Improper input validation in busybox (Alpine package)

1) Improper input validation

EUVDB-ID: #VU14295

Risk: Low

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:Clear]

CVE-ID: CVE-2018-14526

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists on the systems where WPA2/RSN style of EAPOL-Key construction is used with TKIP negotiated as the pairwise cipher due to an error when processing malicious input. A remote attacker can send specially crafted unauthenticated EAPOL-Key frame data to modify the Group Transient Key (GTK) and prevent the target system from accepting group-addressed frames.

Mitigation

Install update from vendor's website.

Vulnerable software versions

busybox (Alpine package): 1.31.1-r16 - 1.31.1-r21

busybox (Alpine package):

CPE2.3

• cpe:2.3:o:alpine:busybox_alpine_package:1.31.1-r16:*:*:*:*:alpine_linux:*:3.12
• cpe:2.3:o:alpine:busybox_alpine_package:1.31.1-r17:*:*:*:*:alpine_linux:*:3.12
• cpe:2.3:o:alpine:busybox_alpine_package:1.31.1-r18:*:*:*:*:alpine_linux:*:3.12
• cpe:2.3:o:alpine:busybox_alpine_package::*:*:*:*:alpine_linux:*:*

External links

https://git.alpinelinux.org/aports/commit/?id=76077dfdd8d77220a469c5743b7b7fd3484300a1

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.