Input validation error in busybox.net BusyBox

1) Input validation error

EUVDB-ID: #VU33083

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-9645

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local authenticated user to manipulate data.

The add_probe function in modutils/modprobe.c in BusyBox before 1.23.0 allows local users to bypass intended restrictions on loading kernel modules via a / (slash) character in a module name, as demonstrated by an "ifconfig /usbserial up" command or a "mount -t /snd_pcm none /" command.

Mitigation

Install update from vendor's website.

Vulnerable software versions

BusyBox: 1.0.0 - 1.22.1

External links

http://git.busybox.net/busybox/commit/?id=4e314faa0aecb66717418e9a47a4451aec59262b
http://openwall.com/lists/oss-security/2015/01/24/4
http://seclists.org/fulldisclosure/2020/Mar/15
http://www.securityfocus.com/bid/72324
http://bugs.busybox.net/show_bug.cgi?id=7652
http://bugzilla.redhat.com/show_bug.cgi?id=1185707
http://lists.debian.org/debian-lts-announce/2018/07/msg00037.html
http://plus.google.com/+MathiasKrause/posts/PqFCo4bfrWu
http://security.gentoo.org/glsa/201503-13
http://usn.ubuntu.com/3935-1/

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.