Vulnerabilities > CVE-2016-10142 - Code vulnerability in Ietf Ipv6
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
An issue was discovered in the IPv6 protocol specification, related to ICMP Packet Too Big (PTB) messages. (The scope of this CVE is all affected IPv6 implementations from all vendors.) The security implications of IP fragmentation have been discussed at length in [RFC6274] and [RFC7739]. An attacker can leverage the generation of IPv6 atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow (in scenarios in which actual fragmentation of packets is not needed) and can subsequently perform any type of fragmentation-based attack against legacy IPv6 nodes that do not implement [RFC6946]. That is, employing fragmentation where not actually needed allows for fragmentation-based attack vectors to be employed, unnecessarily. We note that, unfortunately, even nodes that already implement [RFC6946] can be subject to DoS attacks as a result of the generation of IPv6 atomic fragments. Let us assume that Host A is communicating with Host B and that, as a result of the widespread dropping of IPv6 packets that contain extension headers (including fragmentation) [RFC7872], some intermediate node filters fragments between Host B and Host A. If an attacker sends a forged ICMPv6 PTB error message to Host B, reporting an MTU smaller than 1280, this will trigger the generation of IPv6 atomic fragments from that moment on (as required by [RFC2460]). When Host B starts sending IPv6 atomic fragments (in response to the received ICMPv6 PTB error message), these packets will be dropped, since we previously noted that IPv6 packets with extension headers were being dropped between Host B and Host A. Thus, this situation will result in a DoS scenario. Another possible scenario is that in which two BGP peers are employing IPv6 transport and they implement Access Control Lists (ACLs) to drop IPv6 fragments (to avoid control-plane attacks). If the aforementioned BGP peers drop IPv6 fragments but still honor received ICMPv6 PTB error messages, an attacker could easily attack the corresponding peering session by simply sending an ICMPv6 PTB message with a reported MTU smaller than 1280 bytes. Once the attack packet has been sent, the aforementioned routers will themselves be the ones dropping their own traffic.
Common Weakness Enumeration (CWE)
Nessus
NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2017-3566.NASL description Description of changes: kernel-uek [3.8.13-118.18.2.el7uek] - nfsd: stricter decoding of write-like NFSv2/v3 ops (J. Bruce Fields) [Orabug: 25986990] {CVE-2017-7895} [3.8.13-118.18.1.el7uek] - fnic: Update fnic driver version to 1.6.0.24 (John Sobecki) [Orabug: 24448585] - xen-netfront: Rework the fix for Rx stall during OOM and network stress (Dongli Zhang) [Orabug: 25450703] - xen-netfront: Fix Rx stall during network stress and OOM (Dongli Zhang) [Orabug: 25450703] - ipv6: Skip XFRM lookup if dst_entry in socket cache is valid (Jakub Sitnicki) - uek-rpm: enable CONFIG_KSPLICE. (Jamie Iles) [Orabug: 25549809] - ksplice: add sysctls for determining Ksplice features. (Jamie Iles) [Orabug: 25549809] - signal: protect SIGNAL_UNKILLABLE from unintentional clearing. (Jamie Iles) [Orabug: 25549809] - VSOCK: Fix lockdep issue. (Dongli Zhang) [Orabug: 25559937] - VSOCK: sock_put wasn last seen 2020-06-01 modified 2020-06-02 plugin id 100234 published 2017-05-17 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/100234 title Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2017-3566) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Oracle Linux Security Advisory ELSA-2017-3566. # include("compat.inc"); if (description) { script_id(100234); script_version("3.11"); script_cvs_date("Date: 2019/09/27 13:00:38"); script_cve_id("CVE-2015-5257", "CVE-2015-6252", "CVE-2015-9731", "CVE-2016-10088", "CVE-2016-10142", "CVE-2016-10208", "CVE-2016-10229", "CVE-2016-2782", "CVE-2016-7910", "CVE-2016-8399", "CVE-2016-9644", "CVE-2017-2583", "CVE-2017-2647", "CVE-2017-5669", "CVE-2017-5986", "CVE-2017-6214", "CVE-2017-7184", "CVE-2017-7187", "CVE-2017-7895"); script_name(english:"Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2017-3566)"); script_summary(english:"Checks rpm output for the updated packages"); script_set_attribute( attribute:"synopsis", value:"The remote Oracle Linux host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "Description of changes: kernel-uek [3.8.13-118.18.2.el7uek] - nfsd: stricter decoding of write-like NFSv2/v3 ops (J. Bruce Fields) [Orabug: 25986990] {CVE-2017-7895} [3.8.13-118.18.1.el7uek] - fnic: Update fnic driver version to 1.6.0.24 (John Sobecki) [Orabug: 24448585] - xen-netfront: Rework the fix for Rx stall during OOM and network stress (Dongli Zhang) [Orabug: 25450703] - xen-netfront: Fix Rx stall during network stress and OOM (Dongli Zhang) [Orabug: 25450703] - ipv6: Skip XFRM lookup if dst_entry in socket cache is valid (Jakub Sitnicki) - uek-rpm: enable CONFIG_KSPLICE. (Jamie Iles) [Orabug: 25549809] - ksplice: add sysctls for determining Ksplice features. (Jamie