Debian: Security Advisory (DSA-4428-1)

# 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("1.3.6.1.4.1.25623.1.0.704428");
  script_cve_id("CVE-2019-3842");
  script_tag(name:"creation_date", value:"2019-04-09 02:00:12 +0000 (Tue, 09 Apr 2019)");
  script_version("2024-02-02T05:06:06+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:06 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"4.4");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:P/I:P/A:P");
  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:"2019-04-11 02:48:01 +0000 (Thu, 11 Apr 2019)");

  script_name("Debian: Security Advisory (DSA-4428-1)");
  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=DEB9");

  script_xref(name:"Advisory-ID", value:"DSA-4428-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2019/DSA-4428-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-4428");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/systemd");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'systemd' package(s) announced via the DSA-4428-1 advisory.");

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

  script_tag(name:"insight", value:"Jann Horn discovered that the PAM module in systemd insecurely uses the environment and lacks seat verification permitting spoofing an active session to PolicyKit. A remote attacker with SSH access can take advantage of this issue to gain PolicyKit privileges that are normally only granted to clients in an active session on the local console.

For the stable distribution (stretch), this problem has been fixed in version 232-25+deb9u11.

This update includes updates previously scheduled to be released in the stretch 9.9 point release.

We recommend that you upgrade your systemd packages.

For the detailed security status of systemd please refer to its security tracker page at: [link moved to references]");

  script_tag(name:"affected", value:"'systemd' package(s) on Debian 9.");

  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 == "DEB9") {

  if(!isnull(res = isdpkgvuln(pkg:"libnss-myhostname", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libnss-mymachines", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libnss-resolve", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libnss-systemd", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libpam-systemd", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsystemd-dev", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsystemd0", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libudev-dev", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libudev1", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libudev1-udeb", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"systemd", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"systemd-container", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"systemd-coredump", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"systemd-journal-remote", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"systemd-sysv", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"udev", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"udev-udeb", ver:"232-25+deb9u11", rls:"DEB9"))) {
    report += res;
  }

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

exit(0);