Risk | Low |
Patch available | NO |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2018-14526 |
CWE-ID | CWE-20 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
wpa_supplicant Server applications / Encryption software |
Vendor | Jouni Malinen |
Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU14295
Risk: Low
CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]
CVE-ID: CVE-2018-14526
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe 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.
MitigationThe vendor offers possible mitigation steps:
- Remove TKIP as an allowed pairwise cipher in RSN/WPA2 networks. This
can be done also on the AP side.
- Merge the following commits to wpa_supplicant and rebuild:
WPA: Ignore unauthenticated encrypted EAPOL-Key data
- Update to wpa_supplicant v2.7 or newer, once available.
wpa_supplicant: 2.0.0 - 2.6
External linkshttp://w1.fi/security/2018-1/unauthenticated-eapol-key-decryption.txt
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.