6.1 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:P/I:P/A:C
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
7.7 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
26.7%
The remote host is missing an update for the Debian
# SPDX-FileCopyrightText: 2018 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.704131");
script_cve_id("CVE-2018-7540", "CVE-2018-7541", "CVE-2018-7542");
script_tag(name:"creation_date", value:"2018-03-03 23:00:00 +0000 (Sat, 03 Mar 2018)");
script_version("2024-02-02T05:06:06+0000");
script_tag(name:"last_modification", value:"2024-02-02 05:06:06 +0000 (Fri, 02 Feb 2024)");
script_tag(name:"cvss_base", value:"6.1");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:P/I:P/A:C");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2018-03-17 00:17:05 +0000 (Sat, 17 Mar 2018)");
script_name("Debian: Security Advisory (DSA-4131-1)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2018 Greenbone AG");
script_family("Debian Local Security Checks");
script_dependencies("gather-package-list.nasl");
script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB9");
script_xref(name:"Advisory-ID", value:"DSA-4131-1");
script_xref(name:"URL", value:"https://www.debian.org/security/2018/DSA-4131-1");
script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-4131");
script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/xen");
script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'xen' package(s) announced via the DSA-4131-1 advisory.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");
script_tag(name:"insight", value:"Multiple vulnerabilities have been discovered in the Xen hypervisor:
CVE-2018-7540
Jann Horn discovered that missing checks in page table freeing may result in denial of service.
CVE-2018-7541
Jan Beulich discovered that incorrect error handling in grant table checks may result in guest-to-host denial of service and potentially privilege escalation.
CVE-2018-7542
Ian Jackson discovered that insufficient handling of x86 PVH guests without local APICs may result in guest-to-host denial of service.
For the stable distribution (stretch), these problems have been fixed in version 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5.
We recommend that you upgrade your xen packages.
For the detailed security status of xen please refer to its security tracker page at: [link moved to references]");
script_tag(name:"affected", value:"'xen' package(s) on Debian 9.");
script_tag(name:"solution", value:"Please install the updated package(s).");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"qod_type", value:"package");
exit(0);
}
include("revisions-lib.inc");
include("pkg-lib-deb.inc");
release = dpkg_get_ssh_release();
if(!release)
exit(0);
res = "";
report = "";
if(release == "DEB9") {
if(!isnull(res = isdpkgvuln(pkg:"libxen-4.8", ver:"4.8.3+comet2+shim4.10.0+comet3-1+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libxen-dev", ver:"4.8.3+comet2+shim4.10.0+comet3-1+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libxenstore3.0", ver:"4.8.3+comet2+shim4.10.0+comet3-1+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"xen-hypervisor-4.8-amd64", ver:"4.8.3+comet2+shim4.10.0+comet3-1+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"xen-hypervisor-4.8-arm64", ver:"4.8.3+comet2+shim4.10.0+comet3-1+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"xen-hypervisor-4.8-armhf", ver:"4.8.3+comet2+shim4.10.0+comet3-1+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"xen-system-amd64", ver:"4.8.3+comet2+shim4.10.0+comet3-1+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"xen-system-arm64", ver:"4.8.3+comet2+shim4.10.0+comet3-1+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"xen-system-armhf", ver:"4.8.3+comet2+shim4.10.0+comet3-1+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"xen-utils-4.8", ver:"4.8.3+comet2+shim4.10.0+comet3-1+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"xen-utils-common", ver:"4.8.3+comet2+shim4.10.0+comet3-1+deb9u5", rls:"DEB9"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"xenstore-utils", ver:"4.8.3+comet2+shim4.10.0+comet3-1+deb9u5", rls:"DEB9"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
exit(0);
6.1 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:P/I:P/A:C
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
7.7 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
26.7%