Debian DLA-1736-1 : dovecot security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1736-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(123523);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/07");

  script_cve_id("CVE-2019-7524");

  script_name(english:"Debian DLA-1736-1 : dovecot security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"A security vulnerability was discovered in the Dovecot email server.
When reading FTS headers from the Dovecot index, the input buffer size
is not bounds-checked. An attacker with the ability to modify dovecot
indexes, can take advantage of this flaw for privilege escalation or
the execution of arbitrary code with the permissions of the dovecot
user. Only installations using the FTS plugins are affected.

For Debian 8 'Jessie', this problem has been fixed in version
1:2.2.13-12~deb8u6.

We recommend that you upgrade your dovecot packages.

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/2019/03/msg00038.html");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/jessie/dovecot");
  script_set_attribute(attribute:"solution", value:
"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-2019-7524");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/03/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-gssapi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-imapd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-lmtpd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-lucene");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-managesieved");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-pop3d");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-sieve");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-solr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dovecot-sqlite");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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:"8.0", prefix:"dovecot-core", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-dbg", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-dev", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-gssapi", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-imapd", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-ldap", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-lmtpd", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-lucene", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-managesieved", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-mysql", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-pgsql", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-pop3d", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-sieve", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-solr", reference:"1:2.2.13-12~deb8u6")) flag++;
if (deb_check(release:"8.0", prefix:"dovecot-sqlite", reference:"1:2.2.13-12~deb8u6")) flag++;

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