Vulnerabilities > CVE-2016-10396 - Algorithmic Complexity vulnerability in Ipsec-Tools 0.8.2

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
low complexity
ipsec-tools
CWE-407
nessus

Summary

The racoon daemon in IPsec-Tools 0.8.2 contains a remotely exploitable computational-complexity attack when parsing and storing ISAKMP fragments. The implementation permits a remote attacker to exhaust computational resources on the remote endpoint by repeatedly sending ISAKMP fragment packets in a particular order such that the worst-case computational complexity is realized in the algorithm utilized to determine if reassembly of the fragments can take place.

Vulnerable Configurations

Part Description Count
Application
Ipsec-Tools
1

Common Weakness Enumeration (CWE)

Nessus

  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-0423-1.NASL
    descriptionThis update for ipsec-tools fixes one issue. This security issue was fixed : - CVE-2016-10396: The racoon daemon contained a remotely exploitable computational-complexity attack when parsing and storing ISAKMP fragments that allowed a remote attacker to exhaust computational resources on the remote endpoint by repeatedly sending ISAKMP fragment packets in a particular order (bsc#1047443). 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 id106787
    published2018-02-13
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106787
    titleSUSE SLES11 Security Update : ipsec-tools (SUSE-SU-2018:0423-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from SUSE update advisory SUSE-SU-2018:0423-1.
    # The text itself is copyright (C) SUSE.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(106787);
      script_version("3.4");
      script_cvs_date("Date: 2019/09/10 13:51:46");
    
      script_cve_id("CVE-2016-10396");
    
      script_name(english:"SUSE SLES11 Security Update : ipsec-tools (SUSE-SU-2018:0423-1)");
      script_summary(english:"Checks rpm output for the updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote SUSE host is missing one or more security updates."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "This update for ipsec-tools fixes one issue. This security issue was
    fixed :
    
      - CVE-2016-10396: The racoon daemon contained a remotely
        exploitable computational-complexity attack when parsing
        and storing ISAKMP fragments that allowed a remote
        attacker to exhaust computational resources on the
        remote endpoint by repeatedly sending ISAKMP fragment
        packets in a particular order (bsc#1047443).
    
    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=1047443"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2016-10396/"
      );
      # https://www.suse.com/support/update/announcement/2018/suse-su-20180423-1/
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?10c3703b"
      );
      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-SP4:zypper in -t patch
    slessp4-ipsec-tools-13463=1
    
    SUSE Linux Enterprise Debuginfo 11-SP4:zypper in -t patch
    dbgsp4-ipsec-tools-13463=1
    
    To bring your system up-to-date, use 'zypper patch'."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/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:ipsec-tools");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2017/07/06");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/02/12");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/13");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2019 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:"^(SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE 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:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP4", os_ver + " SP" + sp);
    
    
    flag = 0;
    if (rpm_check(release:"SLES11", sp:"4", reference:"ipsec-tools-0.7.3-1.38.3.1")) flag++;
    
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ipsec-tools");
    }
    
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-0424-1.NASL
    descriptionThis update for ipsec-tools fixes one issue. This security issue was fixed : - CVE-2016-10396: The racoon daemon contained a remotely exploitable computational-complexity attack when parsing and storing ISAKMP fragments that allowed a remote attacker to exhaust computational resources on the remote endpoint by repeatedly sending ISAKMP fragment packets in a particular order (bsc#1047443). 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 id106788
    published2018-02-13
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106788
    titleSUSE SLES12 Security Update : ipsec-tools (SUSE-SU-2018:0424-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from SUSE update advisory SUSE-SU-2018:0424-1.
    # The text itself is copyright (C) SUSE.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(106788);
      script_version("3.4");
      script_cvs_date("Date: 2019/09/10 13:51:46");
    
      script_cve_id("CVE-2016-10396");
    
      script_name(english:"SUSE SLES12 Security Update : ipsec-tools (SUSE-SU-2018:0424-1)");
      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:
    "This update for ipsec-tools fixes one issue. This security issue was
    fixed :
    
      - CVE-2016-10396: The racoon daemon contained a remotely
        exploitable computational-complexity attack when parsing
        and storing ISAKMP fragments that allowed a remote
        attacker to exhaust computational resources on the
        remote endpoint by repeatedly sending ISAKMP fragment
        packets in a particular order (bsc#1047443).
    
