Ubuntu: Security Advisory (USN-4038-3)

# SPDX-FileCopyrightText: 2019 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("1.3.6.1.4.1.25623.1.0.844080");
  script_tag(name:"creation_date", value:"2019-07-05 02:00:40 +0000 (Fri, 05 Jul 2019)");
  script_version("2023-06-21T05:06:21+0000");
  script_tag(name:"last_modification", value:"2023-06-21 05:06:21 +0000 (Wed, 21 Jun 2023)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");

  script_name("Ubuntu: Security Advisory (USN-4038-3)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 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|18\.10|19\.04)");

  script_xref(name:"Advisory-ID", value:"USN-4038-3");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-4038-3");
  script_xref(name:"URL", value:"https://launchpad.net/bugs/1834494");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'bzip2' package(s) announced via the USN-4038-3 advisory.");

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

  script_tag(name:"insight", value:"USN-4038-1 fixed a vulnerability in bzip2. The update introduced a regression causing
bzip2 to incorrect raises CRC errors for some files.

We apologize for the inconvenience.

Original advisory details:

 It was discovered that bzip2 incorrectly handled certain files.
 An attacker could possibly use this issue to execute arbitrary code.");

  script_tag(name:"affected", value:"'bzip2' package(s) on Ubuntu 16.04, Ubuntu 18.04, Ubuntu 18.10, Ubuntu 19.04.");

  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 == "UBUNTU16.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"bzip2", ver:"1.0.6-8ubuntu0.2", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libbz2-1.0", ver:"1.0.6-8ubuntu0.2", 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:"bzip2", ver:"1.0.6-8.1ubuntu0.2", rls:"UBUNTU18.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libbz2-1.0", ver:"1.0.6-8.1ubuntu0.2", rls:"UBUNTU18.04 LTS"))) {
    report += res;
  }

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

if(release == "UBUNTU18.10") {

  if(!isnull(res = isdpkgvuln(pkg:"bzip2", ver:"1.0.6-9ubuntu0.18.10.1", rls:"UBUNTU18.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libbz2-1.0", ver:"1.0.6-9ubuntu0.18.10.1", rls:"UBUNTU18.10"))) {
    report += res;
  }

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

if(release == "UBUNTU19.04") {

  if(!isnull(res = isdpkgvuln(pkg:"bzip2", ver:"1.0.6-9ubuntu0.19.04.1", rls:"UBUNTU19.04"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libbz2-1.0", ver:"1.0.6-9ubuntu0.19.04.1", rls:"UBUNTU19.04"))) {
    report += res;
  }

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

exit(0);