Juniper Junos sendmsg Local Privilege Escalation (JSA10797)

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(102072);
  script_version ("1.3");
  script_cvs_date("Date: 2018/07/12 19:01:16");

  script_cve_id("CVE-2016-1887");
  script_bugtraq_id(90732);
  script_xref(name:"JSA", value:"JSA10797");

  script_name(english:"Juniper Junos sendmsg Local Privilege Escalation (JSA10797)");
  script_summary(english:"Checks the Junos version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is affected by a privilege escalation vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the remote Juniper
Junos device is affected by a heap-based buffer overflow condition in
the sendmsg system call, specifically due to incorrect handling of
arguments in the sockargs() function in sys/kern/uipc_syscalls.c. A
local attacker can exploit this to overwrite large portions of the
kernel memory, resulting in a denial of service condition or the
execution of arbitrary code with elevated privileges.");
  script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10797");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant Junos software release referenced in Juniper
security advisory JSA10797.");
  script_set_cvss_base_vector("CVSS2#AV:L/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:L/AC:L/PR:L/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:"vuln_publication_date", value:"2016/05/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/07/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/07/31");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:juniper:junos");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Junos Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2017-2018 Tenable Network Security, Inc.");

  script_dependencies("junos_version.nasl");
  script_require_keys("Host/Juniper/JUNOS/Version");

  exit(0);
}

include("audit.inc");
include("junos_kb_cmd_func.inc");

ver   = get_kb_item_or_exit('Host/Juniper/JUNOS/Version');

fixes = make_array();

fixes['14.1X53'] = '14.1X53-D40';
fixes['14.2']    = '14.2R7';
fixes['15.1']    = '15.1R5';
fixes['15.1F5']  = '15.1F5-S3';
fixes['15.1F6']  = '15.1F6-S1';
fixes['15.1X49'] = '15.1X49-D60';
fixes['15.1X53'] = '15.1X53-D60';

fix = check_junos(ver:ver, fixes:fixes, exit_on_fail:TRUE);

junos_report(ver:ver, fix:fix, severity:SECURITY_HOLE);