Vulnerabilities > CVE-2015-4171 - Information Exposure vulnerability in multiple products

047910
CVSS 2.6 - LOW
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE
network
high complexity
strongswan
canonical
debian
CWE-200
nessus
NVD
Published: 2015-06-10
Updated: 2017-11-08

Summary

strongSwan 4.3.0 through 5.x before 5.3.2 and strongSwan VPN Client before 1.4.6, when using EAP or pre-shared keys for authenticating an IKEv2 connection, does not enforce server authentication restrictions until the entire authentication process is complete, which allows remote servers to obtain credentials by using a valid certificate and then reading the responses.

Vulnerable Configurations

Part Description Count
Application
Strongswan
35
OS
Canonical
3
OS
Debian
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • 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.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2015-1196-1.NASL
    descriptionStrongswan was updated to fix one security issue. The following vulnerability was fixed : - CVE-2015-4171: Rogue servers were able to authenticate themselves with certificate issued by any CA the client trusts, to gain user credentials from a client in certain IKEv2 setups (bsc#933591) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 id84562
    published2015-07-07
    reporterThis script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/84562
    titleSUSE SLED12 / SLES12 Security Update : strongswan (SUSE-SU-2015:1196-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2015:1196-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(84562);
  script_version("2.9");
  script_cvs_date("Date: 2019/09/11 11:22:12");

  script_cve_id("CVE-2015-4171");
  script_bugtraq_id(74933);

  script_name(english:"SUSE SLED12 / SLES12 Security Update : strongswan (SUSE-SU-2015:1196-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Strongswan was updated to fix one security issue.

The following vulnerability was fixed :

  - CVE-2015-4171: Rogue servers were able to authenticate
    themselves with certificate issued by any CA the client
    trusts, to gain user credentials from a client in
    certain IKEv2 setups (bsc#933591)

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=933591"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2015-4171/"
  );
  # https://www.suse.com/support/update/announcement/2015/suse-su-20151196-1.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?ee07acfb"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server 12 :

zypper in -t patch SUSE-SLE-SERVER-12-2015-297=1

SUSE Linux Enterprise Desktop 12 :

zypper in -t patch SUSE-SLE-DESKTOP-12-2015-297=1

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/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_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:strongswan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:strongswan-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:strongswan-hmac");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:strongswan-ipsec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:strongswan-ipsec-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:strongswan-libs0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:strongswan-libs0-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/06/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/06/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/07/07");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2019 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/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)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED12|SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED12 / SLES12", "SUSE " + os_ver);

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 " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP0", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP0", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"0", reference:"strongswan-5.1.3-18.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"strongswan-debugsource-5.1.3-18.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"strongswan-hmac-5.1.3-18.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"strongswan-ipsec-5.1.3-18.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"strongswan-ipsec-debuginfo-5.1.3-18.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"strongswan-libs0-5.1.3-18.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"strongswan-libs0-debuginfo-5.1.3-18.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"strongswan-5.1.3-18.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"strongswan-debugsource-5.1.3-18.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"strongswan-ipsec-5.1.3-18.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"strongswan-ipsec-debuginfo-5.1.3-18.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"strongswan-libs0-5.1.3-18.1")) flag++;
if (rpm_check(release:"SLED12", sp:"0", cpu:"x86_64", reference:"strongswan-libs0-debuginfo-5.1.3-18.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_note(port:0, extra:rpm_report_get());
  else security_note(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "strongswan");
}
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2015-1227-1.NASL
    descriptionstrongswan was updated to fix a problem that could enable rogue servers to gain user credentials from a client in certain IKEv2 setups. (CVE-2015-4171) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 id84724
    published2015-07-14
    reporterThis script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/84724
    titleSUSE SLED11 / SLES11 Security Update : strongswan (SUSE-SU-2015:1227-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2015:1227-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(84724);
  script_version("2.8");
  script_cvs_date("Date: 2019/09/11 11:22:12");

  script_cve_id("CVE-2015-4171");
  script_bugtraq_id(74933);

  script_name(english:"SUSE SLED11 / SLES11 Security Update : strongswan (SUSE-SU-2015:1227-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"strongswan was updated to fix a problem that could enable rogue
servers to gain user credentials from a client in certain IKEv2
setups. (CVE-2015-4171)

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=933591"
  );
  # https://download.suse.com/patch/finder/?keywords=812b92d737144f4bab961ce3080050bc
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?51b3cc55"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2015-4171/"
  );
  # https://www.suse.com/support/update/announcement/2015/suse-su-20151227-1.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?4ee287aa"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server 11 SP3 for VMware :

zypper in -t patch slessp3-strongswan=10739

SUSE Linux Enterprise Server 11 SP3 :

zypper in -t patch slessp3-strongswan=10739

SUSE Linux Enterprise Desktop 11 SP3 :

zypper in -t patch sledsp3-strongswan=10739

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/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_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:strongswan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:strongswan-doc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/06/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/07/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/07/14");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2019 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/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)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED11|SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED11 / SLES11", "SUSE " + os_ver);

