CVE-2019-9495

low
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

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.

References

http://packetstormsecurity.com/files/152914/FreeBSD-Security-Advisory-FreeBSD-SA-19-03.wpa.html

https://lists.debian.org/debian-lts-announce/2019/07/msg00030.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/56OBBOJJSKRTDGEXZOVFSTP4HDSDBLAE/

https://lists.fedoraproject.org/archives/list/[email protected]/message/SVMJOFEYBGXZLFF5IOLW67SSOPKFEJP3/

https://lists.fedoraproject.org/archives/list/[email protected]/message/TDOZGR3T7FVO5JSZWK2QPR7AOFIEJTIZ/

https://seclists.org/bugtraq/2019/May/40

https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc

https://w1.fi/security/2019-2/

https://www.synology.com/security/advisory/Synology_SA_19_16

Details

Source: MITRE

Published: 2019-04-17

Updated: 2019-05-15

Type: CWE-327

Risk Information

CVSS v2

Base Score: 4.3

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

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 3.7

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Impact Score: 1.4

Exploitability Score: 2.2

Severity: LOW

Tenable Plugins

View all (13 total)

IDNameProductFamilySeverity
143704SUSE SLES12 Security Update : wpa_supplicant (SUSE-SU-2020:3424-1) (KRACK)NessusSuSE Local Security Checks
high
143627SUSE SLED15 / SLES15 Security Update : wpa_supplicant (SUSE-SU-2020:3380-1) (KRACK)NessusSuSE Local Security Checks
high
143321openSUSE Security Update : wpa_supplicant (openSUSE-2020-2053) (KRACK)NessusSuSE Local Security Checks
high
143304openSUSE Security Update : wpa_supplicant (openSUSE-2020-2059) (KRACK)NessusSuSE Local Security Checks
high
133758openSUSE Security Update : hostapd (openSUSE-2020-222) (KRACK)NessusSuSE Local Security Checks
high
127476Debian DLA-1867-1 : wpa security updateNessusDebian Local Security Checks
high
124554Fedora 30 : hostapd (2019-eba1109acd)NessusFedora Local Security Checks
high
124539Fedora 30 : 1:wpa_supplicant (2019-ca49dfd42f)NessusFedora Local Security Checks
high
124252Fedora 29 : hostapd (2019-f409af9fbe)NessusFedora Local Security Checks
high
124250Fedora 28 : hostapd (2019-d03bae77f5)NessusFedora Local Security Checks
high
124221FreeBSD : FreeBSD -- EAP-pwd side-channel attack (60129efe-656d-11e9-8e67-206a8a720317)NessusFreeBSD Local Security Checks
low
124038Debian DSA-4430-1 : wpa - security updateNessusDebian Local Security Checks
high
123999Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : wpa_supplicant and hostapd vulnerabilities (USN-3944-1)NessusUbuntu Local Security Checks
high