CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:A/AC:M/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
25.0%
The version of Junos OS installed on the remote host is affected by a vulnerability as referenced in the JSA11191 advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(151637);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/01/26");
script_xref(name:"JSA", value:"JSA11191");
script_xref(name:"IAVA", value:"2021-A-0324-S");
script_name(english:"Juniper Junos OS Vulnerability (JSA11191)");
script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
script_set_attribute(attribute:"description", value:
"The version of Junos OS installed on the remote host is affected by a vulnerability as referenced in the JSA11191
advisory.
- When user-defined ARP Policer is configured and applied on one or more Aggregated Ethernet (AE) interface
units, a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability between the Device Control Daemon
(DCD) and firewall process (dfwd) daemons of Juniper Networks Junos OS allows an attacker to bypass the
user-defined ARP Policer. In this particular case the User ARP policer is replaced with default ARP
policer. (CVE-2021-0289)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0289");
script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/JSA11191");
script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper advisory JSA11191");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:P/A:P");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-0289");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/07/14");
script_set_attribute(attribute:"patch_publication_date", value:"2021/07/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/07/14");
script_set_attribute(attribute:"plugin_type", value:"combined");
script_set_attribute(attribute:"cpe", value:"cpe:/o:juniper:junos");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Junos Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("junos_version.nasl");
script_require_keys("Host/Juniper/JUNOS/Version");
exit(0);
}
include('junos.inc');
ver = get_kb_item_or_exit('Host/Juniper/JUNOS/Version');
vuln_ranges = [
{'min_ver':'19.4', 'fixed_ver':'19.4R3-S3'},
{'min_ver':'20.1', 'fixed_ver':'20.1R3'},
{'min_ver':'20.2', 'fixed_ver':'20.2R3-S2'},
{'min_ver':'20.4', 'fixed_ver':'20.4R3'},
{'min_ver':'21.1', 'fixed_ver':'21.1R2'},
{'min_ver':'18.4', 'fixed_ver':'18.4R2-S9'}
];
fix = junos_compare_range(target_version:ver, vuln_ranges:vuln_ranges);
if (empty_or_null(fix)) audit(AUDIT_INST_VER_NOT_VULN, 'Junos OS', ver);
report = get_report(ver:ver, fix:fix);
security_report_v4(severity:SECURITY_HOLE, port:0, extra:report);
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:A/AC:M/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
25.0%