Permissions, Privileges, and Access Controls in hostapd (Alpine package)

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU23964

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-9499

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to the implementations of EAP-PWD in wpa_supplicant EAP Peer, when built against a crypto library missing explicit validation on imported elements, do not validate the scalar and element values in EAP-pwd-Commit. A remote attacker can complete authentication, session key and control of the data connection with a client.

This vulnerability affects the following products:

• hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.4

• hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7

Mitigation

Install update from vendor's website.

Vulnerable software versions

hostapd (Alpine package): 1.1-r0 - 2.7-r3

CPE2.3

• cpe:2.3:a:alpine:hostapd_alpine_package:1.1-r0:*:*:*:*:alpine_linux:*:2.5
• cpe:2.3:a:alpine:hostapd_alpine_package:2.0-r0:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:alpine:hostapd_alpine_package:2.1-r0:*:*:*:*:alpine_linux:*:2.7

External links

https://git.alpinelinux.org/aports/commit/?id=b7d037c2a9b8f72b1230453919246b1637028ada
https://git.alpinelinux.org/aports/commit/?id=4d3ebcee7e5f68b1e6f145336363ec5a52d6ca17
https://git.alpinelinux.org/aports/commit/?id=a39d043ea01e0fb7b6bde640d1d2e3fb90685a1e

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.