Ubuntu: Security Advisory (USN-4510-2)

# SPDX-FileCopyrightText: 2022 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("1.3.6.1.4.1.25623.1.1.12.2020.4510.2");
  script_cve_id("CVE-2020-1472");
  script_tag(name:"creation_date", value:"2022-08-26 07:43:23 +0000 (Fri, 26 Aug 2022)");
  script_version("2024-02-02T05:06:10+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:10 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"9.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-08-24 17:27:55 +0000 (Mon, 24 Aug 2020)");

  script_name("Ubuntu: Security Advisory (USN-4510-2)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 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=UBUNTU14\.04\ LTS");

  script_xref(name:"Advisory-ID", value:"USN-4510-2");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-4510-2");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'samba' package(s) announced via the USN-4510-2 advisory.");

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

  script_tag(name:"insight", value:"USN-4510-1 fixed a vulnerability in Samba. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

 Tom Tervoort discovered that the Netlogon protocol implemented by Samba
 incorrectly handled the authentication scheme. A remote attacker could use
 this issue to forge an authentication token and steal the credentials of
 the domain admin.

 This update fixes the issue by changing the 'server schannel' setting to
 default to 'yes', instead of 'auto', which will force a secure netlogon
 channel. This may result in compatibility issues with older devices. A
 future update may allow a finer-grained control over this setting.");

  script_tag(name:"affected", value:"'samba' package(s) on Ubuntu 14.04.");

  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 == "UBUNTU14.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"samba", ver:"2:4.3.11+dfsg-0ubuntu0.14.04.20+esm9", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

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

exit(0);