Vulnerabilities > CVE-2015-2686 - Permissions, Privileges, and Access Controls vulnerability in Linux Kernel 3.19/3.19.1/3.19.2

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2017-3658.
#

include("compat.inc");

if (description)
{
  script_id(105145);
  script_version("3.18");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2014-9710", "CVE-2015-1465", "CVE-2015-2686", "CVE-2015-4167", "CVE-2016-10044", "CVE-2016-10200", "CVE-2016-9604", "CVE-2016-9685", "CVE-2017-1000111", "CVE-2017-1000251", "CVE-2017-1000253", "CVE-2017-1000363", "CVE-2017-1000364", "CVE-2017-1000365", "CVE-2017-1000380", "CVE-2017-10661", "CVE-2017-11176", "CVE-2017-11473", "CVE-2017-12134", "CVE-2017-12190", "CVE-2017-14489", "CVE-2017-2671", "CVE-2017-7273", "CVE-2017-7308", "CVE-2017-7542", "CVE-2017-7645", "CVE-2017-7889", "CVE-2017-8831", "CVE-2017-9074", "CVE-2017-9075", "CVE-2017-9077", "CVE-2017-9242");

  script_name(english:"Oracle Linux 6 : Unbreakable Enterprise kernel (ELSA-2017-3658) (BlueBorne) (Stack Clash)");
  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:

