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Debian Security Advisory DSA 2557-1 (hostapd)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update to hostapd announced via advisory DSA 2557-1.
Insight
Insight
Timo Warns discovered that the internal authentication server of hostapd, a user space IEEE 802.11 AP and IEEE 802.1X/WPA/WPA2/EAP Authenticator, is vulnerable to a buffer overflow when processing fragmented EAP-TLS messages. As a result, an internal overflow checking routine terminates the process. An attacker can abuse this flaw to conduct denial of service attacks via crafted EAP-TLS messages prior to any authentication. For the stable distribution (squeeze), this problem has been fixed in version 0.6.10-2+squeeze1. For the testing (wheezy) and unstable (sid) distributions, this problem will be fixed soon.
Solution
Solution
We recommend that you upgrade your hostapd packages.