Iles) [Orabug: 25549809] - signal: protect SIGNAL_UNKILLABLE from unintentional clearing. (Jamie Iles) [Orabug: 25549809] - VSOCK: Fix lockdep issue. (Dongli Zhang) [Orabug: 25559937] - VSOCK: sock_put wasn't safe to call in interrupt context (Dongli Zhang) [Orabug: 25559937] - IB/CORE: sync the resouce access in fmr_pool (Wengang Wang) [Orabug: 25677469] - KVM: x86: fix emulation of 'MOV SS, null selector' (Paolo Bonzini) [Orabug: 25719675] {CVE-2017-2583} {CVE-2017-2583} - ext4: validate s_first_meta_bg at mount time (Eryu Guan) [Orabug: 25719738] {CVE-2016-10208} - sctp: avoid BUG_ON on sctp_wait_for_sndbuf (Marcelo Ricardo Leitner) [Orabug: 25719810] {CVE-2017-5986} - tcp: avoid infinite loop in tcp_splice_read() (Eric Dumazet) [Orabug: 25720813] {CVE-2017-6214} - lpfc cannot establish connection with targets that send PRLI under P2P mode (Joe Jin) [Orabug: 25759083] - USB: visor: fix null-deref at probe (Johan Hovold) [Orabug: 25796594] {CVE-2016-2782} - ipc/shm: Fix shmat mmap nil-page protection (Davidlohr Bueso) [Orabug: 25797012] {CVE-2017-5669} - vhost: actually track log eventfd file (Marc-André Lureau) [Orabug: 25797052] {CVE-2015-6252} - xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder (Andy Whitcroft) [Orabug: 25814663] {CVE-2017-7184} - xfrm_user: validate XFRM_MSG_NEWAE XFRMA_REPLAY_ESN_VAL replay_window (Andy Whitcroft) [Orabug: 25814663] {CVE-2017-7184} - KEYS: Remove key_type::match in favour of overriding default by match_preparse (Aniket Alshi) [Orabug: 25823962] {CVE-2017-2647} {CVE-2017-2647} - USB: whiteheat: fix potential null-deref at probe (Johan Hovold) [Orabug: 25825105] {CVE-2015-5257} {CVE-2015-5257} - udf: Check path length when reading symlink (Jan Kara) [Orabug: 25871102] {CVE-2015-9731} - udp: properly support MSG_PEEK with truncated buffers (Eric Dumazet) [Orabug: 25876655] {CVE-2016-10229} - block: fix use-after-free in seq file (Vegard Nossum) [Orabug: 25877530] {CVE-2016-7910} - Revert 'fix minor infoleak in get_user_ex()' (Brian Maly) [Orabug: 25790392] {CVE-2016-9644} - net: ping: check minimum size on ICMP header length (Kees Cook) [Orabug: 25766911] {CVE-2016-8399} - ipv6: stop sending PTB packets for MTU < 1280 (Hagen Paul Pfeifer) [Orabug: 25765776] {CVE-2016-10142} - sg_write()/bsg_write() is not fit to be called under KERNEL_DS (Al Viro) [Orabug: 25765445] {CVE-2016-10088} - scsi: sg: check length passed to SG_NEXT_CMD_LEN (peter chang) [Orabug: 25751996] {CVE-2017-7187}" ); script_set_attribute( attribute:"see_also", value:"https://oss.oracle.com/pipermail/el-errata/2017-May/006911.html" ); script_set_attribute( attribute:"see_also", value:"https://oss.oracle.com/pipermail/el-errata/2017-May/006912.html" ); script_set_attribute( attribute:"solution", value:"Update the affected unbreakable enterprise kernel packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:dtrace-modules-3.8.13-118.18.2.el6uek"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:dtrace-modules-3.8.13-118.18.2.el7uek"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-debug"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-debug-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-doc"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-firmware"); script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6"); script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7"); script_set_attribute(attribute:"vuln_publication_date", value:"2015/10/19"); script_set_attribute(attribute:"patch_publication_date", value:"2017/05/16"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/17"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Oracle Linux Local Security Checks"); script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl"); script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); include("ksplice.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux"); release = get_kb_item("Host/RedHat/release"); if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux"); os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux"); os_ver = os_ver[1]; if (! preg(pattern:"^(6|7)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 6 / 7", "Oracle Linux " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu); if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu); if (get_one_kb_item("Host/ksplice/kernel-cves")) { rm_kb_item(name:"Host/uptrack-uname-r"); cve_list = make_list("CVE-2015-5257", "CVE-2015-6252", "CVE-2015-9731", "CVE-2016-10088", "CVE-2016-10142", "CVE-2016-10208", "CVE-2016-10229", "CVE-2016-2782", "CVE-2016-7910", "CVE-2016-8399", "CVE-2016-9644", "CVE-2017-2583", "CVE-2017-2647", "CVE-2017-5669", "CVE-2017-5986", "CVE-2017-6214", "CVE-2017-7184", "CVE-2017-7187", "CVE-2017-7895"); if (ksplice_cves_check(cve_list)) { audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for ELSA-2017-3566"); } else { __rpm_report = ksplice_reporting_text(); } } kernel_major_minor = get_kb_item("Host/uname/major_minor"); if (empty_or_null(kernel_major_minor)) exit(1, "Unable to determine kernel major-minor level."); expected_kernel_major_minor = "3.8"; if (kernel_major_minor != expected_kernel_major_minor) audit(AUDIT_OS_NOT, "running kernel level " + expected_kernel_major_minor + ", it is running kernel level " + kernel_major_minor); flag = 0; if (rpm_check(release:"EL6", cpu:"x86_64", reference:"dtrace-modules-3.8.13-118.18.2.el6uek-0.4.5-3.el6")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-3.8.13") && rpm_check(release:"EL6", cpu:"x86_64", reference:"kernel-uek-3.8.13-118.18.2.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-debug-3.8.13") && rpm_check(release:"EL6", cpu:"x86_64", reference:"kernel-uek-debug-3.8.13-118.18.2.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-debug-devel-3.8.13") && rpm_check(release:"EL6", cpu:"x86_64", reference:"kernel-uek-debug-devel-3.8.13-118.18.2.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-devel-3.8.13") && rpm_check(release:"EL6", cpu:"x86_64", reference:"kernel-uek-devel-3.8.13-118.18.2.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-doc-3.8.13") && rpm_check(release:"EL6", cpu:"x86_64", reference:"kernel-uek-doc-3.8.13-118.18.2.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-firmware-3.8.13") && rpm_check(release:"EL6", cpu:"x86_64", reference:"kernel-uek-firmware-3.8.13-118.18.2.el6uek")) flag++; if (rpm_check(release:"EL7", cpu:"x86_64", reference:"dtrace-modules-3.8.13-118.18.2.el7uek-0.4.5-3.el7")) flag++; if (rpm_exists(release:"EL7", rpm:"kernel-uek-3.8.13") && rpm_check(release:"EL7", cpu:"x86_64", reference:"kernel-uek-3.8.13-118.18.2.el7uek")) flag++; if (rpm_exists(release:"EL7", rpm:"kernel-uek-debug-3.8.13") && rpm_check(release:"EL7", cpu:"x86_64", reference:"kernel-uek-debug-3.8.13-118.18.2.el7uek")) flag++; if (rpm_exists(release:"EL7", rpm:"kernel-uek-debug-devel-3.8.13") && rpm_check(release:"EL7", cpu:"x86_64", reference:"kernel-uek-debug-devel-3.8.13-118.18.2.el7uek")) flag++; if (rpm_exists(release:"EL7", rpm:"kernel-uek-devel-3.8.13") && rpm_check(release:"EL7", cpu:"x86_64", reference:"kernel-uek-devel-3.8.13-118.18.2.el7uek")) flag++; if (rpm_exists(release:"EL7", rpm:"kernel-uek-doc-3.8.13") && rpm_check(release:"EL7", cpu:"x86_64", reference:"kernel-uek-doc-3.8.13-118.18.2.el7uek")) flag++; if (rpm_exists(release:"EL7", rpm:"kernel-uek-firmware-3.8.13") && rpm_check(release:"EL7", cpu:"x86_64", reference:"kernel-uek-firmware-3.8.13-118.18.2.el7uek")) 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, "affected kernel"); }NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2017-3567.NASL description Description of changes: [2.6.39-400.295.2.el6uek] - nfsd: stricter decoding of write-like NFSv2/v3 ops (J. Bruce Fields) [Orabug: 25986995] {CVE-2017-7895} [2.6.39-400.295.1.el6uek] - ocfs2/o2net: o2net_listen_data_ready should do nothing if socket state is not TCP_LISTEN (Tariq Saeed) [Orabug: 25510857] - IB/CORE: sync the resouce access in fmr_pool (Wengang Wang) [Orabug: 23750748] - ipv6: Skip XFRM lookup if dst_entry in socket cache is valid (Jakub Sitnicki) [Orabug: 25534688] - uek-rpm: enable CONFIG_KSPLICE. (Jamie Iles) [Orabug: 25549845] - ksplice: add sysctls for determining Ksplice features. (Jamie Iles) [Orabug: 25549845] - signal: protect SIGNAL_UNKILLABLE from unintentional clearing. (Jamie Iles) [Orabug: 25549845] - KVM: x86: fix emulation of last seen 2020-06-01 modified 2020-06-02 plugin id 100235 published 2017-05-17 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/100235 title Oracle Linux 6 : Unbreakable Enterprise kernel (ELSA-2017-3567) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Oracle Linux Security Advisory ELSA-2017-3567. # include("compat.inc"); if (description) { script_id(100235); script_version("3.14"); script_cvs_date("Date: 2019/09/27 13:00:38"); script_cve_id("CVE-2013-7446", "CVE-2015-1420", "CVE-2015-4700", "CVE-2015-5257", "CVE-2015-5707", "CVE-2015-6252", "CVE-2015-6937", "CVE-2015-9731", "CVE-2016-10088", "CVE-2016-10142", "CVE-2016-10229", "CVE-2016-2782", "CVE-2016-3140", "CVE-2016-3672", "CVE-2016-4482", "CVE-2016-4485", "CVE-2016-4580", "CVE-2016-7425", "CVE-2016-7910", "CVE-2016-8399", "CVE-2016-8633", "CVE-2016-8645", "CVE-2017-2583", "CVE-2017-2636", "CVE-2017-2647", "CVE-2017-5669", "CVE-2017-5986", "CVE-2017-6074", "CVE-2017-6214", "CVE-2017-6345", "CVE-2017-7184", "CVE-2017-7187", "CVE-2017-7895"); script_name(english:"Oracle Linux 6 : Unbreakable Enterprise kernel (ELSA-2017-3567)"); script_summary(english:"Checks rpm output for the updated packages"); script_set_attribute( attribute:"synopsis", value:"The remote Oracle Linux host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "Description of changes: [2.6.39-400.295.2.el6uek] - nfsd: stricter decoding of write-like NFSv2/v3 ops (J. Bruce Fields) [Orabug: 25986995] {CVE-2017-7895} [2.6.39-400.295.1.el6uek] - ocfs2/o2net: o2net_listen_data_ready should do nothing if socket state is not TCP_LISTEN (Tariq Saeed) [Orabug: 25510857] - IB/CORE: sync the resouce access in fmr_pool (Wengang Wang) [Orabug: 23750748] - ipv6: Skip XFRM lookup if dst_entry in socket cache is valid (Jakub Sitnicki) [Orabug: 25534688] - uek-rpm: enable CONFIG_KSPLICE. (Jamie Iles) [Orabug: 25549845] - ksplice: