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CVE-2019-9495

LOWCVSS 3.7/10EPSS 3.45%

Last modified

CVE-2019-9495 is a low-severity vulnerability rated 3.7/10 on the CVSS scale. 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. EPSS estimates a 3.45% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
3.7/10

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

EPSS Probability
3.45%

87.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
W1.FiHostapd<= 2.7
W1.FiWpa Supplicant<= 2.7
FedoraprojectFedora28
FedoraprojectFedora29
FedoraprojectFedora30
OpensuseBackports Sle15.0
OpensuseLeap15.1
SynologyRadius Server3.0
SynologyRouter Manager< 1.2.3-8017
DebianDebian Linux8.0
FreebsdFreebsd11.2
FreebsdFreebsd12.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2019-9495?
CVE-2019-9495 has a CVSS score of 3.7/10 (LOW severity). The EPSS model estimates a 3.45% probability of exploitation in the next 30 days.
How do I fix CVE-2019-9495?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-9495?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST