#VU33069 Integer overflow in BusyBox - CVE-2016-2147

Vulnerability identifier: #VU33069

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-2147

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

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

Vendor: busybox.net

Description

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

Integer overflow in the DHCP client (udhcpc) in BusyBox before 1.25.0 allows remote attackers to cause a denial of service (crash) via a malformed RFC1035-encoded domain name, which triggers an out-of-bounds heap write.

Mitigation
Install update from vendor's website.

Vulnerable software versions

BusyBox: 1.00 - 1.24.2

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External links
https://packetstormsecurity.com/files/153278/WAGO-852-Industrial-Managed-Switch-Series-Code-Execution-Hardcoded-Credentials.html
https://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html
https://seclists.org/fulldisclosure/2019/Jun/18
https://seclists.org/fulldisclosure/2019/Sep/7
https://www.openwall.com/lists/oss-security/2016/03/11/16
https://busybox.net/news.html
https://git.busybox.net/busybox/commit/?id=d474ffc68290e0a83651c4432eeabfa62cd51e87
https://lists.debian.org/debian-lts-announce/2018/07/msg00037.html
https://seclists.org/bugtraq/2019/Jun/14
https://seclists.org/bugtraq/2019/Sep/7
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 Internet.

Is there known malware, which exploits this vulnerability?

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