Multiple vulnerabilities have been discovered in the Xen hypervisor.
The Common Vulnerabilities and Exposures project identifies the following problems :
CVE-2015-8338 Julien Grall discovered that Xen on ARM was susceptible to denial of service via long running memory operations.
CVE-2016-4480 Jan Beulich discovered that incorrect page table handling could result in privilege escalation inside a Xen guest instance.
CVE-2016-4962 Wei Liu discovered multiple cases of missing input sanitising in libxl which could result in denial of service.
CVE-2016-5242 Aaron Cornelius discovered that incorrect resource handling on ARM systems could result in denial of service.
CVE-2016-6258 Jeremie Boutoille discovered that incorrect pagetable handling in PV instances could result in guest to host privilege escalation.
#%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-3633. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(92614);
script_version("2.14");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");
script_cve_id("CVE-2015-8338", "CVE-2016-4480", "CVE-2016-4962", "CVE-2016-5242", "CVE-2016-6258");
script_xref(name:"DSA", value:"3633");
script_xref(name:"IAVB", value:"2016-B-0118-S");
script_name(english:"Debian DSA-3633-1 : xen - security update (Bunker Buster)");
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:
"Multiple vulnerabilities have been discovered in the Xen hypervisor.
The Common Vulnerabilities and Exposures project identifies the
following problems :
- CVE-2015-8338
Julien Grall discovered that Xen on ARM was susceptible
to denial of service via long running memory operations.
- CVE-2016-4480
Jan Beulich discovered that incorrect page table
handling could result in privilege escalation inside a
Xen guest instance.
- CVE-2016-4962
Wei Liu discovered multiple cases of missing input
sanitising in libxl which could result in denial of
service.
- CVE-2016-5242
Aaron Cornelius discovered that incorrect resource
handling on ARM systems could result in denial of
service.
- CVE-2016-6258
Jeremie Boutoille discovered that incorrect pagetable
handling in PV instances could result in guest to host
privilege escalation."
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2015-8338"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2016-4480"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2016-4962"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2016-5242"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2016-6258"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/jessie/xen"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2016/dsa-3633"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the xen packages.
For the stable distribution (jessie), these problems have been fixed
in version 4.4.1-9+deb8u6."
);
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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:"exploit_available", value:"false");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
script_set_attribute(attribute:"patch_publication_date", value:"2016/07/27");
script_set_attribute(attribute:"in_the_news", value:"true");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/07/29");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2016-2021 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:"8.0", prefix:"libxen-4.4", reference:"4.4.1-9+deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"libxen-dev", reference:"4.4.1-9+deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"libxenstore3.0", reference:"4.4.1-9+deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"xen-hypervisor-4.4-amd64", reference:"4.4.1-9+deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"xen-hypervisor-4.4-arm64", reference:"4.4.1-9+deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"xen-hypervisor-4.4-armhf", reference:"4.4.1-9+deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"xen-system-amd64", reference:"4.4.1-9+deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"xen-system-arm64", reference:"4.4.1-9+deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"xen-system-armhf", reference:"4.4.1-9+deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"xen-utils-4.4", reference:"4.4.1-9+deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"xen-utils-common", reference:"4.4.1-9+deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"xenstore-utils", reference:"4.4.1-9+deb8u6")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
else security_hole(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | xen | p-cpe:/a:debian:debian_linux:xen |
debian | debian_linux | 8.0 | cpe:/o:debian:debian_linux:8.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8338
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4480
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4962
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5242
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6258
packages.debian.org/source/jessie/xen
security-tracker.debian.org/tracker/CVE-2015-8338
security-tracker.debian.org/tracker/CVE-2016-4480
security-tracker.debian.org/tracker/CVE-2016-4962
security-tracker.debian.org/tracker/CVE-2016-5242
security-tracker.debian.org/tracker/CVE-2016-6258
www.debian.org/security/2016/dsa-3633