Vulnerabilities > CVE-2008-2420 - Permissions, Privileges, and Access Controls vulnerability in Stunnel

047910
CVSS 6.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
stunnel
CWE-264
nessus
NVD
Published: 2008-05-23
Updated: 2017-08-08

Summary

The OCSP functionality in stunnel before 4.24 does not properly search certificate revocation lists (CRL), which allows remote attackers to bypass intended access restrictions by using revoked certificates.

Vulnerable Configurations

Part Description Count
Application
Stunnel
54

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2008-4606.NASL
    descriptionNew upstream release 4.24 fixing security issue in certificate verification via OCSP protocol: http://stunnel.mirt.net/pipermail/stunnel- announce/2008-May/000035.html Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id32468
    published2008-05-29
    reporterThis script is Copyright (C) 2008-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/32468
    titleFedora 7 : stunnel-4.24-0.fc7 (2008-4606)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory 2008-4606.
#

include("compat.inc");

if (description)
{
  script_id(32468);
  script_version ("1.14");
  script_cvs_date("Date: 2019/08/02 13:32:27");

  script_cve_id("CVE-2008-2420");
  script_xref(name:"FEDORA", value:"2008-4606");

  script_name(english:"Fedora 7 : stunnel-4.24-0.fc7 (2008-4606)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"New upstream release 4.24 fixing security issue in certificate
verification via OCSP protocol:
http://stunnel.mirt.net/pipermail/stunnel-
announce/2008-May/000035.html

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  # http://stunnel.mirt.net/pipermail/stunnel-
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.stunnel.org/pipermail/stunnel-"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=448290"
  );
  # https://lists.fedoraproject.org/pipermail/package-announce/2008-May/010594.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?ca70b5f8"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected stunnel package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_cwe_id(264);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:stunnel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:7");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/05/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/05/29");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2008-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "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) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 7.x", "Fedora " + 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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);

flag = 0;
if (rpm_check(release:"FC7", reference:"stunnel-4.24-0.fc7")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "stunnel");
}
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2008-4579.NASL
    descriptionNew upstream release 4.24 fixing security issue in certificate verification via OCSP protocol: http://stunnel.mirt.net/pipermail/stunnel- announce/2008-May/000035.html Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id32466
    published2008-05-29
    reporterThis script is Copyright (C) 2008-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/32466
    titleFedora 8 : stunnel-4.24-0.fc8 (2008-4579)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory 2008-4579.
#

include("compat.inc");

if (description)
{
  script_id(32466);
  script_version ("1.14");
  script_cvs_date("Date: 2019/08/02 13:32:27");

  script_cve_id("CVE-2008-2420");
  script_xref(name:"FEDORA", value:"2008-4579");

  script_name(english:"Fedora 8 : stunnel-4.24-0.fc8 (2008-4579)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"New upstream release 4.24 fixing security issue in certificate
verification via OCSP protocol:
http://stunnel.mirt.net/pipermail/stunnel-
announce/2008-May/000035.html

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  # http://stunnel.mirt.net/pipermail/stunnel-
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.stunnel.org/pipermail/stunnel-"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=448290"
  );
  # https://lists.fedoraproject.org/pipermail/package-announce/2008-May/010559.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?98abd49c"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected stunnel package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_cwe_id(264);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:stunnel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:8");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/05/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/05/29");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2008-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "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) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 8.x", "Fedora " + 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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);

flag = 0;
if (rpm_check(release:"FC8", reference:"stunnel-4.24-0.fc8")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "stunnel");
}
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-200808-08.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-200808-08 (stunnel: Security bypass) An unspecified bug in the OCSP search functionality of stunnel has been discovered. Impact : A remote attacker can use a revoked certificate that would be successfully authenticated by stunnel. This issue only concerns the users who have enabled the OCSP validation in stunnel. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id33854
    published2008-08-10
    reporterThis script is Copyright (C) 2008-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/33854
    titleGLSA-200808-08 : stunnel: Security bypass
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200808-08.
#
# The advisory text is Copyright (C) 2001-2015 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(33854);
  script_version("1.15");
  script_cvs_date("Date: 2019/08/02 13:32:45");

  script_cve_id("CVE-2008-2420");
  script_xref(name:"GLSA", value:"200808-08");

  script_name(english:"GLSA-200808-08 : stunnel: Security bypass");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-200808-08
(stunnel: Security bypass)

    An unspecified bug in the OCSP search functionality of stunnel has been
    discovered.
  
Impact :

    A remote attacker can use a revoked certificate that would be
    successfully authenticated by stunnel. This issue only concerns the
    users who have enabled the OCSP validation in stunnel.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200808-08"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All stunnel users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=net-misc/stunnel-4.24'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_cwe_id(264);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:stunnel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/08/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/08/10");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2008-2019 Tenable Network Security, Inc.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"net-misc/stunnel", unaffected:make_list("ge 4.24", "lt 4"), vulnerable:make_list("lt 4.24"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:qpkg_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "stunnel");
}
  • NASL familyMandriva Local Security Checks
    NASL idMANDRIVA_MDVSA-2008-168.NASL
    descriptionA vulnerability was found in the OCSP search functionality in stunnel that could allow a remote attacker to use a revoked certificate that would be successfully authenticated by stunnel (CVE-2008-2420). This flaw only concerns users who have enabled OCSP validation in stunnel. The updated packages have been patched to correct this issue.
    last seen2020-06-01
    modified2020-06-02
    plugin id38063
    published2009-04-23
    reporterThis script is Copyright (C) 2009-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/38063
    titleMandriva Linux Security Advisory : stunnel (MDVSA-2008:168)
    code
    #%NASL_MIN_LEVEL 80502