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 " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES11" && (! preg(pattern:"^(3)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP3", os_ver + " SP" + sp);
if (os_ver == "SLED11" && (! preg(pattern:"^(3)$", string:sp))) audit(AUDIT_OS_NOT, "SLED11 SP3", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES11", sp:"3", reference:"strongswan-4.4.0-6.27.1")) flag++;
if (rpm_check(release:"SLES11", sp:"3", reference:"strongswan-doc-4.4.0-6.27.1")) flag++;
if (rpm_check(release:"SLED11", sp:"3", cpu:"x86_64", reference:"strongswan-4.4.0-6.27.1")) flag++;
if (rpm_check(release:"SLED11", sp:"3", cpu:"x86_64", reference:"strongswan-doc-4.4.0-6.27.1")) flag++;
if (rpm_check(release:"SLED11", sp:"3", cpu:"i586", reference:"strongswan-4.4.0-6.27.1")) flag++;
if (rpm_check(release:"SLED11", sp:"3", cpu:"i586", reference:"strongswan-doc-4.4.0-6.27.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_note(port:0, extra:rpm_report_get());
  else security_note(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "strongswan");
}
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2015-1791-1.NASL
    descriptionstrongswan was updated to fix one security issue. This security issue was fixed : - CVE-2015-4171: A problem that could enable rogue servers to gain user credentials from a client in certain IKEv2 setups. (bsc#933591) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 id86539
    published2015-10-22
    reporterThis script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/86539
    titleSUSE SLES11 Security Update : strongswan (SUSE-SU-2015:1791-1)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-3282.NASL
    descriptionAlexander E. Patrakov discovered an issue in strongSwan, an IKE/IPsec suite used to establish IPsec protected links. When an IKEv2 client authenticates the server with certificates and the client authenticates itself to the server using pre-shared key or EAP, the constraints on the server certificate are only enforced by the client after all authentication steps are completed successfully. A rogue server which can authenticate using a valid certificate issued by any CA trusted by the client could trick the user into continuing the authentication, revealing the username and password digest (for EAP) or even the cleartext password (if EAP-GTC is accepted).
    last seen2020-06-01
    modified2020-06-02
    plugin id84026
    published2015-06-09
    reporterThis script is Copyright (C) 2015-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/84026
    titleDebian DSA-3282-1 : strongswan - security update
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2015-432.NASL
    descriptionstrongswan was updated to fix a rogue servers vulnerability, that may enable rogue servers able to authenticate itself with certificate issued by any CA the client trusts, to gain user credentials from a client in certain IKEv2 setups (bsc#933591,CVE-2015-4171). More information can be found on https://www.strongswan.org/blog/2015/06/08/strongswan-vulnerability-%2 8cve-2015-4171%29.html
    last seen2020-06-05
    modified2015-06-19
    plugin id84283
    published2015-06-19
    reporterThis script is Copyright (C) 2015-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/84283
    titleopenSUSE Security Update : strongswan (openSUSE-2015-432)
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_10D149550E4511E5B6A8002590263BF5.NASL
    descriptionstrongSwan Project reports : An information leak vulnerability was fixed that, in certain IKEv2 setups, allowed rogue servers with a valid certificate accepted by the client to trick it into disclosing user credentials (even plain passwords if the client accepts EAP-GTC). This was caused because constraints against the server
    last seen2020-06-01
    modified2020-06-02
    plugin id84068
    published2015-06-10
    reporterThis script is Copyright (C) 2015-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/84068
    titleFreeBSD : strongswan -- Information Leak Vulnerability (10d14955-0e45-11e5-b6a8-002590263bf5)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2015-1228-1.NASL
    descriptionstrongswan was updated to fix two security issues : An issue that could enable rogue servers to gain user credentials from a client in certain IKEv2 setups. (CVE-2015-4171) A bug in decoding ID_DER_ASN1_DN ID payloads that could be used for remote denial of service attacks. (CVE-2014-2891) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 id84725
    published2015-07-14
    reporterThis script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/84725
    titleSUSE SLES10 Security Update : strongswan (SUSE-SU-2015:1228-1)
  • NASL familyFirewalls
    NASL idPFSENSE_SA-15_06.NASL
    descriptionAccording to its self-reported version number, the remote pfSense install is prior to 2.2.3. It is, therefore, affected by multiple vulnerabilities as stated in the referenced vendor advisories.
    last seen2020-06-01
    modified2020-06-02
    plugin id106495
    published2018-01-31
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106495
    titlepfSense < 2.2.3 Multiple Vulnerabilities (SA-15_07) (Logjam)
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-2628-1.NASL
    descriptionAlexander E. Patrakov discovered that strongSwan incorrectly handled certain IKEv2 setups. A malicious server could possibly use this issue to obtain user credentials. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu 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 id84045
    published2015-06-09
    reporterUbuntu Security Notice (C) 2015-2019 Canonical, Inc. / NASL script (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/84045
    titleUbuntu 14.04 LTS / 14.10 / 15.04 : strongswan vulnerability (USN-2628-1)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-244.NASL
    descriptionAlexander E. Patrakov discovered an issue in strongSwan, an IKE/IPsec suite used to establish IPsec protected links. When a client authenticate the server with certificates and the client authenticates using pre-shared key or EAP, the constraints on the server certificate are only enforced by the client after all authentication steps are completed successfully. A rogue server which can authenticate using a valid certificate issued by any CA trusted by the client could trick the user into continuing the authentication, revealing the username and password digest (for EAP) or even the cleartext password (if EAP-GTC is accepted). - -- Yves-Alexis Perez NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-03-17
    modified2015-06-15
    plugin id84165
    published2015-06-15
    reporterThis script is Copyright (C) 2015-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/84165
    titleDebian DLA-244-1 : strongswan security update

References