CVE-2015-5315

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% 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_peer/eap_pwd.c in wpa_supplicant 2.x before 2.6 does not validate that the reassembly buffer is large enough for the final fragment when EAP-pwd is enabled in a network configuration profile, 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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