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Mandriva Linux Security Advisory MDVSA-2008:168. 
# The text itself is copyright (C) Mandriva S.A.
#

include("compat.inc");

if (description)
{
  script_id(38063);
  script_version ("1.12");
  script_cvs_date("Date: 2019/08/02 13:32:50");

  script_cve_id("CVE-2008-2420");
  script_xref(name:"MDVSA", value:"2008:168");

  script_name(english:"Mandriva Linux Security Advisory : stunnel (MDVSA-2008:168)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Mandriva Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A vulnerability was found in the OCSP search functionality in stunnel
that could allow a remote attacker to use a revoked certificate that
would be successfully authenticated by stunnel (CVE-2008-2420). This
flaw only concerns users who have enabled OCSP validation in stunnel.

The updated packages have been patched to correct this issue."
  );
  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:P/A:P");
  script_cwe_id(264);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64stunnel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64stunnel-static-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64stunnel0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64stunnel0-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:libstunnel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:libstunnel-static-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:libstunnel0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:libstunnel0-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:stunnel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:linux:2007.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:linux:2008.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:linux:2008.1");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/08/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2009/04/23");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2009-2019 Tenable Network Security, Inc.");
  script_family(english:"Mandriva Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/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);
if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux");
if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu);


flag = 0;
if (rpm_check(release:"MDK2007.1", cpu:"x86_64", reference:"lib64stunnel0-4.20-1.1mdv2007.1", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.1", cpu:"x86_64", reference:"lib64stunnel0-devel-4.20-1.1mdv2007.1", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.1", cpu:"i386", reference:"libstunnel0-4.20-1.1mdv2007.1", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.1", cpu:"i386", reference:"libstunnel0-devel-4.20-1.1mdv2007.1", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.1", reference:"stunnel-4.20-1.1mdv2007.1", yank:"mdv")) flag++;

if (rpm_check(release:"MDK2008.0", cpu:"x86_64", reference:"lib64stunnel0-4.20-1.1mdv2008.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.0", cpu:"x86_64", reference:"lib64stunnel0-devel-4.20-1.1mdv2008.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.0", cpu:"i386", reference:"libstunnel0-4.20-1.1mdv2008.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.0", cpu:"i386", reference:"libstunnel0-devel-4.20-1.1mdv2008.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.0", reference:"stunnel-4.20-1.1mdv2008.0", yank:"mdv")) flag++;

if (rpm_check(release:"MDK2008.1", cpu:"x86_64", reference:"lib64stunnel-devel-4.21-2.1mdv2008.1", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.1", cpu:"x86_64", reference:"lib64stunnel-static-devel-4.21-2.1mdv2008.1", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.1", cpu:"x86_64", reference:"lib64stunnel0-4.21-2.1mdv2008.1", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.1", cpu:"i386", reference:"libstunnel-devel-4.21-2.1mdv2008.1", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.1", cpu:"i386", reference:"libstunnel-static-devel-4.21-2.1mdv2008.1", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.1", cpu:"i386", reference:"libstunnel0-4.21-2.1mdv2008.1", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2008.1", reference:"stunnel-4.21-2.1mdv2008.1", yank:"mdv")) 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");
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2008-4531.NASL
    descriptionNew upstream release 4.24 fixing security issue in certificate verification via OCSP protocol: http://stunnel.mirt.net/pipermail/stunnel- announce/2008-May/000035.html Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id32465
    published2008-05-29
    reporterThis script is Copyright (C) 2008-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/32465
    titleFedora 9 : stunnel-4.24-1.fc9 (2008-4531)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory 2008-4531.
#

include("compat.inc");

if (description)
{
  script_id(32465);
  script_version ("1.14");
  script_cvs_date("Date: 2019/08/02 13:32:27");

  script_cve_id("CVE-2008-2420");
  script_xref(name:"FEDORA", value:"2008-4531");

  script_name(english:"Fedora 9 : stunnel-4.24-1.fc9 (2008-4531)");
  script_summary(english:"Checks rpm output for the updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Fedora host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"New upstream release 4.24 fixing security issue in certificate
verification via OCSP protocol:
http://stunnel.mirt.net/pipermail/stunnel-
announce/2008-May/000035.html

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  # http://stunnel.mirt.net/pipermail/stunnel-
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.stunnel.org/pipermail/stunnel-"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=448290"
  );
  # https://lists.fedoraproject.org/pipermail/package-announce/2008-May/010508.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?e7732f0b"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected stunnel package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_cwe_id(264);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:stunnel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:9");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/05/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/05/29");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2008-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Fedora Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "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) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! ereg(pattern:"^9([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 9.x", "Fedora " + 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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);

flag = 0;
if (rpm_check(release:"FC9", reference:"stunnel-4.24-1.fc9")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "stunnel");
}

Statements

contributorMark J Cox
lastmodified2008-05-26
organizationRed Hat
statementNot vulnerable. OCSP protocol support was only implemented in upstream stunnel version 4.16. Therefore OCSP protocol is not available in the versions of stunnel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, or 5.

References