CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:S/C:C/I:C/A:C
EPSS
Percentile
99.1%
It was found that if a KDC served multiple realms, certain requests could cause the setup_server_realm() function to dereference a NULL pointer. A remote, unauthenticated attacker could use this flaw to crash the KDC using a specially crafted request. (CVE-2013-1418 , CVE-2013-6800)
A NULL pointer dereference flaw was found in the MIT Kerberos SPNEGO acceptor for continuation tokens. A remote, unauthenticated attacker could use this flaw to crash a GSSAPI-enabled server application.
(CVE-2014-4344)
A buffer overflow was found in the KADM5 administration server (kadmind) when it was used with an LDAP back end for the KDC database.
A remote, authenticated attacker could potentially use this flaw to execute arbitrary code on the system running kadmind. (CVE-2014-4345)
Two buffer over-read flaws were found in the way MIT Kerberos handled certain requests. A remote, unauthenticated attacker who is able to inject packets into a client or server application’s GSSAPI session could use either of these flaws to crash the application.
(CVE-2014-4341 , CVE-2014-4342)
A double-free flaw was found in the MIT Kerberos SPNEGO initiators. An attacker able to spoof packets to appear as though they are from an GSSAPI acceptor could use this flaw to crash a client application that uses MIT Kerberos. (CVE-2014-4343)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2014-443.
#
include("compat.inc");
if (description)
{
script_id(79292);
script_version("1.7");
script_cvs_date("Date: 2018/04/18 15:09:35");
script_cve_id("CVE-2013-1418", "CVE-2013-6800", "CVE-2014-4341", "CVE-2014-4342", "CVE-2014-4343", "CVE-2014-4344", "CVE-2014-4345");
script_xref(name:"ALAS", value:"2014-443");
script_xref(name:"RHSA", value:"2014:1389");
script_name(english:"Amazon Linux AMI : krb5 (ALAS-2014-443)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote Amazon Linux AMI host is missing a security update."
);
script_set_attribute(
attribute:"description",
value:
"It was found that if a KDC served multiple realms, certain requests
could cause the setup_server_realm() function to dereference a NULL
pointer. A remote, unauthenticated attacker could use this flaw to
crash the KDC using a specially crafted request. (CVE-2013-1418 ,
CVE-2013-6800)
A NULL pointer dereference flaw was found in the MIT Kerberos SPNEGO
acceptor for continuation tokens. A remote, unauthenticated attacker
could use this flaw to crash a GSSAPI-enabled server application.
(CVE-2014-4344)
A buffer overflow was found in the KADM5 administration server
(kadmind) when it was used with an LDAP back end for the KDC database.
A remote, authenticated attacker could potentially use this flaw to
execute arbitrary code on the system running kadmind. (CVE-2014-4345)
Two buffer over-read flaws were found in the way MIT Kerberos handled
certain requests. A remote, unauthenticated attacker who is able to
inject packets into a client or server application's GSSAPI session
could use either of these flaws to crash the application.
(CVE-2014-4341 , CVE-2014-4342)
A double-free flaw was found in the MIT Kerberos SPNEGO initiators. An
attacker able to spoof packets to appear as though they are from an
GSSAPI acceptor could use this flaw to crash a client application that
uses MIT Kerberos. (CVE-2014-4343)"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2014-443.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update krb5' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:krb5-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:krb5-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:krb5-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:krb5-pkinit-openssl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:krb5-server");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:krb5-server-ldap");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:krb5-workstation");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"patch_publication_date", value:"2014/11/11");
script_set_attribute(attribute:"plugin_publication_date", value:"2014/11/18");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2014-2018 Tenable Network Security, Inc.");
script_family(english:"Amazon Linux Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/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/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "A")
{
if (os_ver == 'A') os_ver = 'AMI';
audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (rpm_check(release:"ALA", reference:"krb5-debuginfo-1.10.3-33.28.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"krb5-devel-1.10.3-33.28.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"krb5-libs-1.10.3-33.28.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"krb5-pkinit-openssl-1.10.3-33.28.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"krb5-server-1.10.3-33.28.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"krb5-server-ldap-1.10.3-33.28.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"krb5-workstation-1.10.3-33.28.amzn1")) 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-debuginfo / krb5-devel / krb5-libs / krb5-pkinit-openssl / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | krb5-debuginfo | p-cpe:/a:amazon:linux:krb5-debuginfo |
amazon | linux | krb5-devel | p-cpe:/a:amazon:linux:krb5-devel |
amazon | linux | krb5-libs | p-cpe:/a:amazon:linux:krb5-libs |
amazon | linux | krb5-pkinit-openssl | p-cpe:/a:amazon:linux:krb5-pkinit-openssl |
amazon | linux | krb5-server | p-cpe:/a:amazon:linux:krb5-server |
amazon | linux | krb5-server-ldap | p-cpe:/a:amazon:linux:krb5-server-ldap |
amazon | linux | krb5-workstation | p-cpe:/a:amazon:linux:krb5-workstation |
amazon | linux | cpe:/o:amazon:linux |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-1418
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6800
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4341
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4342
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4343
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4344
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4345
alas.aws.amazon.com/ALAS-2014-443.html