Ubuntu: Security Advisory (USN-3158-1)

# SPDX-FileCopyrightText: 2016 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("1.3.6.1.4.1.25623.1.0.842995");
  script_cve_id("CVE-2016-2123", "CVE-2016-2125", "CVE-2016-2126");
  script_tag(name:"creation_date", value:"2016-12-20 04:42:07 +0000 (Tue, 20 Dec 2016)");
  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:"6.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/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:"2019-01-29 15:11:42 +0000 (Tue, 29 Jan 2019)");

  script_name("Ubuntu: Security Advisory (USN-3158-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2016 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(12\.04\ LTS|14\.04\ LTS|16\.04\ LTS|16\.10)");

  script_xref(name:"Advisory-ID", value:"USN-3158-1");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-3158-1");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'samba' package(s) announced via the USN-3158-1 advisory.");

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

  script_tag(name:"insight", value:"Frederic Besler and others discovered that the ndr_pull_dnsp_nam
function in Samba contained an integer overflow. An authenticated
attacker could use this to gain administrative privileges. This issue
only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10.
(CVE-2016-2123)

Simo Sorce discovered that Samba clients always requested
a forwardable ticket when using Kerberos authentication. An
attacker could use this to impersonate an authenticated user or
service. (CVE-2016-2125)

Volker Lendecke discovered that Kerberos PAC validation implementation
in Samba contained multiple vulnerabilities. An authenticated attacker
could use this to cause a denial of service or gain administrative
privileges. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04
LTS, and Ubuntu 16.10. (CVE-2016-2126)");

  script_tag(name:"affected", value:"'samba' package(s) on Ubuntu 12.04, Ubuntu 14.04, Ubuntu 16.04, Ubuntu 16.10.");

  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 == "UBUNTU12.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"libsmbclient", ver:"2:3.6.25-0ubuntu0.12.04.5", rls:"UBUNTU12.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba", ver:"2:3.6.25-0ubuntu0.12.04.5", rls:"UBUNTU12.04 LTS"))) {
    report += res;
  }

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

if(release == "UBUNTU14.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"libsmbclient", ver:"2:4.3.11+dfsg-0ubuntu0.14.04.4", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba", ver:"2:4.3.11+dfsg-0ubuntu0.14.04.4", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"winbind", ver:"2:4.3.11+dfsg-0ubuntu0.14.04.4", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

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

if(release == "UBUNTU16.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"libsmbclient", ver:"2:4.3.11+dfsg-0ubuntu0.16.04.3", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba", ver:"2:4.3.11+dfsg-0ubuntu0.16.04.3", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"winbind", ver:"2:4.3.11+dfsg-0ubuntu0.16.04.3", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

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

if(release == "UBUNTU16.10") {

  if(!isnull(res = isdpkgvuln(pkg:"libsmbclient", ver:"2:4.4.5+dfsg-2ubuntu5.2", rls:"UBUNTU16.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba", ver:"2:4.4.5+dfsg-2ubuntu5.2", rls:"UBUNTU16.10"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"winbind", ver:"2:4.4.5+dfsg-2ubuntu5.2", rls:"UBUNTU16.10"))) {
    report += res;
  }

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

exit(0);