Vulnerabilities > CVE-2008-4870 - Incorrect Permission Assignment for Critical Resource vulnerability in Dovecot 1.0.7

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200812-16.
#
# The advisory text is Copyright (C) 2001-2016 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(35108);
  script_version("1.13");
  script_cvs_date("Date: 2019/08/02 13:32:45");

  script_cve_id("CVE-2008-4577", "CVE-2008-4578", "CVE-2008-4870", "CVE-2008-4907");
  script_bugtraq_id(31587);
  script_xref(name:"GLSA", value:"200812-16");

  script_name(english:"GLSA-200812-16 : Dovecot: Multiple vulnerabilities");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-200812-16
(Dovecot: Multiple vulnerabilities)

    Several vulnerabilities were found in Dovecot:
    The 'k'
    right in the acl_plugin does not work as expected (CVE-2008-4577,
    CVE-2008-4578)
    The dovecot.conf is world-readable, providing
    improper protection for the ssl_key_password setting
    (CVE-2008-4870)
    A permanent Denial of Service with broken mail
    headers is possible (CVE-2008-4907)
  
Impact :

    These vulnerabilities might allow a remote attacker to cause a Denial
    of Service, to circumvent security restrictions or allow local
    attackers to disclose the passphrase of the SSL private key.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200812-16"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All Dovecot users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=net-mail/dovecot-1.1.7-r1'
    Users should be aware that dovecot.conf will still be world-readable
    after the update. If employing ssl_key_password, it should not be used
    in dovecot.conf but in a separate file which should be included with
    'include_try'."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(20, 264);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:dovecot");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/12/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/12/15");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2008-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"net-mail/dovecot", unaffected:make_list("ge 1.1.7-r1"), vulnerable:make_list("lt 1.1.7-r1"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:qpkg_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Dovecot");
}

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#

include("compat.inc");

if (description)
{
  script_id(60524);
  script_version("1.4");
  script_cvs_date("Date: 2019/10/25 13:36:18");

  script_cve_id("CVE-2008-4577", "CVE-2008-4870");

  script_name(english:"Scientific Linux Security Update : dovecot on SL5.x i386/x86_64");
  script_summary(english:"Checks rpm output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Scientific Linux host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A flaw was found in Dovecot's ACL plug-in. The ACL plug-in treated
negative access rights as positive rights, which could allow an
attacker to bypass intended access restrictions. (CVE-2008-4577)

A password disclosure flaw was found with Dovecot's configuration
file. If a system had the 'ssl_key_password' option defined, any local
user could view the SSL key password. (CVE-2008-4870)

Note: This flaw did not allow the attacker to acquire the contents of
the SSL key. The password has no value without the key file which
arbitrary users should not have read access to.

To better protect even this value, however, the dovecot.conf file now
supports the '!include_try' directive. The ssl_key_password option
should be moved from dovecot.conf to a new file owned by, and only
readable and writable by, root (ie 0600). This file should be
referenced from dovecot.conf by setting the '!include_try
[/path/to/password/file]' option.

Additionally, this update addresses the following bugs :

  - the dovecot init script -- /etc/rc.d/init.d/dovecot --
    did not check if the dovecot binary or configuration
    files existed. It also used the wrong pid file for
    checking the dovecot service's status. This update
    includes a new init script that corrects these errors.

  - the %files section of the dovecot spec file did not
    include '%dir %{ssldir}/private'. As a consequence, the
    /etc/pki/private/ directory was not owned by dovecot.
    (Note: files inside /etc/pki/private/ were and are owned
    by dovecot.) With this update, the missing line has been
    added to the spec file, and the noted directory is now
    owned by dovecot.

  - in some previously released versions of dovecot, the
    authentication process accepted (and passed along
    un-escaped) passwords containing characters that had
    special meaning to dovecot's internal protocols. This
    updated release prevents such passwords from being
    passed back, instead returning the error, 'Attempted
    login with password having illegal chars'.

Note: dovecot versions previously shipped with Scientific Linux 5 did
not allow this behavior. This update addresses the issue above but
said issue was only present in versions of dovecot not previously
included with Scientific Linux 5."
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind0901&L=scientific-linux-errata&T=0&P=1781
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?e8523540"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected dovecot package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
  script_cwe_id(264);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2009/01/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/08/01");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Scientific Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);


flag = 0;
if (rpm_check(release:"SL5", reference:"dovecot-1.0.7-7.el5")) flag++;


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