add sysctls for determining Ksplice features. (Jamie Iles) [Orabug: 25549845] - signal: protect SIGNAL_UNKILLABLE from unintentional clearing. (Jamie Iles) [Orabug: 25549845] - KVM: x86: fix emulation of 'MOV SS, null selector' (Paolo Bonzini) [Orabug: 25719676] {CVE-2017-2583} {CVE-2017-2583} - sctp: avoid BUG_ON on sctp_wait_for_sndbuf (Marcelo Ricardo Leitner) [Orabug: 25719811] {CVE-2017-5986} - tcp: avoid infinite loop in tcp_splice_read() (Eric Dumazet) [Orabug: 25720815] {CVE-2017-6214} - USB: visor: fix null-deref at probe (Johan Hovold) [Orabug: 25796604] {CVE-2016-2782} - ipc/shm: Fix shmat mmap nil-page protection (Davidlohr Bueso) [Orabug: 25797014] {CVE-2017-5669} - vhost: actually track log eventfd file (Marc-André Lureau) [Orabug: 25797056] {CVE-2015-6252} - xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder (Andy Whitcroft) [Orabug: 25814664] {CVE-2017-7184} - xfrm_user: validate XFRM_MSG_NEWAE XFRMA_REPLAY_ESN_VAL replay_window (Andy Whitcroft) [Orabug: 25814664] {CVE-2017-7184} - KEYS: Remove key_type::match in favour of overriding default by match_preparse (David Howells) [Orabug: 25823965] {CVE-2017-2647} {CVE-2017-2647} - USB: whiteheat: fix potential null-deref at probe (Johan Hovold) [Orabug: 25825107] {CVE-2015-5257} - RDS: fix race condition when sending a message on unbound socket (Quentin Casasnovas) [Orabug: 25871048] {CVE-2015-6937} {CVE-2015-6937} - udf: Check path length when reading symlink (Jan Kara) [Orabug: 25871104] {CVE-2015-9731} - udf: Treat symlink component of type 2 as / (Jan Kara) [Orabug: 25871104] {CVE-2015-9731} - udp: properly support MSG_PEEK with truncated buffers (Eric Dumazet) [Orabug: 25874741] {CVE-2016-10229} - block: fix use-after-free in seq file (Vegard Nossum) [Orabug: 25877531] {CVE-2016-7910} - RHEL: complement upstream workaround for CVE-2016-10142. (Quentin Casasnovas) [Orabug: 25765786] {CVE-2016-10142} {CVE-2016-10142} - net: ping: check minimum size on ICMP header length (Kees Cook) [Orabug: 25766914] {CVE-2016-8399} - ipv6: stop sending PTB packets for MTU < 1280 (Hagen Paul Pfeifer) [Orabug: 25765786] {CVE-2016-10142} - sg_write()/bsg_write() is not fit to be called under KERNEL_DS (Al Viro) [Orabug: 25765448] {CVE-2016-10088} - scsi: sg: check length passed to SG_NEXT_CMD_LEN (peter chang) [Orabug: 25752011] {CVE-2017-7187} - tty: n_hdlc: get rid of racy n_hdlc.tbuf (Alexander Popov) [Orabug: 25696689] {CVE-2017-2636} - TTY: n_hdlc, fix lockdep false positive (Jiri Slaby) [Orabug: 25696689] {CVE-2017-2636} - drivers/tty/n_hdlc.c: replace kmalloc/memset by kzalloc (Fabian Frederick) [Orabug: 25696689] {CVE-2017-2636} - list: introduce list_first_entry_or_null (Jiri Pirko) [Orabug: 25696689] {CVE-2017-2636} - firewire: net: guard against rx buffer overflows (Stefan Richter) [Orabug: 25451538] {CVE-2016-8633} - x86/mm/32: Enable full randomization on i386 and X86_32 (Hector Marco-Gisbert) [Orabug: 25463929] {CVE-2016-3672} - x86 get_unmapped_area: Access mmap_legacy_base through mm_struct member (Radu Caragea) [Orabug: 25463929] {CVE-2016-3672} - sg_start_req(): make sure that there's not too many elements in iovec (Al Viro) [Orabug: 25490377] {CVE-2015-5707} - tcp: take care of truncations done by sk_filter() (Eric Dumazet) [Orabug: 25507232] {CVE-2016-8645} - rose: limit sk_filter trim to payload (Willem de Bruijn) [Orabug: 25507232] {CVE-2016-8645} - scsi: arcmsr: Buffer overflow in arcmsr_iop_message_xfer() (Dan Carpenter) [Orabug: 25507330] {CVE-2016-7425} - x86: bpf_jit: fix compilation of large bpf programs (Alexei Starovoitov) [Orabug: 25507375] {CVE-2015-4700} - net: fix a kernel infoleak in x25 module (Kangjie Lu) [Orabug: 25512417] {CVE-2016-4580} - USB: digi_acceleport: do sanity checking for the number of ports (Oliver Neukum) [Orabug: 25512472] {CVE-2016-3140} - net/llc: avoid BUG_ON() in skb_orphan() (Eric Dumazet) [Orabug: 25682437] {CVE-2017-6345} - dccp: fix freeing skb too early for IPV6_RECVPKTINFO (Andrey Konovalov) [Orabug: 25598277] {CVE-2017-6074} - vfs: read file_handle only once in handle_to_path (Sasha Levin) [Orabug: 25388709] {CVE-2015-1420} - crypto: algif_hash - Only export and import on sockets with data (Herbert Xu) [Orabug: 25417807] - USB: usbfs: fix potential infoleak in devio (Kangjie Lu) [Orabug: 25462763] {CVE-2016-4482} - net: fix infoleak in llc (Kangjie Lu) [Orabug: 25462811] {CVE-2016-4485} - af_unix: Guard against other == sk in unix_dgram_sendmsg (Rainer Weikusat) [Orabug: 25464000] {CVE-2013-7446} - unix: avoid use-after-free in ep_remove_wait_queue (Rainer Weikusat) [Orabug: 25464000] {CVE-2013-7446}" ); script_set_attribute( attribute:"see_also", value:"https://oss.oracle.com/pipermail/el-errata/2017-May/006913.html" ); script_set_attribute( attribute:"solution", value:"Update the affected unbreakable enterprise kernel packages." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"exploit_framework_core", value:"true"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-debug"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-debug-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-doc"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-firmware"); script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6"); script_set_attribute(attribute:"vuln_publication_date", value:"2015/03/16"); script_set_attribute(attribute:"patch_publication_date", value:"2017/05/16"); script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/17"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Oracle Linux Local Security Checks"); script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl"); script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); include("ksplice.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux"); release = get_kb_item("Host/RedHat/release"); if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux"); os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux"); os_ver = os_ver[1]; if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 6", "Oracle Linux " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu); if (get_one_kb_item("Host/ksplice/kernel-cves")) { rm_kb_item(name:"Host/uptrack-uname-r"); cve_list = make_list("CVE-2013-7446", "CVE-2015-1420", "CVE-2015-4700", "CVE-2015-5257", "CVE-2015-5707", "CVE-2015-6252", "CVE-2015-6937", "CVE-2015-9731", "CVE-2016-10088", "CVE-2016-10142", "CVE-2016-10229", "CVE-2016-2782", "CVE-2016-3140", "CVE-2016-3672", "CVE-2016-4482", "CVE-2016-4485", "CVE-2016-4580", "CVE-2016-7425", "CVE-2016-7910", "CVE-2016-8399", "CVE-2016-8633", "CVE-2016-8645", "CVE-2017-2583", "CVE-2017-2636", "CVE-2017-2647", "CVE-2017-5669", "CVE-2017-5986", "CVE-2017-6074", "CVE-2017-6214", "CVE-2017-6345", "CVE-2017-7184", "CVE-2017-7187", "CVE-2017-7895"); if (ksplice_cves_check(cve_list)) { audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for ELSA-2017-3567"); } else { __rpm_report = ksplice_reporting_text(); } } kernel_major_minor = get_kb_item("Host/uname/major_minor"); if (empty_or_null(kernel_major_minor)) exit(1, "Unable to determine kernel major-minor level."); expected_kernel_major_minor = "2.6"; if (kernel_major_minor != expected_kernel_major_minor) audit(AUDIT_OS_NOT, "running kernel level " + expected_kernel_major_minor + ", it is running kernel level " + kernel_major_minor); flag = 0; if (rpm_exists(release:"EL6", rpm:"kernel-uek-2.6.39") && rpm_check(release:"EL6", reference:"kernel-uek-2.6.39-400.295.2.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-debug-2.6.39") && rpm_check(release:"EL6", reference:"kernel-uek-debug-2.6.39-400.295.2.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-debug-devel-2.6.39") && rpm_check(release:"EL6", reference:"kernel-uek-debug-devel-2.6.39-400.295.2.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-devel-2.6.39") && rpm_check(release:"EL6", reference:"kernel-uek-devel-2.6.39-400.295.2.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-doc-2.6.39") && rpm_check(release:"EL6", reference:"kernel-uek-doc-2.6.39-400.295.2.el6uek")) flag++; if (rpm_exists(release:"EL6", rpm:"kernel-uek-firmware-2.6.39") && rpm_check(release:"EL6", reference:"kernel-uek-firmware-2.6.39-400.295.2.el6uek")) 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, "affected kernel"); }NASL family Misc. NASL id PULSE_CONNECT_SECURE-SA-43730.NASL description According to its self-reported version, the version of Pulse Connect Secure running on the remote host is affected by multiple vulnerabilities. Refer to the vendor advisory for additional information. last seen 2020-06-01 modified 2020-06-02 plugin id 109919 published 2018-05-18 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/109919 title Pulse Connect Secure Multiple Vulnerabilities (SA43730) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2017-3534.NASL description Description of changes: [3.8.13-118.17.4.el7uek] - Revert last seen 2020-06-01 modified 2020-06-02 plugin id 99160 published 2017-04-03 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99160 title Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2017-3534) NASL family Scientific Linux Local Security Checks NASL id SL_20170321_KERNEL_ON_SL6_X.NASL description Security Fix(es) : - It was discovered that a remote attacker could leverage the generation of IPv6 atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow (in scenarios in which actual fragmentation of packets is not needed) and could subsequently perform any type of a fragmentation- based attack against legacy IPv6 nodes that do not implement RFC6946. (CVE-2016-10142, Moderate) - A flaw was discovered in the way the Linux kernel dealt with paging structures. When the kernel invalidated a paging structure that was not in use locally, it could, in principle, race against another CPU that is switching to a process that uses the paging structure in question. A local user could use a thread running with a stale cached virtual->physical translation to potentially escalate their privileges if the translation in question were writable and the physical page got reused for something critical (for example, a page table). (CVE-2016-2069, Moderate) - A race condition flaw was found in the ioctl_send_fib() function in the Linux kernel last seen 2020-03-18 