[2.6.39-400.298.1.el6uek]
- ocfs2/dlm: ignore cleaning the migration mle that is inuse (xuejiufei) 
  [Orabug: 23320090]
- tty: Fix race in pty_write() leading to NULL deref (Todd Vierling) 
[Orabug: 24337879]
- xen-netfront: cast grant table reference first to type int (Dongli 
Zhang)  [Orabug: 25102637]
- xen-netfront: do not cast grant table reference to signed short 
(Dongli Zhang)  [Orabug: 25102637]
- RDS: Print failed rdma op details if failure is remote access error 
(Rama Nichanamatlu)  [Orabug: 25440316]
- ping: implement proper locking (Eric Dumazet)  [Orabug: 26540288] 
{CVE-2017-2671}
- KEYS: fix dereferencing NULL payload with nonzero length (Eric 
Biggers)  [Orabug: 26592013]
- oracleasm: Copy the integrity descriptor (Martin K. Petersen) 
[Orabug: 26650039]
- mm: Tighten x86 /dev/mem with zeroing reads (Kees Cook)  [Orabug: 
26675934]  {CVE-2017-7889}
- fs: __generic_file_splice_read retry lookup on AOP_TRUNCATED_PAGE 
(Abhi Das)  [Orabug: 26797307]
- xscore: add dma address check (Zhu Yanjun)  [Orabug: 27058559]
- more bio_map_user_iov() leak fixes (Al Viro)  [Orabug: 27069045] 
{CVE-2017-12190}
- fix unbalanced page refcounting in bio_map_user_iov (Vitaly 
Mayatskikh)  [Orabug: 27069045]  {CVE-2017-12190}
- xsigo: [backport] Fix race in freeing aged Forwarding tables (Pradeep 
Gopanapalli)  [Orabug: 24823234]
- ocfs2: fix deadlock issue when taking inode lock at vfs entry points 
(Eric Ren)  [Orabug: 25671723]
- ocfs2/dlmglue: prepare tracking logic to avoid recursive cluster lock 
(Eric Ren)  [Orabug: 25671723]
- net/packet: fix overflow in check for tp_reserve (Andrey Konovalov) 
[Orabug: 26143563]  {CVE-2017-7308}
- net/packet: fix overflow in check for tp_frame_nr (Andrey Konovalov) 
[Orabug: 26143563]  {CVE-2017-7308}
- char: lp: fix possible integer overflow in lp_setup() (Willy Tarreau) 
[Orabug: 26403941]  {CVE-2017-1000363}
- ALSA: timer: Fix missing queue indices reset at 
SNDRV_TIMER_IOCTL_SELECT (Takashi Iwai)  [Orabug: 26403958] 
{CVE-2017-1000380}
- ALSA: timer: Fix race between read and ioctl (Takashi Iwai)  [Orabug: 
26403958]  {CVE-2017-1000380}
- ALSA: timer: fix NULL pointer dereference in read()/ioctl() race 
(Vegard Nossum)  [Orabug: 26403958]  {CVE-2017-1000380}
- ALSA: timer: Fix negative queue usage by racy accesses (Takashi Iwai) 
[Orabug: 26403958]  {CVE-2017-1000380}
- ALSA: timer: Fix race at concurrent reads (Takashi Iwai)  [Orabug: 
26403958]  {CVE-2017-1000380}
- ALSA: timer: Fix race among timer ioctls (Takashi Iwai)  [Orabug: 
26403958]  {CVE-2017-1000380}
- ipv6: xfrm: Handle errors reported by xfrm6_find_1stfragopt() (Ben 
Hutchings)  [Orabug: 26403974]  {CVE-2017-9074}
- ipv6: Check ip6_find_1stfragopt() return value properly. (David S. 
Miller)  [Orabug: 26403974]  {CVE-2017-9074}
- ipv6: Prevent overrun when parsing v6 header options (Craig Gallek) 
[Orabug: 26403974]  {CVE-2017-9074}
- ipv6/dccp: do not inherit ipv6_mc_list from parent (WANG Cong) 
[Orabug: 26404007]  {CVE-2017-9077}
- aio: mark AIO pseudo-fs noexec (Jann Horn)  [Orabug: 26643601] 
{CVE-2016-10044}
- vfs: Commit to never having exectuables on proc and sysfs. (Eric W. 
Biederman)  [Orabug: 26643601]  {CVE-2016-10044}
- vfs, writeback: replace FS_CGROUP_WRITEBACK with SB_I_CGROUPWB (Tejun 
Heo)  [Orabug: 26643601]  {CVE-2016-10044}
- x86/acpi: Prevent out of bound access caused by broken ACPI tables 
(Seunghun Han)  [Orabug: 26643652]  {CVE-2017-11473}
- sctp: do not inherit ipv6_{mc|ac|fl}_list from parent (Eric Dumazet) 
[Orabug: 26650889]  {CVE-2017-9075}
- saa7164: fix double fetch PCIe access condition (Steven Toth) 
[Orabug: 26675148]  {CVE-2017-8831}
- saa7164: fix sparse warnings (Hans Verkuil)  [Orabug: 26675148] 
{CVE-2017-8831}
- saa7164: get rid of warning: no previous prototype (Mauro Carvalho 
Chehab)  [Orabug: 26675148]  {CVE-2017-8831}
- [scsi] lpfc 8.3.44: Fix kernel panics from corrupted ndlp (James 
Smart)  [Orabug: 26765341]
- timerfd: Protect the might cancel mechanism proper (Thomas Gleixner) 
[Orabug: 26899791]  {CVE-2017-10661}
- scsi: scsi_transport_iscsi: fix the issue that iscsi_if_rx doesn't 
parse nlmsg properly (Xin Long)  [Orabug: 26988628]  {CVE-2017-14489}
- mqueue: fix a use-after-free in sys_mq_notify() (Cong Wang)  [Orabug: 
26643562]  {CVE-2017-11176}
- ipv6: avoid overflow of offset in ip6_find_1stfragopt (Sabrina 
Dubroca)  [Orabug: 27011278]  {CVE-2017-7542}
- packet: fix tp_reserve race in packet_set_ring (Willem de Bruijn) 
[Orabug: 27002453]  {CVE-2017-1000111}
- mlx4_core: calculate log_mtt based on total system memory (Wei Lin 
Guay)  [Orabug: 26867355]
- xen/x86: Add interface for querying amount of host memory (Boris 
Ostrovsky)  [Orabug: 26867355]
- fs/binfmt_elf.c: fix bug in loading of PIE binaries (Michael Davidson) 
  [Orabug: 26870958]  {CVE-2017-1000253}
- Bluetooth: Properly check L2CAP config option output buffer length 
(Ben Seri)  [Orabug: 26796428]  {CVE-2017-1000251}
- xen: fix bio vec merging (Roger Pau Monne)  [Orabug: 26645562] 
