Juniper Networks Junos OS mbuf Denial of Service Vulnerability

# SPDX-FileCopyrightText: 2015 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("1.3.6.1.4.1.25623.1.0.106020");
  script_version("2023-07-25T05:05:58+0000");
  script_tag(name:"last_modification", value:"2023-07-25 05:05:58 +0000 (Tue, 25 Jul 2023)");
  script_tag(name:"creation_date", value:"2015-07-14 10:58:02 +0700 (Tue, 14 Jul 2015)");
  script_tag(name:"cvss_base", value:"7.1");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:C");

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

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

  script_cve_id("CVE-2015-5358");

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

  script_category(ACT_GATHER_INFO);

  script_family("JunOS Local Security Checks");
  script_copyright("Copyright (C) 2015 Greenbone AG");
  script_dependencies("gb_juniper_junos_consolidation.nasl");
  script_mandatory_keys("juniper/junos/detected");

  script_tag(name:"summary", value:"Junos OS is prone to a DoS vulnerability by mbuf exhaustion.");

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

  script_tag(name:"insight", value:"When an active TCP connection transitions to LAST_ACK state and
the daemon connected to the socket still has more data to send, the socket could get stuck in LAST_ACK
state indefinitely, using up finite mbufs and connections. Exploitation of this issue requires establishment
of a TCP connection to a listening port on the router. TCP ports protected by ingress and/or control plane
firewall filters are not vulnerable to this issue. However, anti-spoofing mechanisms should be employed
to protect against malicious attempts to bypass existing firewall filters.");

  script_tag(name:"impact", value:"Triggering the condition repeatedly could lead to total mbuf exhaustion,
requiring a reboot or switchover of the master RE to resolve.");

  script_tag(name:"affected", value:"Junos OS 12.1, 12.3, 13.2, 13.3, 14.1 and 14.2");

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

  script_xref(name:"URL", value:"http://kb.juniper.net/JSA10686");

  exit(0);
}

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

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

if (version =~ "^12") {
  if ((revcomp(a: version, b: "12.1X44-D50") < 0) &&
      (revcomp(a: version, b: "12.1X44") >= 0)) {
    security_message(port:0, data:version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "12.1X46-D35") < 0) &&
           (revcomp(a: version, b: "12.1X46") >= 0)) {
    security_message(port:0, data:version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "12.1X47-D25") < 0) &&
           (revcomp(a: version, b: "12.1X47") >= 0)) {
    security_message(port:0, data:version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "12.3R9") < 0) &&
           (revcomp(a: version, b: "12.3") >= 0)) {
    security_message(port:0, data:version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "12.3X48-D15") < 0) &&
           (revcomp(a: version, b: "12.3X48") >= 0)) {
    security_message(port:0, data:version);
    exit(0);
  }
}

if (version =~ "^13") {
  if (revcomp(a: version, b: "13.2R7") < 0) {
    security_message(port:0, data:version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "13.2X51-D35") < 0) &&
           (revcomp(a: version, b: "13.2X51") >= 0)) {
    security_message(port:0, data:version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "13.2X52-D25") < 0) &&
           (revcomp(a: version, b: "13.2X52") >= 0)) {
    security_message(port:0, data:version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "13.3R6") < 0) &&
           (revcomp(a: version, b: "13.3") >= 0)) {
    security_message(port:0, data:version);
    exit(0);
  }
}

if (version =~ "^14") {
  if (revcomp(a: version, b: "14.1R3-S2") < 0) {
    security_message(port:0, data:version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "14.1X53-D12") < 0) &&
           (revcomp(a: version, b: "14.1X53") >= 0)) {
    security_message(port:0, data:version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "14.1X55-D25") < 0) &&
           (revcomp(a: version, b: "14.1X55") >= 0)) {
    security_message(port:0, data:version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "14.2R2") < 0) &&
           (revcomp(a: version, b: "14.2") >= 0)) {
    security_message(port:0, data:version);
    exit(0);
  }
}

exit(99);