Juniper Junos CLI libc recomp() rpd DoS (JSA10612)

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

include("compat.inc");

if (description)
{
  script_id(72001);
  script_version("1.4");
  script_cvs_date("Date: 2018/07/12 19:01:15");

  script_cve_id("CVE-2010-4051", "CVE-2010-4052");
  script_bugtraq_id(45233);
  script_xref(name:"JSA", value:"JSA10612");

  script_name(english:"Juniper Junos CLI libc recomp() rpd DoS (JSA10612)");
  script_summary(english:"Checks the Junos version and build date.");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the remote Juniper
Junos device is affected by a denial of service vulnerability in the
regcomp implementation of the GNU C Library used in the command-line
interpreter (CLI). A attacker can exploit this vulnerability to crash
the RE by using a crafted regular expression containing adjacent
repetition operators or adjacent bounded repetitions.");
  script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10612");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos upgrade referenced in Juniper advisory
JSA10612.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/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:"2014/01/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/09/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/01/16");

  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) 2014-2018 Tenable Network Security, Inc.");

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

  exit(0);
}

include("audit.inc");
include("junos.inc");
include("misc_func.inc");

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

if (compare_build_dates(build_date, '2013-12-12') >= 0)
  audit(AUDIT_INST_VER_NOT_VULN, 'Junos', ver + ' (build date ' + build_date + ')');
if (ver == '11.4R9-S1' || ver == '13.1R3-S1')
  audit(AUDIT_INST_VER_NOT_VULN, 'Junos', ver);

fixes = make_array();
fixes['10.4'] = '10.4S15';
fixes['11.4'] = '11.4R10';
fixes['12.1'] = '12.1R8';
fixes['12.1X44'] = '12.1X44-D25';
fixes['12.1X45'] = '12.1X45-D15';
fixes['12.1X46'] = '12.1X46-D10';
fixes['12.2'] = '12.2R6';
fixes['12.3'] = '12.3R4';
fixes['13.1'] = '13.1R3';
fixes['13.2'] = '13.2R2';

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

if (report_verbosity > 0)
{
  report = get_report(ver:ver, fix:fix);
  security_note(port:0, extra:report);
}
else security_note(0);