CVE-2019-9495

NameCVE-2019-9495
DescriptionThe 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-1867-1, DSA-4430-1
Debian Bugs926801

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
wpa (PTS)buster2:2.7+git20190128+0c1e29f-6+deb10u3fixed
buster (security)2:2.7+git20190128+0c1e29f-6+deb10u4fixed
bullseye2:2.9.0-21fixed
bookworm2:2.10-12fixed
sid, trixie2:2.10-21fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
wpasourcejessie2.3-1+deb8u8DLA-1867-1
wpasourcestretch2:2.4-1+deb9u3DSA-4430-1
wpasource(unstable)2:2.7+git20190128+0c1e29f-4926801

Notes

https://w1.fi/security/2019-2/eap-pwd-side-channel-attack.txt
Patches: https://w1.fi/security/2019-2/

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