7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7 High
AI Score
Confidence
High
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
13.4%
The remote host is missing an update for the
# SPDX-FileCopyrightText: 2021 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("1.3.6.1.4.1.25623.1.0.844891");
script_cve_id("CVE-2021-20194", "CVE-2021-26930", "CVE-2021-26931", "CVE-2021-3348");
script_tag(name:"creation_date", value:"2021-04-14 03:00:22 +0000 (Wed, 14 Apr 2021)");
script_version("2024-02-02T05:06:08+0000");
script_tag(name:"last_modification", value:"2024-02-02 05:06:08 +0000 (Fri, 02 Feb 2024)");
script_tag(name:"cvss_base", value:"4.6");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:P/I:P/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2021-02-23 18:35:29 +0000 (Tue, 23 Feb 2021)");
script_name("Ubuntu: Security Advisory (USN-4909-1)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone AG");
script_family("Ubuntu Local Security Checks");
script_dependencies("gather-package-list.nasl");
script_mandatory_keys("ssh/login/ubuntu_linux", "ssh/login/packages", re:"ssh/login/release=UBUNTU(18\.04\ LTS|20\.04\ LTS)");
script_xref(name:"Advisory-ID", value:"USN-4909-1");
script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-4909-1");
script_tag(name:"summary", value:"The remote host is missing an update for the 'linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4' package(s) announced via the USN-4909-1 advisory.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");
script_tag(name:"insight", value:"Loris Reiff discovered that the BPF implementation in the Linux kernel did
not properly validate attributes in the getsockopt BPF hook. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2021-20194)
Olivier Benjamin, Norbert Manthey, Martin Mazein, and Jan H. Schonherr
discovered that the Xen paravirtualization backend in the Linux kernel did
not properly propagate errors to frontend drivers in some situations. An
attacker in a guest VM could possibly use this to cause a denial of service
(host domain crash). (CVE-2021-26930)
Jan Beulich discovered that multiple Xen backends in the Linux kernel did
not properly handle certain error conditions under paravirtualization. An
attacker in a guest VM could possibly use this to cause a denial of service
(host domain crash). (CVE-2021-26931)
It was discovered that the network block device (nbd) driver in the Linux
kernel contained a use-after-free vulnerability during device setup. A
local attacker with access to the nbd device could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2021-3348)");
script_tag(name:"affected", value:"'linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4' package(s) on Ubuntu 18.04, Ubuntu 20.04.");
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 == "UBUNTU18.04 LTS") {
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1013-gkeop", ver:"5.4.0-1013.14~18.04.1", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1033-raspi", ver:"5.4.0-1033.36~18.04.1", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1040-gke", ver:"5.4.0-1040.42~18.04.1", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1041-gcp", ver:"5.4.0-1041.44~18.04.1", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1042-oracle", ver:"5.4.0-1042.45~18.04.1", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1043-aws", ver:"5.4.0-1043.45~18.04.1", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1044-azure", ver:"5.4.0-1044.46~18.04.1", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-71-generic", ver:"5.4.0-71.79~18.04.1", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-71-generic-lpae", ver:"5.4.0-71.79~18.04.1", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-71-lowlatency", ver:"5.4.0-71.79~18.04.1", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-aws", ver:"5.4.0.1043.26", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-azure", ver:"5.4.0.1044.24", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-gcp", ver:"5.4.0.1041.28", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic-hwe-18.04", ver:"5.4.0.71.79~18.04.64", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic-lpae-hwe-18.04", ver:"5.4.0.71.79~18.04.64", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-gke-5.4", ver:"5.4.0.1040.42~18.04.7", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-gkeop-5.4", ver:"5.4.0.1013.14~18.04.14", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-lowlatency-hwe-18.04", ver:"5.4.0.71.79~18.04.64", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-oem", ver:"5.4.0.71.79~18.04.64", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-oem-osp1", ver:"5.4.0.71.79~18.04.64", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-oracle", ver:"5.4.0.1042.45~18.04.24", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-raspi-hwe-18.04", ver:"5.4.0.1033.35", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-snapdragon-hwe-18.04", ver:"5.4.0.71.79~18.04.64", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-virtual-hwe-18.04", ver:"5.4.0.71.79~18.04.64", rls:"UBUNTU18.04 LTS"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
if(release == "UBUNTU20.04 LTS") {
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1013-gkeop", ver:"5.4.0-1013.14", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1033-raspi", ver:"5.4.0-1033.36", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1037-kvm", ver:"5.4.0-1037.38", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1041-gcp", ver:"5.4.0-1041.44", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1042-oracle", ver:"5.4.0-1042.45", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1043-aws", ver:"5.4.0-1043.45", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-1044-azure", ver:"5.4.0-1044.46", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-71-generic", ver:"5.4.0-71.79", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-71-generic-lpae", ver:"5.4.0-71.79", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.4.0-71-lowlatency", ver:"5.4.0-71.79", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-aws", ver:"5.4.0.1043.44", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-azure", ver:"5.4.0.1044.42", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-gcp", ver:"5.4.0.1041.50", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic", ver:"5.4.0.71.74", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic-lpae", ver:"5.4.0.71.74", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-gkeop", ver:"5.4.0.1013.16", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-gkeop-5.4", ver:"5.4.0.1013.16", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-kvm", ver:"5.4.0.1037.35", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-lowlatency", ver:"5.4.0.71.74", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-oem", ver:"5.4.0.71.74", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-oem-osp1", ver:"5.4.0.71.74", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-oracle", ver:"5.4.0.1042.39", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-raspi", ver:"5.4.0.1033.68", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-raspi2", ver:"5.4.0.1033.68", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"linux-image-virtual", ver:"5.4.0.71.74", rls:"UBUNTU20.04 LTS"))) {
report += res;
}
if(report != "") {
security_message(data:report);
} else if(__pkg_match) {
exit(99);
}
exit(0);
}
exit(0);
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7 High
AI Score
Confidence
High
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
13.4%