Ubuntu: Security Advisory (USN-4725-1)

# 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("1.3.6.1.4.1.25623.1.0.844818");
  script_cve_id("CVE-2020-11947", "CVE-2020-15859", "CVE-2020-27821", "CVE-2020-28916", "CVE-2020-29443", "CVE-2021-20181");
  script_tag(name:"creation_date", value:"2021-02-09 04:00:43 +0000 (Tue, 09 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:H/UI:N/S:C/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-06-04 17:05:12 +0000 (Fri, 04 Jun 2021)");

  script_name("Ubuntu: Security Advisory (USN-4725-1)");
  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(16\.04\ LTS|18\.04\ LTS|20\.04\ LTS|20\.10)");

  script_xref(name:"Advisory-ID", value:"USN-4725-1");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-4725-1");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'qemu' package(s) announced via the USN-4725-1 advisory.");

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

  script_tag(name:"insight", value:"It was discovered that QEMU incorrectly handled memory in iSCSI emulation.
An attacker inside the guest could possibly use this issue to obtain
sensitive information. This issue only affected Ubuntu 16.04 LTS, Ubuntu
18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2020-11947)

Alexander Bulekov discovered that QEMU incorrectly handled Intel e1000e
emulation. An attacker inside the guest could use this issue to cause QEMU
to crash, resulting in a denial of service. (CVE-2020-15859)

Alexander Bulekov discovered that QEMU incorrectly handled memory region
cache. An attacker inside the guest could use this issue to cause QEMU to
crash, resulting in a denial of service. This issue only affected Ubuntu
20.04 LTS, and Ubuntu 20.10. (CVE-2020-27821)

Cheol-woo Myung discovered that QEMU incorrectly handled Intel e1000e
emulation. An attacker inside the guest could use this issue to cause a
denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04
LTS, and Ubuntu 20.10. (CVE-2020-28916)

Wenxiang Qian discovered that QEMU incorrectly handled ATAPI emulation. An
attacker inside the guest could use this issue to cause QEMU to crash,
resulting in a denial of service. (CVE-2020-29443)

It was discovered that QEMU incorrectly handled VirtFS directory sharing.
An attacker inside the guest could use this issue to cause QEMU to crash,
resulting in a denial of service. (CVE-2021-20181)");

  script_tag(name:"affected", value:"'qemu' package(s) on Ubuntu 16.04, Ubuntu 18.04, 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 == "UBUNTU16.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system", ver:"1:2.5+dfsg-5ubuntu10.49", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-aarch64", ver:"1:2.5+dfsg-5ubuntu10.49", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-arm", ver:"1:2.5+dfsg-5ubuntu10.49", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-mips", ver:"1:2.5+dfsg-5ubuntu10.49", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-misc", ver:"1:2.5+dfsg-5ubuntu10.49", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-ppc", ver:"1:2.5+dfsg-5ubuntu10.49", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-s390x", ver:"1:2.5+dfsg-5ubuntu10.49", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-sparc", ver:"1:2.5+dfsg-5ubuntu10.49", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-x86", ver:"1:2.5+dfsg-5ubuntu10.49", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

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

if(release == "UBUNTU18.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system", ver:"1:2.11+dfsg-1ubuntu7.35", rls:"UBUNTU18.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-arm", ver:"1:2.11+dfsg-1ubuntu7.35", rls:"UBUNTU18.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-mips", ver:"1:2.11+dfsg-1ubuntu7.35", rls:"UBUNTU18.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-misc", ver:"1:2.11+dfsg-1ubuntu7.35", rls:"UBUNTU18.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-ppc", ver:"1:2.11+dfsg-1ubuntu7.35", rls:"UBUNTU18.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-s390x", ver:"1:2.11+dfsg-1ubuntu7.35", rls:"UBUNTU18.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-sparc", ver:"1:2.11+dfsg-1ubuntu7.35", rls:"UBUNTU18.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-x86", ver:"1:2.11+dfsg-1ubuntu7.35", 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:"qemu-system", ver:"1:4.2-3ubuntu6.12", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-arm", ver:"1:4.2-3ubuntu6.12", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-mips", ver:"1:4.2-3ubuntu6.12", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-misc", ver:"1:4.2-3ubuntu6.12", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-ppc", ver:"1:4.2-3ubuntu6.12", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-s390x", ver:"1:4.2-3ubuntu6.12", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-sparc", ver:"1:4.2-3ubuntu6.12", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-x86", ver:"1:4.2-3ubuntu6.12", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-x86-microvm", ver:"1:4.2-3ubuntu6.12", rls:"UBUNTU20.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-x86-xen", ver:"1:4.2-3ubuntu6.12", 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:"qemu-system", ver:"1:5.0-5ubuntu9.4", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-arm", ver:"1:5.0-5ubuntu9.4", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-mips", ver:"1:5.0-5ubuntu9.4", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-misc", ver:"1:5.0-5ubuntu9.4", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-ppc", ver:"1:5.0-5ubuntu9.4", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-s390x", ver:"1:5.0-5ubuntu9.4", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-sparc", ver:"1:5.0-5ubuntu9.4", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-x86", ver:"1:5.0-5ubuntu9.4", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-x86-microvm", ver:"1:5.0-5ubuntu9.4", rls:"UBUNTU20.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"qemu-system-x86-xen", ver:"1:5.0-5ubuntu9.4", rls:"UBUNTU20.10"))) {
    report += res;
  }

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

exit(0);