#VU41273 Cryptographic issues in Portage - CVE-2013-2100

Vulnerability identifier: #VU41273

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2013-2100

CWE-ID: CWE-310

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Portage
Other software / Other software solutions

Vendor: Gentoo

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The urlopen function in pym/portage/util/_urlopen.py in Gentoo Portage 2.1.12, when using HTTPS, does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and modify binary package lists via a crafted certificate.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Portage: 2.1.12

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External links
https://openwall.com/lists/oss-security/2013/05/15/5
https://openwall.com/lists/oss-security/2013/05/16/3
https://www.securityfocus.com/bid/59878
https://bugs.gentoo.org/show_bug.cgi?id=469888
https://exchange.xforce.ibmcloud.com/vulnerabilities/84315
https://security.gentoo.org/glsa/201507-16

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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.