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CVE-2019-9496

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Date: April 17, 2019

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.

Language: C

Severity Score

Related Resources (16)

https://seclists.org/bugtraq/2019/May/40
https://security.alpinelinux.org/vuln/CVE-2019-9496
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SVMJOFEYBGXZLFF5IOLW67SSOPKFEJP3/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TDOZGR3T7FVO5JSZWK2QPR7AOFIEJTIZ/
https://nvd.nist.gov/vuln/detail/CVE-2019-9496
https://w1.fi/security/2019-3/
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00021.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/56OBBOJJSKRTDGEXZOVFSTP4HDSDBLAE/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TDOZGR3T7FVO5JSZWK2QPR7AOFIEJTIZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVMJOFEYBGXZLFF5IOLW67SSOPKFEJP3/
http://packetstormsecurity.com/files/152914/FreeBSD-Security-Advisory-FreeBSD-SA-19-03.wpa.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/56OBBOJJSKRTDGEXZOVFSTP4HDSDBLAE/
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc
https://www.synology.com/security/advisory/Synology_SA_19_16
https://security-tracker.debian.org/tracker/CVE-2019-9496
https://www.mend.io/vulnerability-database/CVE-2019-9496

Severity Score

Weakness Type (CWE)

Improper Authentication

CWE-287

External Control of Critical State Data

CWE-642

Top Fix

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Upgrade Version

Upgrade to version wpa-supplicant - 2.9

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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