#VU33083 Input validation error in BusyBox - CVE-2014-9645

Vulnerability identifier: #VU33083

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2014-9645

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
BusyBox
Universal components / Libraries / Software for developers

Vendor: busybox.net

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: 1.00 - 1.22.1

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

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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.