The EAP-pwd peer implementation in hostapd and wpa_supplicant 1.0 through 2.4 does not clear the L (Length) and M (More) flags before determining if a response should be fragmented, which allows remote attackers to cause a denial of service (crash) via a crafted message.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2015-4146 from the MITRE CVE dictionary dictionary and NIST NVD.
Not vulnerable. This issue did not affect the versions of wpa_supplicant as shipped with Red Hat Enterprise Linux 5, 6, and 7.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 2.9 |
|---|---|
| Base Metrics | AV:A/AC:M/Au:N/C:N/I:N/A:P |
| Access Vector | Adjacent Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | wpa_supplicant | Not affected |
| Red Hat Enterprise Linux 6 | wpa_supplicant | Not affected |
| Red Hat Enterprise Linux 5 | wpa_supplicant | Not affected |
Vulmon