Ubuntu update for Samba

1) Infinite loop

EUVDB-ID: #VU7663

Risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-9461

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to cause DoS condition on the target system.

The weakness exists due to improper handling of symbolic links. A remote attacker with access to trusted or internal networks can transmit specially crafted data, trigger and infinite loop and cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Update the affected packages

Ubuntu 17.04:

samba 2:4.5.8+dfsg-0ubuntu0.17.04.3

Ubuntu 16.10:

samba 2:4.4.5+dfsg-2ubuntu5.7

Ubuntu 16.04 LTS:

samba 2:4.3.11+dfsg-0ubuntu0.16.04.8

Ubuntu 14.04 LTS:

samba 2:4.3.11+dfsg-0ubuntu0.14.04.9

Vulnerable software versions

Ubuntu: 14.04 - 17.04

CPE2.3

• cpe:2.3:o:canonical:ubuntu:14.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:16.10:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:17.04:*:*:*:*:*:*:*

External links

https://www.ubuntu.com/usn/usn-3348-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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