Gabriel Corona discovered that xdg-utils, a set of tools for desktop environment integration, is vulnerable to argument injection attacks.
If the environment variable BROWSER in the victim host has a ‘%s’ and the victim opens a link crafted by an attacker with xdg-open, the malicious party could manipulate the parameters used by the browser when opened. This manipulation could set, for example, a proxy to which the network traffic could be intercepted for that particular execution.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-4211. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include("compat.inc");
if (description)
{
script_id(110165);
script_version("1.5");
script_cvs_date("Date: 2018/11/13 12:30:47");
script_cve_id("CVE-2017-18266");
script_xref(name:"DSA", value:"4211");
script_name(english:"Debian DSA-4211-1 : xdg-utils - 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:
"Gabriel Corona discovered that xdg-utils, a set of tools for desktop
environment integration, is vulnerable to argument injection attacks.
If the environment variable BROWSER in the victim host has a '%s' and
the victim opens a link crafted by an attacker with xdg-open, the
malicious party could manipulate the parameters used by the browser
when opened. This manipulation could set, for example, a proxy to
which the network traffic could be intercepted for that particular
execution."
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=898317"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/source-package/xdg-utils"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/jessie/xdg-utils"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/stretch/xdg-utils"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2018/dsa-4211"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the xdg-utils packages.
For the oldstable distribution (jessie), this problem has been fixed
in version 1.1.0~rc1+git20111210-7.4+deb8u1.
For the stable distribution (stretch), this problem has been fixed in
version 1.1.1-1+deb9u1."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xdg-utils");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
script_set_attribute(attribute:"patch_publication_date", value:"2018/05/25");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/29");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2018 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:"8.0", prefix:"xdg-utils", reference:"1.1.0~rc1+git20111210-7.4+deb8u1")) flag++;
if (deb_check(release:"9.0", prefix:"xdg-utils", reference:"1.1.1-1+deb9u1")) 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 |
---|---|---|
debian | debian_linux | xdg-utils |
debian | debian_linux | 8.0 |
debian | debian_linux | 9.0 |