Debian update for samba



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-16860
CWE-ID CWE-287
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 samba (Debian package)
Operating systems & Components / Operating system package or component

Vendor Debian

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Authentication

EUVDB-ID: #VU18438

Risk: Medium

CVSSv4.0: 5.2 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-16860

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote authenticated user to compromise vulnerable domain.

The vulnerability exists due to an error within the process of obtaining kerberos ticket for a service from the Kerberos Key Distribution Center (KDC) that involves S4U2Self and S4U2Proxy extensions. A remote authenticated user can impersonate another service on the network and obtain elevated privileges within the domain.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable Active Directory implementation.

Mitigation

Update samba package to version 2:4.5.16+dfsg-1+deb9u2.

Vulnerable software versions

samba (Debian package): 2:4.5.16+dfsg-1+deb9u1

CPE2.3 External links

https://www.debian.org/security/2019/dsa-4443


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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



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