#VU32623 Cryptographic issues in Samba - CVE-2013-4476

Vulnerability identifier: #VU32623

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2013-4476

CWE-ID: CWE-310

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Samba
Server applications / Directory software, identity management

Vendor: Samba

Description

The vulnerability allows a local non-authenticated attacker to gain access to sensitive information.

Samba 4.0.x before 4.0.11 and 4.1.x before 4.1.1, when LDAP or HTTP is provided over SSL, uses world-readable permissions for a private key, which allows local users to obtain sensitive information by reading the key file, as demonstrated by access to the local filesystem on an AD domain controller.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Samba: 4.0.0 - 4.0.10

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External links
https://lists.opensuse.org/opensuse-updates/2013-11/msg00083.html
https://lists.opensuse.org/opensuse-updates/2013-12/msg00088.html
https://security.gentoo.org/glsa/glsa-201502-15.xml
https://www.samba.org/samba/history/samba-4.0.11.html
https://www.samba.org/samba/history/samba-4.1.1.html
https://www.samba.org/samba/security/CVE-2013-4476

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.