Improper input validation in samba (Alpine package)

1) Improper input validation

EUVDB-ID: #VU10949

Risk: Low

CVSSv4.0: 2.3 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-1050

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation when processing RPC requests to the spoolss service. A remote attacker can send a specially crafted RPC request to the affected service and trigger denial of service conditions.

Successful exploitation of the vulnerability requires that the RPC spoolss service services is configured as external daemon.

Mitigation

Install update from vendor's website.

Vulnerable software versions

samba (Alpine package): 4.1.1-r0 - 4.4.16-r1

RoboHelp: 0.60.6-r0

CPE2.3

• cpe:2.3:a:alpine:samba_alpine_package:4.1.1-r0:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:alpine:samba_alpine_package:4.1.3-r0:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:alpine:samba_alpine_package:4.1.3-r1:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:adobe:robohelp:0.60.6-r0:*:*:*:*:alpine_linux:*:1.9

External links

https://git.alpinelinux.org/aports/commit/?id=d773d4c9846c9af6fff4cf55c1942ce486760f82
https://git.alpinelinux.org/aports/commit/?id=16426b237661b92cf7fe99957baa2311bf66963e
https://git.alpinelinux.org/aports/commit/?id=879a3f1333aee0db3a97bc72522daf6f446c9684
https://git.alpinelinux.org/aports/commit/?id=ccb66a4b1c5776ef7ba3d2b064f4290512ba3c84
https://git.alpinelinux.org/aports/commit/?id=6245a2ceb9dc360ca5f8beb4419ea14952923a37

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.