Oracle Linux 6 / 7 : dovecot (ELSA-2014-0790)

2014-06-26T00:00:00
ID ORACLELINUX_ELSA-2014-0790.NASL
Type nessus
Reporter Tenable
Modified 2015-12-01T00:00:00

Description

From Red Hat Security Advisory 2014:0790 :

Updated dovecot packages that fix one security issue are now available for Red Hat Enterprise Linux 6 and 7.

The Red Hat Security Response Team has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Dovecot is an IMAP server, written with security primarily in mind, for Linux and other UNIX-like systems. It also contains a small POP3 server. It supports mail in both the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages.

It was discovered that Dovecot did not properly discard connections trapped in the SSL/TLS handshake phase. A remote attacker could use this flaw to cause a denial of service on an IMAP/POP3 server by exhausting the pool of available connections and preventing further, legitimate connections to the IMAP/POP3 server to be made. (CVE-2014-3430)

All dovecot users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the updated packages, the dovecot service will be restarted automatically.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2014:0790 and 
# Oracle Linux Security Advisory ELSA-2014-0790 respectively.
#

include("compat.inc");

if (description)
{
  script_id(76232);
  script_version("$Revision: 1.5 $");
  script_cvs_date("$Date: 2015/12/01 17:25:14 $");

  script_cve_id("CVE-2014-3430");
  script_bugtraq_id(67306);
  script_xref(name:"RHSA", value:"2014:0790");

  script_name(english:"Oracle Linux 6 / 7 : dovecot (ELSA-2014-0790)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Oracle Linux host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"From Red Hat Security Advisory 2014:0790 :

Updated dovecot packages that fix one security issue are now available
for Red Hat Enterprise Linux 6 and 7.

The Red Hat Security Response Team has rated this update as having
Moderate security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from
the CVE link in the References section.

Dovecot is an IMAP server, written with security primarily in mind,
for Linux and other UNIX-like systems. It also contains a small POP3
server. It supports mail in both the maildir or mbox format. The SQL
drivers and authentication plug-ins are provided as subpackages.

It was discovered that Dovecot did not properly discard connections
trapped in the SSL/TLS handshake phase. A remote attacker could use
this flaw to cause a denial of service on an IMAP/POP3 server by
exhausting the pool of available connections and preventing further,
legitimate connections to the IMAP/POP3 server to be made.
(CVE-2014-3430)

All dovecot users are advised to upgrade to these updated packages,
which contain a backported patch to correct this issue. After
installing the updated packages, the dovecot service will be restarted
automatically."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2014-July/004283.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2014-June/004215.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected dovecot 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:ND/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:dovecot");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:dovecot-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:dovecot-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:dovecot-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:dovecot-pigeonhole");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");

  script_set_attribute(attribute:"patch_publication_date", value:"2014/07/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/06/26");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2015 Tenable Network Security, Inc.");
  script_family(english:"Oracle Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "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);
if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux");
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !eregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux");
os_ver = eregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux");
os_ver = os_ver[1];
if (! ereg(pattern:"^(6|7)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 6 / 7", "Oracle Linux " + os_ver);

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 ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu);

flag = 0;
if (rpm_check(release:"EL6", reference:"dovecot-2.0.9-7.el6_5.1")) flag++;
if (rpm_check(release:"EL6", reference:"dovecot-devel-2.0.9-7.el6_5.1")) flag++;
if (rpm_check(release:"EL6", reference:"dovecot-mysql-2.0.9-7.el6_5.1")) flag++;
if (rpm_check(release:"EL6", reference:"dovecot-pgsql-2.0.9-7.el6_5.1")) flag++;
if (rpm_check(release:"EL6", reference:"dovecot-pigeonhole-2.0.9-7.el6_5.1")) flag++;

if (rpm_check(release:"EL7", cpu:"x86_64", reference:"dovecot-2.2.10-4.el7_0.1")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"dovecot-mysql-2.2.10-4.el7_0.1")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"dovecot-pgsql-2.2.10-4.el7_0.1")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"dovecot-pigeonhole-2.2.10-4.el7_0.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "dovecot / dovecot-devel / dovecot-mysql / dovecot-pgsql / etc");
}