A vulnerability was found in the WPA protocol implementation found in wpa_supplication (station) and hostapd (access point).
The EAP-pwd implementation in hostapd (EAP server) and wpa_supplicant (EAP peer) doesn’t properly validate fragmentation reassembly state when receiving an unexpected fragment. This could lead to a process crash due to a NULL pointer derefrence.
An attacker in radio range of a station or access point with EAP-pwd support could cause a crash of the relevant process (wpa_supplicant or hostapd), ensuring a denial of service.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-4450. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include("compat.inc");
if (description)
{
script_id(125414);
script_version("1.2");
script_cvs_date("Date: 2020/01/15");
script_cve_id("CVE-2019-11555");
script_xref(name:"DSA", value:"4450");
script_name(english:"Debian DSA-4450-1 : wpa - security update");
script_summary(english:"Checks dpkg output for the updated package");
script_set_attribute(
attribute:"synopsis",
value:"The remote Debian host is missing a security-related update."
);
script_set_attribute(
attribute:"description",
value:
"A vulnerability was found in the WPA protocol implementation found in
wpa_supplication (station) and hostapd (access point).
The EAP-pwd implementation in hostapd (EAP server) and wpa_supplicant
(EAP peer) doesn't properly validate fragmentation reassembly state
when receiving an unexpected fragment. This could lead to a process
crash due to a NULL pointer derefrence.
An attacker in radio range of a station or access point with EAP-pwd
support could cause a crash of the relevant process (wpa_supplicant or
hostapd), ensuring a denial of service."
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=927463"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/source-package/wpa"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/stretch/wpa"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2019/dsa-4450"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the wpa packages.
For the stable distribution (stretch), this problem has been fixed in
version 2:2.4-1+deb9u4."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:wpa");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/26");
script_set_attribute(attribute:"patch_publication_date", value:"2019/05/24");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/28");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Debian Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");
exit(0);
}
include("audit.inc");
include("debian_package.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (deb_check(release:"9.0", prefix:"hostapd", reference:"2:2.4-1+deb9u4")) flag++;
if (deb_check(release:"9.0", prefix:"wpagui", reference:"2:2.4-1+deb9u4")) flag++;
if (deb_check(release:"9.0", prefix:"wpasupplicant", reference:"2:2.4-1+deb9u4")) flag++;
if (deb_check(release:"9.0", prefix:"wpasupplicant-udeb", reference:"2:2.4-1+deb9u4")) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
else security_warning(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | wpa | p-cpe:/a:debian:debian_linux:wpa |
debian | debian_linux | 9.0 | cpe:/o:debian:debian_linux:9.0 |