Ubuntu: Security Advisory (USN-4727-1)

# 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("1.3.6.1.4.1.25623.1.0.844828");
  script_cve_id("CVE-2021-26708");
  script_tag(name:"creation_date", value:"2021-02-11 04:00:20 +0000 (Thu, 11 Feb 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:"6.9");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:H/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:"2021-02-11 00:02:11 +0000 (Thu, 11 Feb 2021)");

  script_name("Ubuntu: Security Advisory (USN-4727-1)");
  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(20\.04\ LTS|20\.10)");

  script_xref(name:"Advisory-ID", value:"USN-4727-1");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-4727-1");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oem-5.6, linux-oracle, linux-raspi' package(s) announced via the USN-4727-1 advisory.");

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

  script_tag(name:"insight", value:"Alexander Popov discovered that multiple race conditions existed in the
AF_VSOCK implementation in the Linux kernel. A local attacker could use
this to cause a denial of service (system crash) or execute arbitrary code.");

  script_tag(name:"affected", value:"'linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oem-5.6, linux-oracle, linux-raspi' package(s) on Ubuntu 20.04, Ubuntu 20.10.");

  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 == "UBUNTU20.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.6.0-1047-oem", ver:"5.6.0-1047.51", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-43-generic", ver:"5.8.0-43.49~20.04.1", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-43-generic-lpae", ver:"5.8.0-43.49~20.04.1", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-43-lowlatency", ver:"5.8.0-43.49~20.04.1", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic-64k-hwe-20.04", ver:"5.8.0.43.49~20.04.29", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic-hwe-20.04", ver:"5.8.0.43.49~20.04.29", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic-lpae-hwe-20.04", ver:"5.8.0.43.49~20.04.29", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-lowlatency-hwe-20.04", ver:"5.8.0.43.49~20.04.29", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-oem-20.04", ver:"5.6.0.1047.43", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-virtual-hwe-20.04", ver:"5.8.0.43.49~20.04.29", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

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

if(release == "UBUNTU20.10") {

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-1015-raspi", ver:"5.8.0-1015.18", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-1015-raspi-nolpae", ver:"5.8.0-1015.18", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-1018-kvm", ver:"5.8.0-1018.20", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-1020-oracle", ver:"5.8.0-1020.21", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-1022-azure", ver:"5.8.0-1022.24", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-1022-gcp", ver:"5.8.0-1022.23", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-1023-aws", ver:"5.8.0-1023.25", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-43-generic", ver:"5.8.0-43.49", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-43-generic-64k", ver:"5.8.0-43.49", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-43-generic-lpae", ver:"5.8.0-43.49", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-5.8.0-43-lowlatency", ver:"5.8.0-43.49", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-aws", ver:"5.8.0.1023.25", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-azure", ver:"5.8.0.1022.22", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-gcp", ver:"5.8.0.1022.22", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic", ver:"5.8.0.43.48", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic-64k", ver:"5.8.0.43.48", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-generic-lpae", ver:"5.8.0.43.48", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-gke", ver:"5.8.0.1022.22", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-kvm", ver:"5.8.0.1018.20", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-lowlatency", ver:"5.8.0.43.48", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-oracle", ver:"5.8.0.1020.19", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-raspi", ver:"5.8.0.1015.18", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-raspi-nolpae", ver:"5.8.0.1015.18", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"linux-image-virtual", ver:"5.8.0.43.48", rls:"UBUNTU20.10"))) {
    report += res;
  }

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

exit(0);