Ubuntu: Security Advisory (USN-4876-1)

# 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("1.3.6.1.4.1.25623.1.0.844870");
  script_cve_id("CVE-2020-29569", "CVE-2020-36158", "CVE-2021-3178");
  script_tag(name:"creation_date", value:"2021-03-17 04:00:53 +0000 (Wed, 17 Mar 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:"7.2");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/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:"2021-01-14 20:09:33 +0000 (Thu, 14 Jan 2021)");

  script_name("Ubuntu: Security Advisory (USN-4876-1)");
  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(14\.04\ LTS|16\.04\ LTS)");

  script_xref(name:"Advisory-ID", value:"USN-4876-1");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-4876-1");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon' package(s) announced via the USN-4876-1 advisory.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");

  script_tag(name:"insight", value:"Olivier Benjamin and Pawel Wieczorkiewicz discovered a race condition the
Xen paravirt block backend in the Linux kernel, leading to a use-after-free
vulnerability. An attacker in a guest VM could use this to cause a denial
of service in the host OS. (CVE-2020-29569)

It was discovered that the Marvell WiFi-Ex device driver in the Linux
kernel did not properly validate ad-hoc SSIDs. A local attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2020-36158)

Wu Yi discovered that the NFS implementation in the Linux kernel did not
properly prevent access outside of an NFS export that is a subdirectory of
a file system. An attacker could possibly use this to bypass NFS access
restrictions. (CVE-2021-3178)");

  script_tag(name:"affected", value:"'linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon' package(s) on Ubuntu 14.04, Ubuntu 16.04.");

  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 == "UBUNTU14.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-1087-aws", ver:"4.4.0-1087.91", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-generic", ver:"4.4.0-204.236~14.04.1", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-generic-lpae", ver:"4.4.0-204.236~14.04.1", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-lowlatency", ver:"4.4.0-204.236~14.04.1", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-powerpc-e500mc", ver:"4.4.0-204.236~14.04.1", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-powerpc-smp", ver:"4.4.0-204.236~14.04.1", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-powerpc64-emb", ver:"4.4.0-204.236~14.04.1", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-powerpc64-smp", ver:"4.4.0-204.236~14.04.1", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-aws", ver:"4.4.0.1087.84", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic-lpae-lts-xenial", ver:"4.4.0.204.178", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic-lts-xenial", ver:"4.4.0.204.178", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-lowlatency-lts-xenial", ver:"4.4.0.204.178", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-powerpc-e500mc-lts-xenial", ver:"4.4.0.204.178", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-powerpc-smp-lts-xenial", ver:"4.4.0.204.178", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-powerpc64-emb-lts-xenial", ver:"4.4.0.204.178", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-powerpc64-smp-lts-xenial", ver:"4.4.0.204.178", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-virtual-lts-xenial", ver:"4.4.0.204.178", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

if(release == "UBUNTU16.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-1089-kvm", ver:"4.4.0-1089.98", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-1123-aws", ver:"4.4.0-1123.137", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-1147-raspi2", ver:"4.4.0-1147.157", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-1151-snapdragon", ver:"4.4.0-1151.161", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-generic", ver:"4.4.0-204.236", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-generic-lpae", ver:"4.4.0-204.236", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-lowlatency", ver:"4.4.0-204.236", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-powerpc-e500mc", ver:"4.4.0-204.236", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-powerpc-smp", ver:"4.4.0-204.236", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-powerpc64-emb", ver:"4.4.0-204.236", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-4.4.0-204-powerpc64-smp", ver:"4.4.0-204.236", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-aws", ver:"4.4.0.1123.128", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic", ver:"4.4.0.204.210", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic-lpae", ver:"4.4.0.204.210", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-kvm", ver:"4.4.0.1089.87", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-lowlatency", ver:"4.4.0.204.210", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-powerpc-e500mc", ver:"4.4.0.204.210", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-powerpc-smp", ver:"4.4.0.204.210", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-powerpc64-emb", ver:"4.4.0.204.210", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-powerpc64-smp", ver:"4.4.0.204.210", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-raspi2", ver:"4.4.0.1147.147", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-snapdragon", ver:"4.4.0.1151.143", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-virtual", ver:"4.4.0.204.210", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

exit(0);