RHEL 2.1 / 3 / 4 : gnupg (RHSA-2007:0106)

2007-03-06T00:00:00
ID REDHAT-RHSA-2007-0106.NASL
Type nessus
Reporter Tenable
Modified 2016-12-29T00:00:00

Description

Updated GnuPG packages that fix a security issue are now available.

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

GnuPG is a utility for encrypting data and creating digital signatures.

Gerardo Richarte discovered that a number of applications that make use of GnuPG are prone to a vulnerability involving incorrect verification of signatures and encryption. An attacker could add arbitrary content to a signed message in such a way that a receiver of the message would not be able to distinguish between the properly signed parts of a message and the forged, unsigned, parts. (CVE-2007-1263)

Whilst this is not a vulnerability in GnuPG itself, the GnuPG team have produced a patch to protect against messages with multiple plaintext packets. Users should update to these erratum packages which contain the backported patch for this issue.

Red Hat would like to thank Core Security Technologies for reporting this issue.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2007:0106. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(24775);
  script_version ("$Revision: 1.17 $");
  script_cvs_date("$Date: 2016/12/29 15:35:20 $");

  script_cve_id("CVE-2007-1263");
  script_bugtraq_id(22757);
  script_osvdb_id(33502);
  script_xref(name:"RHSA", value:"2007:0106");

  script_name(english:"RHEL 2.1 / 3 / 4 : gnupg (RHSA-2007:0106)");
  script_summary(english:"Checks the rpm output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated GnuPG packages that fix a security issue are now available.

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

GnuPG is a utility for encrypting data and creating digital
signatures.

Gerardo Richarte discovered that a number of applications that make
use of GnuPG are prone to a vulnerability involving incorrect
verification of signatures and encryption. An attacker could add
arbitrary content to a signed message in such a way that a receiver of
the message would not be able to distinguish between the properly
signed parts of a message and the forged, unsigned, parts.
(CVE-2007-1263)

Whilst this is not a vulnerability in GnuPG itself, the GnuPG team
have produced a patch to protect against messages with multiple
plaintext packets. Users should update to these erratum packages which
contain the backported patch for this issue.

Red Hat would like to thank Core Security Technologies for reporting
this issue."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.redhat.com/security/data/cve/CVE-2007-1263.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://rhn.redhat.com/errata/RHSA-2007-0106.html"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected gnupg package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:ND/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gnupg");
  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:"2007/03/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/03/06");
  script_set_attribute(attribute:"vuln_publication_date", value:"2007/03/05");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2007-2016 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-2007:0106";
  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:"gnupg-1.0.7-21")) flag++;

  if (rpm_check(release:"RHEL3", reference:"gnupg-1.2.1-20")) flag++;

  if (rpm_check(release:"RHEL4", reference:"gnupg-1.2.6-9")) 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, "gnupg");
  }
}