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ubuntucveUbuntu.comUB:CVE-2019-9495
HistoryApr 10, 2019 - 12:00 a.m.

CVE-2019-9495

2019-04-1000:00:00
ubuntu.com
ubuntu.com
17
eap-pwd
side-channel attack
cache access
hostapd
wpa_supplicant
weak passwords
timing attack
cve-2019-9495
memory access patterns
unix

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

0.012

Percentile

85.6%

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.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchwpa< 2:2.6-15ubuntu2.2UNKNOWN
ubuntu18.10noarchwpa< 2:2.6-18ubuntu1.1UNKNOWN
ubuntu19.04noarchwpa< 2:2.6-21ubuntu3UNKNOWN
ubuntu14.04noarchwpa< 2.1-0ubuntu1.7UNKNOWN
ubuntu16.04noarchwpa< 2.4-0ubuntu6.4UNKNOWN

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS3

5.9

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

0.012

Percentile

85.6%