Vulnerabilities > CVE-2013-2944 - Improper Authentication vulnerability in Strongswan

047910
CVSS 0.0 - NONE
Attack vector
UNKNOWN
Attack complexity
UNKNOWN
Privileges required
UNKNOWN
Confidentiality impact
UNKNOWN
Integrity impact
UNKNOWN
Availability impact
UNKNOWN
strongswan
CWE-287
nessus
NVD
Published: 2013-05-02
Updated: 2023-11-07

Summary

strongSwan 4.3.5 through 5.0.3, when using the OpenSSL plugin for ECDSA signature verification, allows remote attackers to authenticate as other users via an invalid signature.

Vulnerable Configurations

Part Description Count
Application
Strongswan
17

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Authentication Abuse
    An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker. This attack may exploit assumptions made by the target's authentication procedures, such as assumptions regarding trust relationships or assumptions regarding the generation of secret values. This attack differs from Authentication Bypass attacks in that Authentication Abuse allows the attacker to be certified as a valid user through illegitimate means, while Authentication Bypass allows the user to access protected material without ever being certified as an authenticated user. This attack does not rely on prior sessions established by successfully authenticating users, as relied upon for the "Exploitation of Session Variables, Resource IDs and other Trusted Credentials" attack patterns.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Utilizing REST's Trust in the System Resource to Register Man in the Middle
    This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to place man in the middle once SSL is terminated. Rest applications premise is that they leverage existing infrastructure to deliver web services functionality. An example of this is a Rest application that uses HTTP Get methods and receives a HTTP response with an XML document. These Rest style web services are deployed on existing infrastructure such as Apache and IIS web servers with no SOAP stack required. Unfortunately from a security standpoint, there frequently is no interoperable identity security mechanism deployed, so Rest developers often fall back to SSL to deliver security. In large data centers, SSL is typically terminated at the edge of the network - at the firewall, load balancer, or router. Once the SSL is terminated the HTTP request is in the clear (unless developers have hashed or encrypted the values, but this is rare). The attacker can utilize a sniffer such as Wireshark to snapshot the credentials, such as username and password that are passed in the clear once SSL is terminated. Once the attacker gathers these credentials, they can submit requests to the web service provider just as authorized user do. There is not typically an authentication on the client side, beyond what is passed in the request itself so once this is compromised, then this is generally sufficient to compromise the service's authentication scheme.
  • Man in the Middle Attack
    This type of attack targets the communication between two components (typically client and server). The attacker places himself in the communication channel between the two components. Whenever one component attempts to communicate with the other (data flow, authentication challenges, etc.), the data first goes to the attacker, who has the opportunity to observe or alter it, and it is then passed on to the other component as if it was never intercepted. This interposition is transparent leaving the two compromised components unaware of the potential corruption or leakage of their communications. The potential for Man-in-the-Middle attacks yields an implicit lack of trust in communication or identify between two components.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idSUSE_11_STRONGSWAN-130416.NASL
    descriptionThis update fixes the ECDSA signature vulnerability in strongswan. CVE-2013-2944 has been assigned to this issue.
    last seen2020-06-05
    modified2013-07-24
    plugin id69030
    published2013-07-24
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/69030
    titleSuSE 11.2 Security Update : strongswan (SAT Patch Number 7638)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from SuSE 11 update information. The text itself is
# copyright (C) Novell, Inc.
#

if (NASL_LEVEL < 3000) exit(0);

include("compat.inc");

if (description)
{
  script_id(69030);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2013-2944");

  script_name(english:"SuSE 11.2 Security Update : strongswan (SAT Patch Number 7638)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SuSE 11 host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update fixes the ECDSA signature vulnerability in strongswan.
CVE-2013-2944 has been assigned to this issue."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=815236"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://support.novell.com/security/cve/CVE-2013-2944.html"
  );
  script_set_attribute(attribute:"solution", value:"Apply SAT patch number 7638.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:strongswan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:11:strongswan-doc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/04/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/07/24");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2020 Tenable Network Security, Inc.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/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/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)11") audit(AUDIT_OS_NOT, "SuSE 11");
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SuSE 11", cpu);

