RHEL 2.1 / 3 / 4 : openssl (RHSA-2006:0661)

2006-09-12T00:00:00
ID REDHAT-RHSA-2006-0661.NASL
Type nessus
Reporter Tenable
Modified 2016-12-29T00:00:00

Description

Updated OpenSSL packages are now available to correct a security issue.

This update has been rated as having important security impact by the Red Hat Security Response Team.

The OpenSSL toolkit provides support for secure communications between machines. OpenSSL includes a certificate management tool and shared libraries which provide various cryptographic algorithms and protocols.

Daniel Bleichenbacher recently described an attack on PKCS #1 v1.5 signatures. Where an RSA key with exponent 3 is used it may be possible for an attacker to forge a PKCS #1 v1.5 signature that would be incorrectly verified by implementations that do not check for excess data in the RSA exponentiation result of the signature.

The Google Security Team discovered that OpenSSL is vulnerable to this attack. This issue affects applications that use OpenSSL to verify X.509 certificates as well as other uses of PKCS #1 v1.5. (CVE-2006-4339)

This errata also resolves a problem where a customized ca-bundle.crt file was overwritten when the openssl package was upgraded.

Users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.

Note: After installing this update, users are advised to either restart all services that use OpenSSL or restart their system.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2006:0661. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(22331);
  script_version ("$Revision: 1.21 $");
  script_cvs_date("$Date: 2016/12/29 15:35:19 $");

  script_cve_id("CVE-2006-4339");
  script_bugtraq_id(19849);
  script_osvdb_id(28549);
  script_xref(name:"RHSA", value:"2006:0661");

  script_name(english:"RHEL 2.1 / 3 / 4 : openssl (RHSA-2006:0661)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated OpenSSL packages are now available to correct a security
issue.

This update has been rated as having important security impact by the
Red Hat Security Response Team.

The OpenSSL toolkit provides support for secure communications between
machines. OpenSSL includes a certificate management tool and shared
libraries which provide various cryptographic algorithms and
protocols.

Daniel Bleichenbacher recently described an attack on PKCS #1 v1.5
signatures. Where an RSA key with exponent 3 is used it may be
possible for an attacker to forge a PKCS #1 v1.5 signature that would
be incorrectly verified by implementations that do not check for
excess data in the RSA exponentiation result of the signature.

The Google Security Team discovered that OpenSSL is vulnerable to this
attack. This issue affects applications that use OpenSSL to verify
X.509 certificates as well as other uses of PKCS #1 v1.5.
(CVE-2006-4339)

This errata also resolves a problem where a customized ca-bundle.crt
file was overwritten when the openssl package was upgraded.

Users are advised to upgrade to these updated packages, which contain
a backported patch to correct this issue.

Note: After installing this update, users are advised to either
restart all services that use OpenSSL or restart their system."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.redhat.com/security/data/cve/CVE-2006-4339.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.imc.org/ietf-openpgp/mail-archive/msg14307.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.openssl.org/news/secadv/20060905.txt"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://rhn.redhat.com/errata/RHSA-2006-0661.html"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:ND/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(310);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssl-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssl-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssl095a");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssl096");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:openssl096b");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:2.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4");

  script_set_attribute(attribute:"patch_publication_date", value:"2006/09/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/09/12");
  script_set_attribute(attribute:"vuln_publication_date", value:"2006/09/05");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2006-2016 Tenable Network Security, Inc.");
  script_family(english:"Red Hat Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  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) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = eregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! ereg(pattern:"^(2\.1|3|4)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 2.1 / 3.x / 4.x", "Red Hat " + 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 ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2006:0661";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"openssl-0.9.6b-43")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i686", reference:"openssl-0.9.6b-43")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"openssl-devel-0.9.6b-43")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"openssl-perl-0.9.6b-43")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"openssl095a-0.9.5a-29")) flag++;
  if (rpm_check(release:"RHEL2.1", cpu:"i386", reference:"openssl096-0.9.6-29")) flag++;

  if (rpm_check(release:"RHEL3", reference:"openssl-0.9.7a-33.18")) flag++;
  if (rpm_check(release:"RHEL3", reference:"openssl-devel-0.9.7a-33.18")) flag++;
  if (rpm_check(release:"RHEL3", reference:"openssl-perl-0.9.7a-33.18")) flag++;
  if (rpm_check(release:"RHEL3", cpu:"i386", reference:"openssl096b-0.9.6b-16.43")) flag++;
  if (rpm_check(release:"RHEL3", cpu:"s390", reference:"openssl096b-0.9.6b-16.43")) flag++;
  if (rpm_check(release:"RHEL3", cpu:"x86_64", reference:"openssl096b-0.9.6b-16.43")) flag++;

  if (rpm_check(release:"RHEL4", reference:"openssl-0.9.7a-43.11")) flag++;
  if (rpm_check(release:"RHEL4", reference:"openssl-devel-0.9.7a-43.11")) flag++;
  if (rpm_check(release:"RHEL4", reference:"openssl-perl-0.9.7a-43.11")) flag++;
  if (rpm_check(release:"RHEL4", cpu:"i386", reference:"openssl096b-0.9.6b-22.43")) flag++;
  if (rpm_check(release:"RHEL4", cpu:"s390", reference:"openssl096b-0.9.6b-22.43")) flag++;
  if (rpm_check(release:"RHEL4", cpu:"x86_64", reference:"openssl096b-0.9.6b-22.43")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "openssl / openssl-devel / openssl-perl / openssl095a / openssl096 / etc");
  }
}