Debian DSA-2557-1 : hostapd - buffer overflow

Medium Nessus Plugin ID 62452

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VPR Score: 3.6


The remote Debian host is missing a security-related update.


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.


Upgrade the hostapd packages.

For the stable distribution (squeeze), this problem has been fixed in version 1:0.6.10-2+squeeze1.

See Also

Plugin Details

Severity: Medium

ID: 62452

File Name: debian_DSA-2557.nasl

Version: 1.8

Type: local

Agent: unix

Published: 2012/10/09

Updated: 2020/03/12

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS v2.0

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:hostapd, cpe:/o:debian:debian_linux:6.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Patch Publication Date: 2012/10/08

Reference Information

CVE: CVE-2012-4445

DSA: 2557