RHEL 4 / 5 / 6 : dovecot (RHSA-2011:1187)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2011:1187. The text 
# itself is copyright (C) Red Hat, Inc.
#

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

if (description)
{
  script_id(55917);
  script_version("1.19");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2011-1929");
  script_bugtraq_id(47930);
  script_xref(name:"RHSA", value:"2011:1187");

  script_name(english:"RHEL 4 / 5 / 6 : dovecot (RHSA-2011:1187)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated dovecot packages that fix one security issue are now available
for Red Hat Enterprise Linux 4, 5, and 6.

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 for Linux, UNIX, and similar operating
systems, primarily written with security in mind.

A denial of service flaw was found in the way Dovecot handled NULL
characters in certain header names. A mail message with specially
crafted headers could cause the Dovecot child process handling the
target user's connection to crash, blocking them from downloading the
message successfully and possibly leading to the corruption of their
mailbox. (CVE-2011-1929)

Users of dovecot are advised to upgrade to these updated packages,
which contain a backported patch to resolve this issue. After
installing the updated packages, the dovecot service will be restarted
automatically."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2011-1929"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2011:1187"
  );
  script_set_attribute(attribute:"solution", value:"Update 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_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:dovecot");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:dovecot-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:dovecot-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:dovecot-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:dovecot-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:dovecot-pigeonhole");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6.1");

  script_set_attribute(attribute:"vuln_publication_date", value:"2011/05/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/08/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/08/20");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2011-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.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) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^(4|5|6)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 4.x / 5.x / 6.x", "Red Hat " + 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$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2011:1187";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL4", reference:"dovecot-0.99.11-10.EL4")) flag++;


  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"dovecot-1.0.7-7.el5_7.1")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"dovecot-1.0.7-7.el5_7.1")) flag++;

  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"dovecot-1.0.7-7.el5_7.1")) flag++;


  if (rpm_check(release:"RHEL6", reference:"dovecot-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", reference:"dovecot-debuginfo-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"dovecot-devel-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"dovecot-devel-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"dovecot-devel-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"dovecot-mysql-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"dovecot-mysql-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"dovecot-mysql-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"dovecot-pgsql-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"dovecot-pgsql-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"dovecot-pgsql-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"i686", reference:"dovecot-pigeonhole-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"dovecot-pigeonhole-2.0.9-2.el6_1.1")) flag++;

  if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"dovecot-pigeonhole-2.0.9-2.el6_1.1")) flag++;


  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "dovecot / dovecot-debuginfo / dovecot-devel / dovecot-mysql / etc");
  }
}