Debian: Security Advisory (DLA-1762-1)

# 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("1.3.6.1.4.1.25623.1.0.891762");
  script_cve_id("CVE-2017-18078", "CVE-2019-3842");
  script_tag(name:"creation_date", value:"2019-04-25 02:00:07 +0000 (Thu, 25 Apr 2019)");
  script_version("2024-02-02T05:06:07+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:07 +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:"2018-02-28 18:16:51 +0000 (Wed, 28 Feb 2018)");

  script_name("Debian: Security Advisory (DLA-1762-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("Debian Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB8");

  script_xref(name:"Advisory-ID", value:"DLA-1762-1");
  script_xref(name:"URL", value:"https://www.debian.org/lts/security/2019/DLA-1762-1");
  script_xref(name:"URL", value:"https://wiki.debian.org/LTS");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'systemd' package(s) announced via the DLA-1762-1 advisory.");

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

  script_tag(name:"insight", value:"Two vulnerabilities have been addressed in the systemd components systemd-tmpfiles and pam_systemd.so.

CVE-2017-18078

systemd-tmpfiles in systemd attempted to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allowed local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacked write access.

CVE-2019-3842

It was discovered that pam_systemd did not properly sanitize the environment before using the XDG_SEAT variable. It was possible for an attacker, in some particular configurations, to set a XDG_SEAT environment variable which allowed for commands to be checked against polkit policies using the allow_active element rather than allow_any.

For Debian 8 Jessie, these problems have been fixed in version 215-17+deb8u12.

We recommend that you upgrade your systemd packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: [link moved to references]");

  script_tag(name:"affected", value:"'systemd' package(s) on Debian 8.");

  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 == "DEB8") {

  if(!isnull(res = isdpkgvuln(pkg:"gir1.2-gudev-1.0", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libgudev-1.0-0", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libgudev-1.0-dev", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libpam-systemd", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsystemd-daemon-dev", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsystemd-daemon0", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsystemd-dev", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsystemd-id128-0", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsystemd-id128-dev", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsystemd-journal-dev", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsystemd-journal0", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsystemd-login-dev", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsystemd-login0", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsystemd0", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libudev-dev", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libudev1", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libudev1-udeb", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"python3-systemd", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"systemd", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"systemd-dbg", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"systemd-sysv", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"udev", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"udev-udeb", ver:"215-17+deb8u12", rls:"DEB8"))) {
    report += res;
  }

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

exit(0);