Ubuntu: Security Advisory (USN-3348-1)

# SPDX-FileCopyrightText: 2017 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("1.3.6.1.4.1.25623.1.0.843236");
  script_cve_id("CVE-2017-9461");
  script_tag(name:"creation_date", value:"2017-07-14 10:24:50 +0000 (Fri, 14 Jul 2017)");
  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:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:N/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2017-06-06 21:29:00 +0000 (Tue, 06 Jun 2017)");

  script_name("Ubuntu: Security Advisory (USN-3348-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 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(14\.04\ LTS|16\.04\ LTS|16\.10|17\.04)");

  script_xref(name:"Advisory-ID", value:"USN-3348-1");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-3348-1");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'samba' package(s) announced via the USN-3348-1 advisory.");

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

  script_tag(name:"insight", value:"It was discovered that Samba incorrectly handled dangling symlinks. A
remote attacker could possibly use this issue to cause Samba to hang,
resulting in a denial of service. This issue only applied to Ubuntu 14.04
LTS and Ubuntu 16.04 LTS. (CVE-2017-9461)

In addition, this update fixes a regression introduced by USN-3267-1
that caused Samba to incorrectly handle non-wide symlinks to directories.");

  script_tag(name:"affected", value:"'samba' package(s) on Ubuntu 14.04, Ubuntu 16.04, Ubuntu 16.10, Ubuntu 17.04.");

  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-0ubuntu0.14.04.9", 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:"samba", ver:"2:4.3.11+dfsg-0ubuntu0.16.04.8", 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:"samba", ver:"2:4.4.5+dfsg-2ubuntu5.7", rls:"UBUNTU16.10"))) {
    report += res;
  }

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

if(release == "UBUNTU17.04") {

  if(!isnull(res = isdpkgvuln(pkg:"samba", ver:"2:4.5.8+dfsg-0ubuntu0.17.04.3", rls:"UBUNTU17.04"))) {
    report += res;
  }

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

exit(0);