modified 2017-04-06 plugin id 99218 published 2017-04-06 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99218 title Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20170321) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2017-0817.NASL description An update for kernel is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es) : * It was discovered that a remote attacker could leverage the generation of IPv6 atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow (in scenarios in which actual fragmentation of packets is not needed) and could subsequently perform any type of a fragmentation-based attack against legacy IPv6 nodes that do not implement RFC6946. (CVE-2016-10142, Moderate) * A flaw was discovered in the way the Linux kernel dealt with paging structures. When the kernel invalidated a paging structure that was not in use locally, it could, in principle, race against another CPU that is switching to a process that uses the paging structure in question. A local user could use a thread running with a stale cached virtual->physical translation to potentially escalate their privileges if the translation in question were writable and the physical page got reused for something critical (for example, a page table). (CVE-2016-2069, Moderate) * A race condition flaw was found in the ioctl_send_fib() function in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 97886 published 2017-03-22 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/97886 title RHEL 6 : kernel (RHSA-2017:0817) NASL family Misc. NASL id PULSE_POLICY_SECURE-SA-43730.NASL description According to its self-reported version, the version of Pulse Policy Secure running on the remote host is affected by multiple vulnerabilities. Refer to the vendor advisory for additional information. last seen 2020-06-01 modified 2020-06-02 plugin id 109920 published 2018-05-18 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/109920 title Pulse Policy Secure Multiple Vulnerabilities (SA43730) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2017-0817.NASL description An update for kernel is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es) : * It was discovered that a remote attacker could leverage the generation of IPv6 atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow (in scenarios in which actual fragmentation of packets is not needed) and could subsequently perform any type of a fragmentation-based attack against legacy IPv6 nodes that do not implement RFC6946. (CVE-2016-10142, Moderate) * A flaw was discovered in the way the Linux kernel dealt with paging structures. When the kernel invalidated a paging structure that was not in use locally, it could, in principle, race against another CPU that is switching to a process that uses the paging structure in question. A local user could use a thread running with a stale cached virtual->physical translation to potentially escalate their privileges if the translation in question were writable and the physical page got reused for something critical (for example, a page table). (CVE-2016-2069, Moderate) * A race condition flaw was found in the ioctl_send_fib() function in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 97962 published 2017-03-27 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/97962 title CentOS 6 : kernel (CESA-2017:0817) NASL family Virtuozzo Local Security Checks NASL id VIRTUOZZO_VZA-2017-025.NASL description According to the versions of the parallels-server-bm-release / vzkernel / etc packages installed, the Virtuozzo installation on the remote host is affected by the following vulnerabilities : - A flaw was found in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 99106 published 2017-03-31 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99106 title Virtuozzo 6 : parallels-server-bm-release / vzkernel / etc (VZA-2017-025) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2017-0058.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : - RHEL: complement upstream workaround for CVE-2016-10142. (Quentin Casasnovas) [Orabug: 25765786] (CVE-2016-10142) (CVE-2016-10142) - net: ping: check minimum size on ICMP header length (Kees Cook) [Orabug: 25766914] (CVE-2016-8399) - ipv6: stop sending PTB packets for MTU < 1280 (Hagen Paul Pfeifer) [Orabug: 25765786] (CVE-2016-10142) - sg_write/bsg_write is not fit to be called under KERNEL_DS (Al Viro) [Orabug: 25765448] (CVE-2016-10088) - scsi: sg: check length passed to SG_NEXT_CMD_LEN (peter chang) [Orabug: 25752011] (CVE-2017-7187) - tty: n_hdlc: get rid of racy n_hdlc.tbuf (Alexander Popov) [Orabug: 25696689] (CVE-2017-2636) - TTY: n_hdlc, fix lockdep false positive (Jiri Slaby) [Orabug: 25696689] (CVE-2017-2636) - drivers/tty/n_hdlc.c: replace kmalloc/memset by kzalloc (Fabian Frederick) [Orabug: 25696689] (CVE-2017-2636) - list: introduce list_first_entry_or_null (Jiri Pirko) [Orabug: 25696689] (CVE-2017-2636) - firewire: net: guard against rx buffer overflows (Stefan Richter) [Orabug: 25451538] (CVE-2016-8633) - x86/mm/32: Enable full randomization on i386 and X86_32 (Hector Marco-Gisbert) [Orabug: 25463929] (CVE-2016-3672) - x86 get_unmapped_area: Access mmap_legacy_base through mm_struct member (Radu Caragea) [Orabug: 25463929] (CVE-2016-3672) - sg_start_req: make sure that there last seen 2020-06-01 modified 2020-06-02 plugin id 99164 published 2017-04-03 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99164 title OracleVM 3.2 : Unbreakable / etc (OVMSA-2017-0058) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2017-0057.