Mandriva Linux Security Advisory : krb5 (MDVSA-2008:070)

2009-04-23T00:00:00
ID MANDRIVA_MDVSA-2008-070.NASL
Type nessus
Reporter Tenable
Modified 2018-07-19T00:00:00

Description

A memory management flaw was found in the GSSAPI library used by Kerberos that could result in an attempt to free already freed memory, possibly leading to a crash or allowing the execution of arbitrary code (CVE-2007-5971).

A flaw was discovered in how the Kerberos krb5kdc handled Kerberos v4 protocol packets. An unauthenticated remote attacker could use this flaw to crash the krb5kdc daemon, disclose portions of its memory, or possibly %execute arbitrary code using malformed or truncated Kerberos v4 protocol requests (CVE-2008-0062, CVE-2008-0063).

This issue only affects krb5kdc when it has Kerberos v4 protocol compatibility enabled, which is a compiled-in default in all Kerberos versions that Mandriva Linux ships prior to Mandriva Linux 2008.0. Kerberos v4 protocol support can be disabled by adding v4_mode=none (without quotes) to the [kdcdefaults] section of /etc/kerberos/krb5kdc/kdc.conf.

A flaw in the RPC library as used in Kerberos' kadmind was discovered by Jeff Altman of Secure Endpoints. An unauthenticated remote attacker could use this vulnerability to crash kadmind or possibly execute arbitrary code in systems with certain resource limits configured; this does not affect the default resource limits used by Mandriva Linux (CVE-2008-0947).

The updated packages have been patched to correct these issues.

                                        
                                            #%NASL_MIN_LEVEL 70103

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Mandriva Linux Security Advisory MDVSA-2008:070. 
# The text itself is copyright (C) Mandriva S.A.
#

include("compat.inc");

if (description)
{
  script_id(37527);
  script_version ("1.17");
  script_cvs_date("Date: 2018/07/19 20:59:15");

  script_cve_id("CVE-2007-5971", "CVE-2008-0062", "CVE-2008-0063", "CVE-2008-0947");
  script_xref(name:"MDVSA", value:"2008:070");

  script_name(english:"Mandriva Linux Security Advisory : krb5 (MDVSA-2008:070)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Mandriva Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A memory management flaw was found in the GSSAPI library used by
Kerberos that could result in an attempt to free already freed memory,
possibly leading to a crash or allowing the execution of arbitrary
code (CVE-2007-5971).

A flaw was discovered in how the Kerberos krb5kdc handled Kerberos v4
protocol packets. An unauthenticated remote attacker could use this
flaw to crash the krb5kdc daemon, disclose portions of its memory, or
possibly %execute arbitrary code using malformed or truncated Kerberos
v4 protocol requests (CVE-2008-0062, CVE-2008-0063).

This issue only affects krb5kdc when it has Kerberos v4 protocol
compatibility enabled, which is a compiled-in default in all Kerberos
versions that Mandriva Linux ships prior to Mandriva Linux 2008.0.
Kerberos v4 protocol support can be disabled by adding v4_mode=none
(without quotes) to the [kdcdefaults] section of
/etc/kerberos/krb5kdc/kdc.conf.

A flaw in the RPC library as used in Kerberos' kadmind was discovered
by Jeff Altman of Secure Endpoints. An unauthenticated remote attacker
could use this vulnerability to crash kadmind or possibly execute
arbitrary code in systems with certain resource limits configured;
this does not affect the default resource limits used by Mandriva
Linux (CVE-2008-0947).

The updated packages have been patched to correct these issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2008-001.txt"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2008-002.txt"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_cwe_id(119, 189, 399);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:ftp-client-krb5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:ftp-server-krb5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:krb5-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:krb5-workstation");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64krb53");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64krb53-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:libkrb53");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:libkrb53-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:telnet-client-krb5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:telnet-server-krb5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:linux:2007");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/03/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2009/04/23");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2009-2018 Tenable Network Security, Inc.");
  script_family(english:"Mandriva Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/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/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux");
if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu);


flag = 0;
if (rpm_check(release:"MDK2007.0", reference:"ftp-client-krb5-1.4.3-7.4mdv2007.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.0", reference:"ftp-server-krb5-1.4.3-7.4mdv2007.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.0", reference:"krb5-server-1.4.3-7.4mdv2007.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.0", reference:"krb5-workstation-1.4.3-7.4mdv2007.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.0", cpu:"x86_64", reference:"lib64krb53-1.4.3-7.4mdv2007.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.0", cpu:"x86_64", reference:"lib64krb53-devel-1.4.3-7.4mdv2007.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.0", cpu:"i386", reference:"libkrb53-1.4.3-7.4mdv2007.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.0", cpu:"i386", reference:"libkrb53-devel-1.4.3-7.4mdv2007.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.0", reference:"telnet-client-krb5-1.4.3-7.4mdv2007.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.0", reference:"telnet-server-krb5-1.4.3-7.4mdv2007.0", yank:"mdv")) flag++;


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