be8050954
http://groups.google.com/forum/#!topic/rubyonrails-security/bv6fW4S0Y1c
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. However, proof of concept for this vulnerability is available.