pl = get_kb_item("Host/SuSE/patchlevel");
if (isnull(pl) || int(pl) != 2) audit(AUDIT_OS_NOT, "SuSE 11.2");


flag = 0;
if (rpm_check(release:"SLED11", sp:2, cpu:"i586", reference:"strongswan-4.4.0-6.17.2")) flag++;
if (rpm_check(release:"SLED11", sp:2, cpu:"i586", reference:"strongswan-doc-4.4.0-6.17.2")) flag++;
if (rpm_check(release:"SLED11", sp:2, cpu:"x86_64", reference:"strongswan-4.4.0-6.17.2")) flag++;
if (rpm_check(release:"SLED11", sp:2, cpu:"x86_64", reference:"strongswan-doc-4.4.0-6.17.2")) flag++;
if (rpm_check(release:"SLES11", sp:2, reference:"strongswan-4.4.0-6.17.2")) flag++;
if (rpm_check(release:"SLES11", sp:2, reference:"strongswan-doc-4.4.0-6.17.2")) 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 familySuSE Local Security Checks
    NASL idOPENSUSE-2013-412.NASL
    description - Applied upstream patch for security vulnerability discovered by Kevin Wojtysiak in ECDSA signature verification of the strongswan openssl plugin (bnc#815236, CVE-2013-2944) [0003-Check-return-value-of-ECDSA_Verify-correctly.patch ]
    last seen2020-06-05
    modified2014-06-13
    plugin id74993
    published2014-06-13
    reporterThis script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/74993
    titleopenSUSE Security Update : strongswan (openSUSE-SU-2013:0873-1)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2013-412.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(74993);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2013-2944");

  script_name(english:"openSUSE Security Update : strongswan (openSUSE-SU-2013:0873-1)");
  script_summary(english:"Check for the openSUSE-2013-412 patch");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"  - Applied upstream patch for security vulnerability
    discovered by Kevin Wojtysiak in ECDSA signature
    verification of the strongswan openssl plugin
    (bnc#815236, CVE-2013-2944)
    [0003-Check-return-value-of-ECDSA_Verify-correctly.patch
    ]"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=815236"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.opensuse.org/opensuse-updates/2013-06/msg00010.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected strongswan packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:strongswan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:strongswan-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:strongswan-ipsec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:strongswan-ipsec-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:strongswan-libs0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:strongswan-libs0-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:strongswan-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:strongswan-mysql-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:strongswan-nm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:strongswan-nm-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:strongswan-sqlite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:strongswan-sqlite-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:12.3");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/04/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/06/13");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

