Oracle Linux 4 / 5 : krb5 (ELSA-2007-0562)

2013-07-12T00:00:00
ID ORACLELINUX_ELSA-2007-0562.NASL
Type nessus
Reporter Tenable
Modified 2015-12-01T00:00:00

Description

From Red Hat Security Advisory 2007:0562 :

Updated krb5 packages that fix several security flaws are now available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having important security impact by the Red Hat Security Response Team.

Kerberos is a network authentication system which allows clients and servers to authenticate to each other through use of symmetric encryption and a trusted third party, the KDC. kadmind is the KADM5 administration server.

David Coffey discovered an uninitialized pointer free flaw in the RPC library used by kadmind. On Red Hat Enterprise Linux 4 and 5, glibc detects attempts to free invalid pointers. A remote unauthenticated attacker who can access kadmind could trigger this flaw and cause kadmind to crash. (CVE-2007-2442)

David Coffey also discovered an overflow flaw in the RPC library used by kadmind. On Red Hat Enterprise Linux, exploitation of this flaw is limited to a denial of service. A remote unauthenticated attacker who can access kadmind could trigger this flaw and cause kadmind to crash. (CVE-2007-2443)

A stack-based buffer overflow flaw was found in kadmind. An authenticated attacker who can access kadmind could trigger this flaw and potentially execute arbitrary code on the Kerberos server. (CVE-2007-2798)

Users of krb5-server are advised to update to these erratum packages which contain backported fixes to correct these issues.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2007:0562 and 
# Oracle Linux Security Advisory ELSA-2007-0562 respectively.
#

include("compat.inc");

if (description)
{
  script_id(67535);
  script_version("$Revision: 1.6 $");
  script_cvs_date("$Date: 2015/12/01 16:16:27 $");

  script_cve_id("CVE-2007-2442", "CVE-2007-2443", "CVE-2007-2798");
  script_bugtraq_id(24653, 24655, 24657);
  script_osvdb_id(36595, 36596, 36597);
  script_xref(name:"RHSA", value:"2007:0562");

  script_name(english:"Oracle Linux 4 / 5 : krb5 (ELSA-2007-0562)");
  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 2007:0562 :

Updated krb5 packages that fix several security flaws are now
available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having important security impact by the
Red Hat Security Response Team.

Kerberos is a network authentication system which allows clients and
servers to authenticate to each other through use of symmetric
encryption and a trusted third party, the KDC. kadmind is the KADM5
administration server.

David Coffey discovered an uninitialized pointer free flaw in the RPC
library used by kadmind. On Red Hat Enterprise Linux 4 and 5, glibc
detects attempts to free invalid pointers. A remote unauthenticated
attacker who can access kadmind could trigger this flaw and cause
kadmind to crash. (CVE-2007-2442)

David Coffey also discovered an overflow flaw in the RPC library used
by kadmind. On Red Hat Enterprise Linux, exploitation of this flaw is
limited to a denial of service. A remote unauthenticated attacker who
can access kadmind could trigger this flaw and cause kadmind to crash.
(CVE-2007-2443)

A stack-based buffer overflow flaw was found in kadmind. An
authenticated attacker who can access kadmind could trigger this flaw
and potentially execute arbitrary code on the Kerberos server.
(CVE-2007-2798)

Users of krb5-server are advised to update to these erratum packages
which contain backported fixes to correct these issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2007-June/000251.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2007-June/000253.html"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected krb5 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:ND/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_cwe_id(119);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:krb5-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:krb5-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:krb5-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:krb5-workstation");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:4");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:5");

  script_set_attribute(attribute:"patch_publication_date", value:"2007/06/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/07/12");
  script_set_attribute(attribute:"vuln_publication_date", value:"2007/06/26");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2015 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:"^(4|5)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 4 / 5", "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 && "ia64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu);

flag = 0;
if (rpm_check(release:"EL4", cpu:"i386", reference:"krb5-devel-1.3.4-49")) flag++;
if (rpm_check(release:"EL4", cpu:"x86_64", reference:"krb5-devel-1.3.4-49")) flag++;
if (rpm_check(release:"EL4", cpu:"i386", reference:"krb5-libs-1.3.4-49")) flag++;
if (rpm_check(release:"EL4", cpu:"x86_64", reference:"krb5-libs-1.3.4-49")) flag++;
if (rpm_check(release:"EL4", cpu:"i386", reference:"krb5-server-1.3.4-49")) flag++;
if (rpm_check(release:"EL4", cpu:"x86_64", reference:"krb5-server-1.3.4-49")) flag++;
if (rpm_check(release:"EL4", cpu:"i386", reference:"krb5-workstation-1.3.4-49")) flag++;
if (rpm_check(release:"EL4", cpu:"x86_64", reference:"krb5-workstation-1.3.4-49")) flag++;

if (rpm_check(release:"EL5", reference:"krb5-devel-1.5-26")) flag++;
if (rpm_check(release:"EL5", reference:"krb5-libs-1.5-26")) flag++;
if (rpm_check(release:"EL5", reference:"krb5-server-1.5-26")) flag++;
if (rpm_check(release:"EL5", reference:"krb5-workstation-1.5-26")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "krb5-devel / krb5-libs / krb5-server / krb5-workstation");
}