What’s Vulnerable › Vulnerabilities

CVE-2015-5314

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-02-21 · updated 2026-06-17
• Weakness: CWE-119

Description

The eap_pwd_process function in eap_server/eap_server_pwd.c in hostapd 2.x before 2.6 does not validate that the reassembly buffer is large enough for the final fragment when used with (1) an internal EAP server or (2) a RADIUS server and EAP-pwd is enabled in a runtime configuration, which allows remote attackers to cause a denial of service (process termination) via a large final fragment in an EAP-pwd message.

Affected products

• Debian Linux: 8.0
• Canonical Ltd. wpa_supplicant: from 2.0 before 2.6 — fixed in 2.6

How to fix

Upgrade to a fixed version: Canonical Ltd. wpa_supplicant 2.6. Check the vendor advisory for mitigations.

References

• http://w1.fi/security/2015-7/eap-pwd-missing-last-fragment-length-validation.txt
• http://www.openwall.com/lists/oss-security/2015/11/10/10
• http://www.ubuntu.com/usn/USN-2808-1
• https://www.debian.org/security/2015/dsa-3397
• http://w1.fi/security/2015-7/eap-pwd-missing-last-fragment-length-validation.txt
• http://www.openwall.com/lists/oss-security/2015/11/10/10
• http://www.ubuntu.com/usn/USN-2808-1
• https://www.debian.org/security/2015/dsa-3397

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