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

  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/SuSE/release");
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
if (release !~ "^(SUSE12\.3)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "12.3", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE12.3", reference:"strongswan-5.0.1-4.4.1") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"strongswan-debugsource-5.0.1-4.4.1") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"strongswan-ipsec-5.0.1-4.4.1") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"strongswan-ipsec-debuginfo-5.0.1-4.4.1") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"strongswan-libs0-5.0.1-4.4.1") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"strongswan-libs0-debuginfo-5.0.1-4.4.1") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"strongswan-mysql-5.0.1-4.4.1") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"strongswan-mysql-debuginfo-5.0.1-4.4.1") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"strongswan-nm-5.0.1-4.4.1") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"strongswan-nm-debuginfo-5.0.1-4.4.1") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"strongswan-sqlite-5.0.1-4.4.1") ) flag++;
if ( rpm_check(release:"SUSE12.3", reference:"strongswan-sqlite-debuginfo-5.0.1-4.4.1") ) 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, "strongswan / strongswan-debugsource / strongswan-ipsec / etc");
}
  • NASL familySuSE Local Security Checks
    NASL idSUSE_STRONGSWAN-8546.NASL
    descriptionThis update fixes the ECDSA signature vulnerability in strongswan. CVE-2013-2944 was assigned to this issue.
    last seen2020-06-05
    modified2013-07-25
    plugin id69055
    published2013-07-25
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/69055
    titleSuSE 10 Security Update : strongswan (ZYPP Patch Number 8546)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2013-413.NASL
    description - Applied upstream patch for security vulnerability discovered by Kevin Wojtysiak in ECDSA signature verification of the strongswan openssl plugin (bnc#815236, CVE-2013-2944) [0003-Check-return-value-of-ECDSA_Verify-correctly.patch ]
    last seen2020-06-05
    modified2014-06-13
    plugin id74994
    published2014-06-13
    reporterThis script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/74994
    titleopenSUSE Security Update : strongswan (openSUSE-SU-2013:0775-1)
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201309-02.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201309-02 (strongSwan: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in strongSwan. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could use ECDSA to authenticate as another user with an invalid signature. Additionally, a remote attacker could send a specially crafted request, possibly resulting in a Denial of Service. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id69539
    published2013-09-02
    reporterThis script is Copyright (C) 2013-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/69539
    titleGLSA-201309-02 : strongSwan: Multiple vulnerabilities
  • NASL familySuSE Local Security Checks
    NASL idSUSE_11_STRONGSWAN-130701.NASL
    descriptionThis update fixes the ECDSA signature vulnerability in strongswan. CVE-2013-2944 was assigned to this issue.
    last seen2020-06-05
    modified2013-08-02
    plugin id69191
    published2013-08-02
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/69191
    titleSuSE 11.3 Security Update : strongswan (SAT Patch Number 8021)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2013-414.NASL
    description - Applied upstream patch for security vulnerability discovered by Kevin Wojtysiak in ECDSA signature verification of the strongswan openssl plugin (bnc#815236, CVE-2013-2944) [0003-Check-return-value-of-ECDSA_Verify-correctly.patch ]
    last seen2020-06-05
    modified2014-06-13
    plugin id74995
    published2014-06-13
    reporterThis script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/74995
    titleopenSUSE Security Update : strongswan (openSUSE-SU-2013:0774-1)
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_6FF570CBB41811E2B27920CF30E32F6D.NASL
    descriptionstrongSwan security team reports : If the openssl plugin is used for ECDSA signature verification an empty, zeroed or otherwise invalid signature is handled as a legitimate one. Both IKEv1 and IKEv2 are affected. Affected are only installations that have enabled and loaded the OpenSSL crypto backend (--enable-openssl). Builds using the default crypto backends are not affected.
    last seen2020-06-01
    modified2020-06-02
    plugin id66312
    published2013-05-04
    reporterThis script is Copyright (C) 2013-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/66312
    titleFreeBSD : strongSwan -- ECDSA signature verification issue (6ff570cb-b418-11e2-b279-20cf30e32f6d)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-2665.NASL
    descriptionKevin Wojtysiak discovered a vulnerability in strongSwan, an IPsec based VPN solution. When using the OpenSSL plugin for ECDSA based authentication, an empty, zeroed or otherwise invalid signature is handled as a legitimate one. An attacker could use a forged signature to authenticate like a legitimate user and gain access to the VPN (and everything protected by this). While the issue looks like CVE-2012-2388 (RSA signature based authentication bypass), it is unrelated.
    last seen2020-03-17
    modified2013-05-01
    plugin id66281
    published2013-05-01
    reporterThis script is Copyright (C) 2013-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/66281
    titleDebian DSA-2665-1 : strongswan - authentication bypass
  • NASL familySuSE Local Security Checks
    NASL idSUSE_11_STRONGSWAN-130702.NASL
    descriptionThis update fixes the ECDSA signature vulnerability in strongswan. CVE-2013-2944 was assigned to this issue.
    last seen2020-06-05
    modified2013-08-02
    plugin id69192
    published2013-08-02
    reporterThis script is Copyright (C) 2013-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/69192
    titleSuSE 11.3 Security Update : strongswan (SAT Patch Number 8021)

References