Debian DLA-2611-1 : ldb security update

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-2611-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(148272);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/04/05");

  script_cve_id("CVE-2020-27840", "CVE-2021-20277");

  script_name(english:"Debian DLA-2611-1 : ldb security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description",
    value:
"Two issues have been found in ldb, an LDAP-like embedded database, for
example used with samba.

Both issues are related to out of bounds access, either an out of
bound read or a heap corrupton, both most likely leading to an
application crash.

For Debian 9 stretch, these problems have been fixed in version
2:1.1.27-1+deb9u2.

We recommend that you upgrade your ldb packages.

For the detailed security status of ldb please refer to its security
tracker page at: https://security-tracker.debian.org/tracker/ldb

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.debian.org/debian-lts-announce/2021/03/msg00036.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/ldb"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/ldb"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-20277");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ldb-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libldb-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libldb1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-ldb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-ldb-dev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2021/03/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/04/01");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"9.0", prefix:"ldb-tools", reference:"2:1.1.27-1+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libldb-dev", reference:"2:1.1.27-1+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libldb1", reference:"2:1.1.27-1+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"python-ldb", reference:"2:1.1.27-1+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"python-ldb-dev", reference:"2:1.1.27-1+deb9u2")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");