CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
94.1%
Security Fix(es) :
A memory leak flaw was found in the krb5_unparse_name() function of the MIT Kerberos kadmind service. An authenticated attacker could repeatedly send specially crafted requests to the server, which could cause the server to consume large amounts of memory resources, ultimately leading to a denial of service due to memory exhaustion. (CVE-2015-8631)
An out-of-bounds read flaw was found in the kadmind service of MIT Kerberos. An authenticated attacker could send a maliciously crafted message to force kadmind to read beyond the end of allocated memory, and write the memory contents to the KDC database if the attacker has write permission, leading to information disclosure.
(CVE-2015-8629)
A NULL pointer dereference flaw was found in the procedure used by the MIT Kerberos kadmind service to store policies: the kadm5_create_principal_3() and kadm5_modify_principal() function did not ensure that a policy was given when KADM5_POLICY was set. An authenticated attacker with permissions to modify the database could use this flaw to add or modify a principal with a policy set to NULL, causing the kadmind service to crash. (CVE-2015-8630)
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(90344);
script_version("2.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id("CVE-2015-8629", "CVE-2015-8630", "CVE-2015-8631");
script_name(english:"Scientific Linux Security Update : krb5 on SL7.x x86_64 (20160404)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:
"The remote Scientific Linux host is missing one or more security
updates."
);
script_set_attribute(
attribute:"description",
value:
"Security Fix(es) :
- A memory leak flaw was found in the krb5_unparse_name()
function of the MIT Kerberos kadmind service. An
authenticated attacker could repeatedly send specially
crafted requests to the server, which could cause the
server to consume large amounts of memory resources,
ultimately leading to a denial of service due to memory
exhaustion. (CVE-2015-8631)
- An out-of-bounds read flaw was found in the kadmind
service of MIT Kerberos. An authenticated attacker could
send a maliciously crafted message to force kadmind to
read beyond the end of allocated memory, and write the
memory contents to the KDC database if the attacker has
write permission, leading to information disclosure.
(CVE-2015-8629)
- A NULL pointer dereference flaw was found in the
procedure used by the MIT Kerberos kadmind service to
store policies: the kadm5_create_principal_3() and
kadm5_modify_principal() function did not ensure that a
policy was given when KADM5_POLICY was set. An
authenticated attacker with permissions to modify the
database could use this flaw to add or modify a
principal with a policy set to NULL, causing the kadmind
service to crash. (CVE-2015-8630)"
);
# https://listserv.fnal.gov/scripts/wa.exe?A2=ind1604&L=scientific-linux-errata&F=&S=&P=76
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?1dbfa680"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:krb5-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:krb5-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:krb5-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:krb5-pkinit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:krb5-server");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:krb5-server-ldap");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:krb5-workstation");
script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");
script_set_attribute(attribute:"vuln_publication_date", value:"2016/02/13");
script_set_attribute(attribute:"patch_publication_date", value:"2016/04/04");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/04/05");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Scientific Linux Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/RedHat/release", "Host/RedHat/rpm-list");
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) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 7.x", "Scientific Linux " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);
flag = 0;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"krb5-debuginfo-1.13.2-12.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"krb5-devel-1.13.2-12.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"krb5-libs-1.13.2-12.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"krb5-pkinit-1.13.2-12.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"krb5-server-1.13.2-12.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"krb5-server-ldap-1.13.2-12.el7_2")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"krb5-workstation-1.13.2-12.el7_2")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get()
);
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 / krb5-server / etc");
}
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
94.1%