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2017-0057 for details. last seen 2020-06-01 modified 2020-06-02 plugin id 99163 published 2017-04-03 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99163 title OracleVM 3.3 : Unbreakable / etc (OVMSA-2017-0057) (Dirty COW) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2017-0105.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : - nfsd: stricter decoding of write-like NFSv2/v3 ops (J. Bruce Fields) [Orabug: 25986990] (CVE-2017-7895) - fnic: Update fnic driver version to 1.6.0.24 (John Sobecki) [Orabug: 24448585] - xen-netfront: Rework the fix for Rx stall during OOM and network stress (Dongli Zhang) [Orabug: 25450703] - xen-netfront: Fix Rx stall during network stress and OOM (Dongli Zhang) [Orabug: 25450703] - ipv6: Skip XFRM lookup if dst_entry in socket cache is valid (Jakub Sitnicki) - uek-rpm: enable CONFIG_KSPLICE. (Jamie Iles) [Orabug: 25549809] - ksplice: add sysctls for determining Ksplice features. (Jamie Iles) - signal: protect SIGNAL_UNKILLABLE from unintentional clearing. (Jamie Iles) [Orabug: 25549809] - VSOCK: Fix lockdep issue. (Dongli Zhang) [Orabug: 25559937] - VSOCK: sock_put wasn last seen 2020-06-01 modified 2020-06-02 plugin id 100237 published 2017-05-17 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/100237 title OracleVM 3.3 : Unbreakable / etc (OVMSA-2017-0105) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2017-3535.NASL description Description of changes: [2.6.39-400.294.6.el6uek] - RHEL: complement upstream workaround for CVE-2016-10142. (Quentin Casasnovas) [Orabug: 25765786] {CVE-2016-10142} {CVE-2016-10142} [2.6.39-400.294.5.el6uek] - net: ping: check minimum size on ICMP header length (Kees Cook) [Orabug: 25766914] {CVE-2016-8399} - ipv6: stop sending PTB packets for MTU < 1280 (Hagen Paul Pfeifer) [Orabug: 25765786] {CVE-2016-10142} - sg_write()/bsg_write() is not fit to be called under KERNEL_DS (Al Viro) [Orabug: 25765448] {CVE-2016-10088} - scsi: sg: check length passed to SG_NEXT_CMD_LEN (peter chang) [Orabug: 25752011] {CVE-2017-7187} [2.6.39-400.294.4.el6uek] - tty: n_hdlc: get rid of racy n_hdlc.tbuf (Alexander Popov) [Orabug: 25696689] {CVE-2017-2636} - TTY: n_hdlc, fix lockdep false positive (Jiri Slaby) [Orabug: 25696689] {CVE-2017-2636} - drivers/tty/n_hdlc.c: replace kmalloc/memset by kzalloc (Fabian Frederick) [Orabug: 25696689] {CVE-2017-2636} - list: introduce list_first_entry_or_null (Jiri Pirko) [Orabug: 25696689] {CVE-2017-2636} - firewire: net: guard against rx buffer overflows (Stefan Richter) [Orabug: 25451538] {CVE-2016-8633} - x86/mm/32: Enable full randomization on i386 and X86_32 (Hector Marco-Gisbert) [Orabug: 25463929] {CVE-2016-3672} - x86 get_unmapped_area: Access mmap_legacy_base through mm_struct member (Radu Caragea) [Orabug: 25463929] {CVE-2016-3672} - sg_start_req(): make sure that there last seen 2020-06-01 modified 2020-06-02 plugin id 99161 published 2017-04-03 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99161 title Oracle Linux 6 : Unbreakable Enterprise kernel (ELSA-2017-3535) NASL family F5 Networks Local Security Checks NASL id F5_BIGIP_SOL57211290.NASL description An issue was discovered in the IPv6 protocol specification, related to ICMP Packet Too Big (PTB) messages. (The scope of this CVE is all affected IPv6 implementations from all vendors.) The security implications of IP fragmentation have been discussed at length in [RFC6274] and [RFC7739]. An attacker can leverage the generation of IPv6 atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow (in scenarios in which actual fragmentation of packets is not needed) and can subsequently perform any type of fragmentation-based attack against legacy IPv6 nodes that do not implement [RFC6946]. That is, employing fragmentation where not actually needed allows for fragmentation-based attack vectors to be employed, unnecessarily. We note that, unfortunately, even nodes that already implement [RFC6946] can be subject to DoS attacks as a result of the generation of IPv6 atomic fragments. Let us assume that Host A is communicating with Host B and that, as a result of the widespread dropping of IPv6 packets that contain extension headers (including fragmentation) [RFC7872], some intermediate node filters fragments between Host B and Host A. If an attacker sends a forged ICMPv6 PTB error message to Host B, reporting an MTU smaller than 1280, this will trigger the generation of IPv6 atomic fragments from that moment on (as required by [RFC2460]). When Host B starts sending IPv6 atomic fragments (in response to the received ICMPv6 PTB error message), these packets will be