Remote code execution in Bundler

1) Insecure installation

EUVDB-ID: #VU658

Risk: Medium

CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-0334

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to logic error within Bundler installation process, when handling gemfiles with multiple top-level sources. The application dies not control the installation source and may allow installing gem file from a different server from the list, if the server in question contains the gem file with the same name.

The attack could be launched using malicious gem file on a public repository, such as gems.github.com. A remote attacker can create a malicious gem file, which will be fetched and executed during installation.

Successful exploitation of the vulnerability may result in compromise of vulnerable system.

Mitigation

Update to Bundler 1.7.

Vulnerable software versions

bundler: 0.3.0 - 1.6.9

External links

http://bundler.io/blog/2014/08/14/bundler-may-install-gems-from-a-different-source-than-expected-cve...

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.