Debian: Security Advisory (DSA-3740-1)

# 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("1.3.6.1.4.1.25623.1.0.703740");
  script_cve_id("CVE-2016-2119", "CVE-2016-2123", "CVE-2016-2125", "CVE-2016-2126");
  script_tag(name:"creation_date", value:"2016-12-18 23:00:00 +0000 (Sun, 18 Dec 2016)");
  script_version("2024-02-02T05:06:05+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:05 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/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("Debian: Security Advisory (DSA-3740-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2016 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:"DSA-3740-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2016/DSA-3740-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-3740");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'samba' package(s) announced via the DSA-3740-1 advisory.");

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

  script_tag(name:"insight", value:"Several vulnerabilities have been discovered in Samba, a SMB/CIFS file, print, and login server for Unix. The Common Vulnerabilities and Exposures project identifies the following issues:

CVE-2016-2119

Stefan Metzmacher discovered that client-side SMB2/3 required signing can be downgraded, allowing a man-in-the-middle attacker to impersonate a server being connected to by Samba, and return malicious results.

CVE-2016-2123

Trend Micro's Zero Day Initiative and Frederic Besler discovered that the routine ndr_pull_dnsp_name, used to parse data from the Samba Active Directory ldb database, contains an integer overflow flaw, leading to an attacker-controlled memory overwrite. An authenticated user can take advantage of this flaw for remote privilege escalation.

CVE-2016-2125

Simo Sorce of Red Hat discovered that the Samba client code always requests a forwardable ticket when using Kerberos authentication. A target server, which must be in the current or trusted domain/realm, is given a valid general purpose Kerberos Ticket Granting Ticket (TGT), which can be used to fully impersonate the authenticated user or service.

CVE-2016-2126

Volker Lendecke discovered several flaws in the Kerberos PAC validation. A remote, authenticated, attacker can cause the winbindd process to crash using a legitimate Kerberos ticket due to incorrect handling of the PAC checksum. A local service with access to the winbindd privileged pipe can cause winbindd to cache elevated access permissions.

For the stable distribution (jessie), these problems have been fixed in version 2:4.2.14+dfsg-0+deb8u2. In addition, this update contains several changes originally targeted for the upcoming jessie point release.

We recommend that you upgrade your samba packages.");

  script_tag(name:"affected", value:"'samba' 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:"ctdb", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libnss-winbind", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libpam-smbpass", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libpam-winbind", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libparse-pidl-perl", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsmbclient", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libsmbclient-dev", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libwbclient-dev", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libwbclient0", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"python-samba", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"registry-tools", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba-common", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba-common-bin", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba-dbg", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba-dev", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba-doc", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba-dsdb-modules", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba-libs", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba-testsuite", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"samba-vfs-modules", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"smbclient", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"winbind", ver:"2:4.2.14+dfsg-0+deb8u2", rls:"DEB8"))) {
    report += res;
  }

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

exit(0);