CVE-2015-5314

low-risk
Published 2018-02-21

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.

Do I need to act?

~
1.1% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.9/10 Medium
NETWORK / HIGH complexity

Affected Products (2)

Affected Vendors

Debian W1.Fi

References (8)

Mitigation http://w1.fi/security/2015-7/eap-pwd-missing-last-fragment-length-validation.txt
Mailing List http://www.openwall.com/lists/oss-security/2015/11/10/10
Broken Link http://www.ubuntu.com/usn/USN-2808-1
Third Party Advisory https://www.debian.org/security/2015/dsa-3397
Mitigation http://w1.fi/security/2015-7/eap-pwd-missing-last-fragment-length-validation.txt
Mailing List http://www.openwall.com/lists/oss-security/2015/11/10/10
Broken Link http://www.ubuntu.com/usn/USN-2808-1
Third Party Advisory https://www.debian.org/security/2015/dsa-3397
28
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 3/34 · Minimal
Exposure 7/34 · Low