RedHat Update for krb5 RHSA-2016:0532-01

# SPDX-FileCopyrightText: 2016 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.871591");
  script_version("2024-03-21T05:06:54+0000");
  script_tag(name:"last_modification", value:"2024-03-21 05:06:54 +0000 (Thu, 21 Mar 2024)");
  script_tag(name:"creation_date", value:"2016-04-02 05:17:42 +0200 (Sat, 02 Apr 2016)");
  script_cve_id("CVE-2015-8629", "CVE-2015-8630", "CVE-2015-8631");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-01-21 15:47:00 +0000 (Tue, 21 Jan 2020)");
  script_tag(name:"qod_type", value:"package");
  script_name("RedHat Update for krb5 RHSA-2016:0532-01");
  script_tag(name:"summary", value:"The remote host is missing an update for the 'krb5'
  package(s) announced via the referenced advisory.");
  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
  script_tag(name:"insight", value:"Kerberos is a network authentication system,
which can improve the security of your network by eliminating the insecure practice
of sending passwords over the network in unencrypted form. It allows clients and
servers to authenticate to each other with the help of a trusted third party, the
Kerberos key distribution center (KDC).

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)

The CVE-2015-8631 issue was discovered by Simo Sorce of Red Hat.");
  script_tag(name:"affected", value:"krb5 on Red Hat Enterprise Linux Server (v. 7)");
  script_tag(name:"solution", value:"Please Install the Updated Packages.");

  script_xref(name:"RHSA", value:"2016:0532-01");
  script_xref(name:"URL", value:"https://www.redhat.com/archives/rhsa-announce/2016-April/msg00000.html");
  script_tag(name:"solution_type", value:"VendorFix");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("Red Hat Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/rhel", "ssh/login/rpms", re:"ssh/login/release=RHENT_7");

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-rpm.inc");

release = rpm_get_ssh_release();
if(!release) exit(0);

res = "";

if(release == "RHENT_7")
{

  if ((res = isrpmvuln(pkg:"krb5-debuginfo", rpm:"krb5-debuginfo~1.13.2~12.el7_2", rls:"RHENT_7")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if ((res = isrpmvuln(pkg:"krb5-devel", rpm:"krb5-devel~1.13.2~12.el7_2", rls:"RHENT_7")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if ((res = isrpmvuln(pkg:"krb5-libs", rpm:"krb5-libs~1.13.2~12.el7_2", rls:"RHENT_7")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if ((res = isrpmvuln(pkg:"krb5-pkinit", rpm:"krb5-pkinit~1.13.2~12.el7_2", rls:"RHENT_7")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if ((res = isrpmvuln(pkg:"krb5-server", rpm:"krb5-server~1.13.2~12.el7_2", rls:"RHENT_7")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if ((res = isrpmvuln(pkg:"krb5-server-ldap", rpm:"krb5-server-ldap~1.13.2~12.el7_2", rls:"RHENT_7")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if ((res = isrpmvuln(pkg:"krb5-workstation", rpm:"krb5-workstation~1.13.2~12.el7_2", rls:"RHENT_7")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if (__pkg_match) exit(99);
  exit(0);
}