CVE-2019-9495

The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of cache access patterns. All versions of hostapd and wpa_supplicant with EAP-PWD support are vulnerable. The ability to install and execute applications is necessary for a successful attack. Memory access patterns are visible in a shared cache. Weak passwords may be cracked. Versions of hostapd/wpa_supplicant 2.7 and newer, are not vulnerable to the timing attack described in CVE-2019-9494. Both hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7 are affected.

Weakness

The code uses a cache that contains sensitive information, but the cache can be read by an actor outside of the intended control sphere.

Affected Software

Name	Vendor	Start Version	End Version
Hostapd	W1.fi	*	2.7 (including)
Wpa_supplicant	W1.fi	*	2.7 (including)
Wpa	Ubuntu	bionic	*
Wpa	Ubuntu	cosmic	*
Wpa	Ubuntu	devel	*
Wpa	Ubuntu	disco	*
Wpa	Ubuntu	esm-infra-legacy/trusty	*
Wpa	Ubuntu	esm-infra/bionic	*
Wpa	Ubuntu	esm-infra/xenial	*
Wpa	Ubuntu	trusty	*
Wpa	Ubuntu	trusty/esm	*
Wpa	Ubuntu	upstream	*
Wpa	Ubuntu	xenial	*

Potential Mitigations

https://cwe.mitre.org/data/definitions/204.html

NVD	https://nvd.nist.gov/vuln/detail/CVE-2019-9495
CWE	https://cwe.mitre.org/data/definitions/524.html

Use of Cache Containing Sensitive Information

Weakness

Affected Software

Potential Mitigations

References

CVE-2019-9495

Use of Cache Containing Sensitive Information

Weakness

Affected Software

Potential Mitigations

Related Attack Patterns

References