CVE-2019-9496 Denial of service in hostapd with SAE support

What is CVE-2019-9496?

CVE-2019-9496 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 17 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-287, CWE-642

Which versions are affected by CVE-2019-9496?

It affects 3 products.

Products include Fedoraproject Fedora, W1.fi Hostapd, W1.fi Wpa Supplicant.

How do I fix CVE-2019-9496?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-9496 being exploited?

There is no known exploitation of CVE-2019-9496 in the wild and no public exploit code.

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• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
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• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2019-9496, DEBIAN-CVE-2019-9496, GHSA-cvwc-47mg-vx9r.