The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side-channel attacks

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.

Scores

EPSS (exploitation in 30 days)

3.9% · top 9.7% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.

Weakness

• CWE-208 Information Exposure Through Timing Discrepancy (opens in a new tab)All about CWE-208 and its CVEs
• CWE-524 Information Exposure Through Caching (opens in a new tab)All about CWE-524 and its CVEs
• CWE-203 (opens in a new tab)All about CWE-203 and its CVEs

Affected products

• Wi-Fi Alliance · hostapd with SAE support

  • affected 2.7 – ≤ 2.7

• Wi-Fi Alliance · wpa_supplicant with SAE support

  • affected 2.7 – ≤ 2.7

References (9)

• https://w1.fi/security/2019-1/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://www.synology.com/security/advisory/Synology_SA_19_16 (opens in a new tab)x_refsource_CONFIRMx_transferred
• FEDORA-2019-d03bae77f5 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• FEDORA-2019-f409af9fbe (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• FEDORA-2019-eba1109acd (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• FreeBSD-SA-19:03 (opens in a new tab)vendor-advisoryx_refsource_FREEBSDx_transferred
• 20190515 FreeBSD Security Advisory FreeBSD-SA-19:03.wpa (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• http://packetstormsecurity.com/files/152914/FreeBSD-Security-Advisory-FreeBSD-SA-19-03.wpa.html (opens in a new tab)x_refsource_MISCx_transferred
• openSUSE-SU-2020:0222 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-9494](https://trackcve.app/badge/CVE-2019-9494.svg)](https://trackcve.app/cve/CVE-2019-9494)

Record last updated 4 Aug 2024, 21:54 UTC.