dropped, since we previously noted that IPv6 packets with extension headers were being dropped between Host B and Host A. Thus, this situation will result in a DoS scenario. Another possible scenario is that in which two BGP peers are employing IPv6 transport and they implement Access Control Lists (ACLs) to drop IPv6 fragments (to avoid control-plane attacks). If the aforementioned BGP peers drop IPv6 fragments but still honor received ICMPv6 PTB error messages, an attacker could easily attack the corresponding peering session by simply sending an ICMPv6 PTB message with a reported MTU smaller than 1280 bytes. Once the attack packet has been sent, the aforementioned routers will themselves be the ones dropping their own traffic. (CVE-2016-10142) last seen 2020-03-17 modified 2017-07-13 plugin id 101493 published 2017-07-13 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/101493 title F5 Networks BIG-IP : IPv6 fragmentation vulnerability (K57211290) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2017-0106.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : - nfsd: stricter decoding of write-like NFSv2/v3 ops (J. Bruce Fields) [Orabug: 25986995] (CVE-2017-7895) - ocfs2/o2net: o2net_listen_data_ready should do nothing if socket state is not TCP_LISTEN (Tariq Saeed) [Orabug: 25510857] - IB/CORE: sync the resouce access in fmr_pool (Wengang Wang) [Orabug: 23750748] - ipv6: Skip XFRM lookup if dst_entry in socket cache is valid (Jakub Sitnicki) [Orabug: 25534688] - uek-rpm: enable CONFIG_KSPLICE. (Jamie Iles) [Orabug: 25549845] - ksplice: add sysctls for determining Ksplice features. (Jamie Iles) - signal: protect SIGNAL_UNKILLABLE from unintentional clearing. (Jamie Iles) [Orabug: 25549845] - KVM: x86: fix emulation of last seen 2020-06-01 modified 2020-06-02 plugin id 100238 published 2017-05-17 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/100238 title OracleVM 3.2 : Unbreakable / etc (OVMSA-2017-0106) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2017-0817.NASL description From Red Hat Security Advisory 2017:0817 : An update for kernel is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es) : * It was discovered that a remote attacker could leverage the generation of IPv6 atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow (in scenarios in which actual fragmentation of packets is not needed) and could subsequently perform any type of a fragmentation-based attack against legacy IPv6 nodes that do not implement RFC6946. (CVE-2016-10142, Moderate) * A flaw was discovered in the way the Linux kernel dealt with paging structures. When the kernel invalidated a paging structure that was not in use locally, it could, in principle, race against another CPU that is switching to a process that uses the paging structure in question. A local user could use a thread running with a stale cached virtual->physical translation to potentially escalate their privileges if the translation in question were writable and the physical page got reused for something critical (for example, a page table). (CVE-2016-2069, Moderate) * A race condition flaw was found in the ioctl_send_fib() function in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 99074 published 2017-03-30 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99074 title Oracle Linux 6 : kernel (ELSA-2017-0817) NASL family Junos Local Security Checks NASL id JUNIPER_JSA10780.NASL description According to its self-reported version number, the remote Juniper Junos device is affected by a denial of service vulnerability in the ICMP Packet Too Big (PTB) message functionality that occurs when handling IPv6 atomic fragments that trigger fragmentation in traffic. An unauthenticated, remote attacker can exploit this issue, via a specially crafted series of packets, to cause the device to stop responding, the exhaustion of resources, or other impact that results in a denial of service condition. last seen 2020-03-18 modified 2017-07-06 plugin id 101266 published 2017-07-06 reporter This script is Copyright (C) 2017-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/101266 title Juniper Junos ICMPv6 PTB Atomic Fragment DoS (JSA10780) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0152_KERNEL.NASL description The remote NewStart CGSL host, running version MAIN 4.05, has kernel packages installed that are affected by multiple vulnerabilities: - It was found that AIO interface didn last seen 2020-06-01 modified 2020-06-02 plugin id 127425 published 2019-08-12 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/127425 title NewStart CGSL MAIN 4.05 : kernel Multiple Vulnerabilities (NS-SA-2019-0152)
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References
- https://tools.ietf.org/html/rfc8021
- https://tools.ietf.org/html/draft-ietf-6man-deprecate-atomfrag-generation-08
- http://www.securityfocus.com/bid/95797
- http://www.securitytracker.com/id/1038256
- http://rhn.redhat.com/errata/RHSA-2017-0817.html
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43730
- https://support.f5.com/csp/article/K57211290?utm_source=f5support&%3Butm_medium=RSS