Scientific Linux Security Update : pam_krb5 on SL5.x i386/x86_64

#%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(60772);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2009-1384");

  script_name(english:"Scientific Linux Security Update : pam_krb5 on SL5.x i386/x86_64");
  script_summary(english:"Checks rpm output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Scientific Linux host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A flaw was found in pam_krb5. In some non-default configurations
(specifically, those where pam_krb5 would be the first module to
prompt for a password), the text of the password prompt varied based
on whether or not the username provided was a username known to the
system. A remote attacker could use this flaw to recognize valid
usernames, which would aid a dictionary-based password guess attack.
(CVE-2009-1384)

This update also fixes the following bugs :

  - certain applications which do not properly implement PAM
    conversations may fail to authenticate users whose
    passwords have expired and must be changed, or may
    succeed without forcing the user's password to be
    changed. This bug is triggered by a previously-applied
    fix to pam_krb5 which makes it comply more closely to
    PAM specifications. If an application misbehaves,
    enabling the 'chpw_prompt' option for its service should
    restore the old behavior. (BZ#509092)

  - pam_krb5 does not allow the user to change an expired
    password in cases where the Key Distribution Center
    (KDC) is configured to refuse attempts to obtain
    forwardable password-changing credentials. This update
    fixes this issue. (BZ#489015)

  - failure to verify TGT because of wrong keytab handling.
    (BZ#450776)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=450776"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=489015"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=509092"
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind1004&L=scientific-linux-errata&T=0&P=2282
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?4f2b6498"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected pam_krb5 package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_cwe_id(287);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2010/03/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/08/01");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2012-2021 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("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");
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);


flag = 0;
if (rpm_check(release:"SL5", reference:"pam_krb5-2.2.14-15")) flag++;


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