{CVE-2017-12134}
- fs/exec.c: account for argv/envp pointers (Kees Cook)  [Orabug: 
26638926]  {CVE-2017-1000365} {CVE-2017-1000365}
- l2tp: fix racy SOCK_ZAPPED flag check in l2tp_ip{,6}_bind() (Guillaume 
Nault)  [Orabug: 26586050]  {CVE-2016-10200}
- xfs: fix two memory leaks in xfs_attr_list.c error paths (Mateusz 
Guzik)  [Orabug: 26586024]  {CVE-2016-9685}
- KEYS: Disallow keyrings beginning with '.' to be joined as session 
keyrings (David Howells)  [Orabug: 26586002]  {CVE-2016-9604}
- ipv6: fix out of bound writes in __ip6_append_data() (Eric Dumazet) 
[Orabug: 26578202]  {CVE-2017-9242}
- selinux: quiet the filesystem labeling behavior message (Paul Moore) 
[Orabug: 25721485]
- RDS/IB: active bonding port state fix for intfs added late (Mukesh 
Kacker)  [Orabug: 25875426]
- HID: hid-cypress: validate length of report (Greg Kroah-Hartman) 
[Orabug: 25891914]  {CVE-2017-7273}
- udf: Remove repeated loads blocksize (Jan Kara)  [Orabug: 25905722] 
{CVE-2015-4167}
- udf: Check length of extended attributes and allocation descriptors 
(Jan Kara)  [Orabug: 25905722]  {CVE-2015-4167}
- udf: Verify i_size when loading inode (Jan Kara)  [Orabug: 25905722] 
{CVE-2015-4167}
- btrfs: drop unused parameter from btrfs_item_nr (Ross Kirk)  [Orabug: 
25948102]  {CVE-2014-9710}
- Btrfs: cleanup of function where fixup_low_keys() is called (Tsutomu 
Itoh)  [Orabug: 25948102]  {CVE-2014-9710}
- Btrfs: remove unused argument of fixup_low_keys() (Tsutomu Itoh) 
[Orabug: 25948102]  {CVE-2014-9710}
- Btrfs: remove unused argument of btrfs_extend_item() (Tsutomu Itoh) 
[Orabug: 25948102]  {CVE-2014-9710}
- Btrfs: add support for asserts (Josef Bacik)  [Orabug: 25948102] 
{CVE-2014-9710}
- Btrfs: make xattr replace operations atomic (Filipe Manana)  [Orabug: 
25948102]  {CVE-2014-9710}
- net: validate the range we feed to iov_iter_init() in 
sys_sendto/sys_recvfrom (Al Viro)  [Orabug: 25948149]  {CVE-2015-2686}
- xsigo: Compute node crash on FC failover (Joe Jin)  [Orabug: 25965445]
- PCI: Prevent VPD access for QLogic ISP2722 (Ethan Zhao)  [Orabug: 
25975513]
- PCI: Prevent VPD access for buggy devices (Babu Moger)  [Orabug: 
25975513]
- ipv4: try to cache dst_entries which would cause a redirect (Hannes 
Frederic Sowa)  [Orabug: 26032377]  {CVE-2015-1465}
- mm: larger stack guard gap, between vmas (Hugh Dickins)  [Orabug: 
26326145]  {CVE-2017-1000364}
- nfsd: check for oversized NFSv2/v3 arguments (J. Bruce Fields) 
[Orabug: 26366024]  {CVE-2017-7645}
- dm mpath: allow ioctls to trigger pg init (Mikulas Patocka)  [Orabug: 
25645229]
- xen/manage: Always freeze/thaw processes when suspend/resuming (Ross 
Lagerwall)  [Orabug: 25795530]
- lpfc cannot establish connection with targets that send PRLI under P2P 
mode (Joe Jin)  [Orabug: 25955028]"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2017-December/007409.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:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/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:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'AF_PACKET packet_set_ring Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", 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:"2015/04/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/12/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/11");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 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-2014-9710", "CVE-2015-1465", "CVE-2015-2686", "CVE-2015-4167", "CVE-2016-10044", "CVE-2016-10200", "CVE-2016-9604", "CVE-2016-9685", "CVE-2017-1000111", "CVE-2017-1000251", "CVE-2017-1000253", "CVE-2017-1000363", "CVE-2017-1000364", "CVE-2017-1000365", "CVE-2017-1000380", "CVE-2017-10661", "CVE-2017-11176", "CVE-2017-11473", "CVE-2017-12134", "CVE-2017-12190", "CVE-2017-14489", "CVE-2017-2671", "CVE-2017-7273", "CVE-2017-7308", "CVE-2017-7542", "CVE-2017-7645", "CVE-2017-7889", "CVE-2017-8831", "CVE-2017-9074", "CVE-2017-9075", "CVE-2017-9077", "CVE-2017-9242");  
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for ELSA-2017-3658");
  }
  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-2.6.39-400.298.1.el6uek")) flag++;
if (rpm_exists(release:"EL6", rpm:"kernel-uek-debug-2.6.39") && rpm_check(release:"EL6", reference:"kernel-uek-debug-2.6.39-400.298.1.el6uek")) flag++;
if (rpm_exists(release:"EL6", rpm:"kernel-uek-debug-devel-2.6.39") && rpm_check(release:"EL6", reference:"kernel-uek-debug-devel-2.6.39-400.298.1.el6uek")) flag++;
if (rpm_exists(release:"EL6", rpm:"kernel-uek-devel-2.6.39") && rpm_check(release:"EL6", reference:"kernel-uek-devel-2.6.39-400.298.1.el6uek")) flag++;
if (rpm_exists(release:"EL6", rpm:"kernel-uek-doc-2.6.39") && rpm_check(release:"EL6", reference:"kernel-uek-doc-2.6.39-400.298.1.el6uek")) flag++;
if (rpm_exists(release:"EL6", rpm:"kernel-uek-firmware-2.6.39") && rpm_check(release:"EL6", reference:"kernel-uek-firmware-2.6.39-400.298.1.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");
}