Vulnerability identifier: #VU8057
Vulnerability risk: Medium
CVSSv3.1: 7.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
RubyGems
Universal components / Libraries /
Libraries used by multiple products
Vendor: Ruby
Description
The vulnerability allows a remote attacker to overwrite arbitrary files on the target system.
The weakness exists due to insufficient validation of user-supplied input. A remote attacker can trick the victim into installing a specially crafted RubyGem and overwrite arbitrary files.
Mitigation
Update to version 2.6.13.
Vulnerable software versions
RubyGems: 2.2.0 - 2.4.1
External links
http://www.ruby-lang.org/en/news/2017/08/29/multiple-vulnerabilities-in-rubygems/
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user 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.