hostapd 0.6.7 through 2.5 and wpa_supplicant 0.6.7 through 2.5 do not reject \n and \r characters in passphrase parameters, which allows remote attackers to cause a denial of service (daemon outage) via a crafted WPS operation.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2016-4476 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 1.9 |
|---|---|
| Base Metrics | AV:L/AC:M/Au:N/C:N/I:N/A:P |
| Access Vector | Local |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 5.9 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H |
| Attack Vector | Adjacent Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | High |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | wpa_supplicant | Will not fix |
| Red Hat Enterprise Linux 6 | wpa_supplicant | Will not fix |
| Red Hat Enterprise Linux 5 | wpa_supplicant | Not affected |
Vulmon