    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=1047443"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2016-10396/"
      );
      # https://www.suse.com/support/update/announcement/2018/suse-su-20180424-1/
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?a76fedf9"
      );
      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 for Raspberry Pi 12-SP2:zypper in -t
    patch SUSE-SLE-RPI-12-SP2-2018-288=1
    
    SUSE Linux Enterprise Server 12-SP3:zypper in -t patch
    SUSE-SLE-SERVER-12-SP3-2018-288=1
    
    SUSE Linux Enterprise Server 12-SP2:zypper in -t patch
    SUSE-SLE-SERVER-12-SP2-2018-288=1
    
    To bring your system up-to-date, use 'zypper patch'."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/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:ipsec-tools");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:ipsec-tools-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:ipsec-tools-debugsource");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2017/07/06");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/02/12");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/13");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2019 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:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE 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:"^(2|3)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP2/3", os_ver + " SP" + sp);
    
    
    flag = 0;
    if (rpm_check(release:"SLES12", sp:"3", reference:"ipsec-tools-0.8.0-19.3.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"3", reference:"ipsec-tools-debuginfo-0.8.0-19.3.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"3", reference:"ipsec-tools-debugsource-0.8.0-19.3.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"2", reference:"ipsec-tools-0.8.0-19.3.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"2", reference:"ipsec-tools-debuginfo-0.8.0-19.3.1")) flag++;
    if (rpm_check(release:"SLES12", sp:"2", reference:"ipsec-tools-debugsource-0.8.0-19.3.1")) flag++;
    
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ipsec-tools");
    }
    
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1044.NASL
    descriptionThe racoon daemon in IPsec-Tools 0.8.2 and earlier contains a remotely exploitable computational-complexity attack when parsing and storing ISAKMP fragments. The implementation permits a remote attacker to exhaust computational resources on the remote endpoint by repeatedly sending ISAKMP fragment packets in a particular order such that the worst-case computational complexity is realized in the algorithm utilized to determine if reassembly of the fragments can take place. For Debian 7
    last seen2020-03-17
    modified2017-07-31
    plugin id102042
    published2017-07-31
    reporterThis script is Copyright (C) 2017-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/102042
    titleDebian DLA-1044-1 : ipsec-tools security update
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Debian Security Advisory DLA-1044-1. The text
    # itself is copyright (C) Software in the Public Interest, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(102042);
      script_version("3.5");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");
    
      script_cve_id("CVE-2016-10396");
    
      script_name(english:"Debian DLA-1044-1 : ipsec-tools security update");
      script_summary(english:"Checks dpkg output for the updated packages.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Debian host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "The racoon daemon in IPsec-Tools 0.8.2 and earlier contains a remotely
    exploitable computational-complexity attack when parsing and storing
    ISAKMP fragments. The implementation permits a remote attacker to
    exhaust computational resources on the remote endpoint by repeatedly
    sending ISAKMP fragment packets in a particular order such that the
    worst-case computational complexity is realized in the algorithm
    utilized to determine if reassembly of the fragments can take place.
    
    For Debian 7 'Wheezy', these problems have been fixed in version
    1:0.8.0-14+deb7u2.
    
    We recommend that you upgrade your ipsec-tools packages.
    
    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."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://lists.debian.org/debian-lts-announce/2017/07/msg00039.html"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://packages.debian.org/source/wheezy/ipsec-tools"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Upgrade the affected ipsec-tools, and racoon packages."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/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:debian:debian_linux:ipsec-tools");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:racoon");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2017/07/29");
      script_set_attribute(attribute:"plugin_publication_date", value:"2017/07/31");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2017-2020 Tenable Network Security, Inc.");
      script_family(english:"Debian Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("debian_package.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
    if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    if (deb_check(release:"7.0", prefix:"ipsec-tools", reference:"1:0.8.0-14+deb7u1")) flag++;
    if (deb_check(release:"7.0", prefix:"racoon", reference:"1:0.8.0-14+deb7u1")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
      else security_hole(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");
    
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_974A6D323FDA11E8AEA4001B216D295B.NASL
    descriptionRobert Foggia via NetBSD GNATS reports : The ipsec-tools racoon daemon contains a remotely exploitable computational complexity attack when parsing and storing isakmp fragments. The implementation permits a remote attacker to exhaust computational resources on the remote endpoint by repeatedly sending isakmp fragment packets in a particular order such that the worst-case computational complexity is realized in the algorithm utilized to determine if reassembly of the fragments can take place.
    last seen2020-06-01
    modified2020-06-02
    plugin id109054
    published2018-04-16
    reporterThis script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/109054
    titleFreeBSD : ipsec-tools -- remotely exploitable computational-complexity attack (974a6d32-3fda-11e8-aea4-001b216d295b)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2018-159.NASL
    descriptionThis update for ipsec-tools fixes one issue. This security issue was fixed : - CVE-2016-10396: The racoon daemon contained a remotely exploitable computational-complexity attack when parsing and storing ISAKMP fragments that allowed a remote attacker to exhaust computational resources on the remote endpoint by repeatedly sending ISAKMP fragment packets in a particular order (bsc#1047443). This update was imported from the SUSE:SLE-12:Update update project.
    last seen2020-06-05
    modified2018-02-14
    plugin id106814
    published2018-02-14
    reporterThis script is Copyright (C) 2018-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/106814
    titleopenSUSE Security Update : ipsec-tools (openSUSE-2018-159)