Denial of service in FreeBSD



Published: 2018-08-15
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-14526
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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FreeBSD
Operating systems & Components / Operating system

Linux kernel
Operating systems & Components / Operating system

Vendor FreeBSD Foundation
Linux Foundation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper input validation

EUVDB-ID: #VU14295

Risk: Low

CVSSv3.1:

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

FreeBSD: 5.3 - 11.1

Linux kernel: 4.12.6


CPE2.3 External links

http://www.freebsd.org/security/advisories/FreeBSD-SA-18:11.hostapd.asc

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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