#VU18673 Heap-based buffer overflow in BusyBox - CVE-2016-2148

Vulnerability identifier: #VU18673

Vulnerability risk: Medium

CVSSv4.0: 4.4 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-2148

CWE-ID: CWE-122

Exploitation vector: Local network

Exploit availability: No

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

Vendor: busybox.net

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in udhcpc client when parsing DHCP packets with specially crafted OPTION_6RD option. A remote attacker can trick the victim to connect to malicious DHCP server, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

BusyBox: 1.20.0 - 1.24.2

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External links
https://www.openwall.com/lists/oss-security/2016/03/11/16
https://busybox.net/news.html
https://git.busybox.net/busybox/commit/?id=352f79acbd759c14399e39baef21fc4ffe180ac2
https://lists.debian.org/debian-lts-announce/2018/07/msg00037.html
https://security.gentoo.org/glsa/201612-04
https://usn.ubuntu.com/3935-1/

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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.