Juniper Networks Junos OS Stack Exhaustion Denial of Service Vulnerability

# SPDX-FileCopyrightText: 2014 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/o:juniper:junos";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.103966");
  script_version("2023-07-26T05:05:09+0000");
  script_tag(name:"last_modification", value:"2023-07-26 05:05:09 +0000 (Wed, 26 Jul 2023)");
  script_tag(name:"creation_date", value:"2014-01-09 22:21:03 +0700 (Thu, 09 Jan 2014)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");

  script_tag(name:"qod_type", value:"package");

  script_tag(name:"solution_type", value:"VendorFix");

  script_cve_id("CVE-2010-4051", "CVE-2010-4052");

  script_name("Juniper Networks Junos OS Stack Exhaustion Denial of Service Vulnerability");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2014 Greenbone AG");
  script_family("JunOS Local Security Checks");
  script_dependencies("gb_juniper_junos_consolidation.nasl");
  script_mandatory_keys("juniper/junos/detected", "juniper/junos/build");

  script_tag(name:"summary", value:"Denial of Service vulnerability due to stack exhaustion in glibc
used by Junos");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable OS build is present on the target host.");

  script_tag(name:"insight", value:"A stack consumption vulnerability in the regcomp implementation
in the GNU C Library allows an attacker to cause a denial of service via a regular expression containing
adjacent repetition operators or adjacent bounded repetitions. Junos uses regular expressions in several
places within the CLI.");

  script_tag(name:"impact", value:"Local attackers can cause a partial denial of service on services
provided by rpd.");

  script_tag(name:"affected", value:"Junos OS 10.4, 11.4, 12.1, 12.2, 12.3, 13.1, 13.2, 13.3");

  script_tag(name:"solution", value:"New builds of Junos OS software are available from Juniper.");

  script_xref(name:"URL", value:"http://kb.juniper.net/JSA10612");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/45233");

  exit(0);
}

include("host_details.inc");
include("revisions-lib.inc");

if (!version = get_app_version(cpe: CPE, nofork: TRUE))
  exit(0);

build = get_kb_item("juniper/junos/build");
if (!build)
  exit(0);

desc += "Version/Build-Date:
" + version + " / " + build;

build2check = str_replace(string:build, find:"-", replace:"");

if (revcomp(a:build2check, b:"20131212") >= 0) {
  exit(99);
}

if (revcomp(a:version, b:"10.4R16") < 0) {
  security_message(port:0, data:desc);
  exit(0);
}

if (version =~ "^10\.4S") {
  if (revcomp(a:version, b:"10.4S15") < 0) {
    security_message(port:0, data:desc);
    exit(0);
  }
}

if (version =~ "^11") {
  if ((revcomp(a:version, b:"11.4R10") < 0) &&
      (revcomp(a:version, b:"11.4R9-S1") >= 0)) {
    security_message(port:0, data:desc);
    exit(0);
  }
}

if (version =~ "^12") {
  if (version =~ "^12\.2") {
    if (revcomp(a:version, b:"12.2R6") < 0) {
      security_message(port:0, data:desc);
      exit(0);
    }
  } else if (version =~ "^12\.3") {
    if (revcomp(a:version, b:"12.3R4") < 0) {
      security_message(port:0, data:desc);
      exit(0);
    }
  } else if (revcomp(a:version, b:"12.1R8") < 0) {
    security_message(port:0, data:desc);
    exit(0);
  } else if ((revcomp(a:version, b:"12.1X44-D15") < 0) &&
             (revcomp(a:version, b:"12.1X") >= 0)) {
    security_message(port:0, data:desc);
    exit(0);
  } else if ((revcomp(a:version, b:"12.1X45-D15") < 0) &&
             (revcomp(a:version, b:"12.1X45") >= 0)) {
    security_message(port:0, data:desc);
    exit(0);
  } else if ((revcomp(a:version, b:"12.1X46-D10") < 0) &&
             (revcomp(a:version, b:"12.1X46") >= 0)) {
    security_message(port:0, data:desc);
    exit(0);
  }
}

if (version =~ "^13") {
  if (revcomp(a:version, b:"13.1R3-S1") < 0) {
    security_message(port:0, data:desc);
    exit(0);
  } else if ((revcomp(a:version, b:"13.2R2") < 0) &&
             (revcomp(a:version, b:"13.2") >= 0)) {
    security_message(port:0, data:desc);
    exit(0);
  } else if ((revcomp(a:version, b:"13.3R1") < 0) &&
             (revcomp(a:version, b:"13.3") >= 0)) {
    security_message(port:0, data:desc);
    exit(0);
  }
}

exit(99);