Security update for Bundler in Gentoo Linux

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 dev-ruby/bundler package to version 1.7.3

https://security.gentoo.org/glsa/201609-02

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.