| Name | CVE-2019-9496 |
| Description | An invalid authentication sequence could result in the hostapd process terminating due to missing state validation steps when processing the SAE confirm message when in hostapd/AP mode. All version of hostapd with SAE support are vulnerable. An attacker may force the hostapd process to terminate, performing a denial of service attack. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.7 are affected. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 926801 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| wpa (PTS) | jessie, jessie (lts) | 2.3-1+deb8u15 | vulnerable |
| stretch (security) | 2:2.4-1+deb9u9 | vulnerable |
| stretch (lts), stretch | 2:2.4-1+deb9u11 | vulnerable |
| buster, buster (lts) | 2:2.7+git20190128+0c1e29f-6+deb10u5 | fixed |
| buster (security) | 2:2.7+git20190128+0c1e29f-6+deb10u4 | fixed |
| bullseye (security), bullseye | 2:2.9.0-21+deb11u2 | fixed |
| bookworm (security), bookworm | 2:2.10-12+deb12u2 | fixed |
| sid, trixie | 2:2.10-22 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| wpa | source | wheezy | (unfixed) | end-of-life | | |
| wpa | source | (unstable) | 2:2.7+git20190128+0c1e29f-4 | | | 926801 |
Notes
[stretch] - wpa <ignored> (SAE code not enabled for build in stretch)
[jessie] - wpa <ignored> (SAE code not enabled for build in jessie)
https://w1.fi/security/2019-3/sae-confirm-missing-state-validation.txt
Patches: https://w1.fi/security/2019-3/
CONFIG_SAE=y enabled since 2:2.7~git20180706+420b5dd-1