CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS
Percentile
79.7%
A vulnerability has been found in the ASN.1 parser of strongSwan, an IKE daemon used to establish IPsec protected links.
By sending a crafted ID_DER_ASN1_DN ID payload to a vulnerable pluto or charon daemon, a malicious remote user can provoke a denial of service (daemon crash) or an authorization bypass (impersonating a different user, potentially acquiring VPN permissions she doesn’t have).
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-2789. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(70733);
script_version("1.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2013-6075");
script_xref(name:"DSA", value:"2789");
script_name(english:"Debian DSA-2789-1 : strongswan - Denial of service and authorization bypass");
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 has been found in the ASN.1 parser of strongSwan, an
IKE daemon used to establish IPsec protected links.
By sending a crafted ID_DER_ASN1_DN ID payload to a vulnerable pluto
or charon daemon, a malicious remote user can provoke a denial of
service (daemon crash) or an authorization bypass (impersonating a
different user, potentially acquiring VPN permissions she doesn't
have)."
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/squeeze/strongswan"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/wheezy/strongswan"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2013/dsa-2789"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the strongswan packages.
For the oldstable distribution (squeeze), this problem has been fixed
in version 4.4.1-5.4.
For the stable distribution (wheezy), this problem has been fixed in
version 4.5.2-1.5+deb7u2."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");
script_set_attribute(attribute:"patch_publication_date", value:"2013/11/01");
script_set_attribute(attribute:"plugin_publication_date", value:"2013/11/02");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2013-2021 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:"6.0", prefix:"libstrongswan", reference:"4.4.1-5.4")) flag++;
if (deb_check(release:"6.0", prefix:"strongswan", reference:"4.4.1-5.4")) flag++;
if (deb_check(release:"6.0", prefix:"strongswan-dbg", reference:"4.4.1-5.4")) flag++;
if (deb_check(release:"6.0", prefix:"strongswan-ikev1", reference:"4.4.1-5.4")) flag++;
if (deb_check(release:"6.0", prefix:"strongswan-ikev2", reference:"4.4.1-5.4")) flag++;
if (deb_check(release:"6.0", prefix:"strongswan-nm", reference:"4.4.1-5.4")) flag++;
if (deb_check(release:"6.0", prefix:"strongswan-starter", reference:"4.4.1-5.4")) flag++;
if (deb_check(release:"7.0", prefix:"libstrongswan", reference:"4.5.2-1.5+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"strongswan", reference:"4.5.2-1.5+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"strongswan-dbg", reference:"4.5.2-1.5+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"strongswan-ikev1", reference:"4.5.2-1.5+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"strongswan-ikev2", reference:"4.5.2-1.5+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"strongswan-nm", reference:"4.5.2-1.5+deb7u2")) flag++;
if (deb_check(release:"7.0", prefix:"strongswan-starter", reference:"4.5.2-1.5+deb7u2")) 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");