CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
5.1%
The version of Junos OS installed on the remote host is affected by a vulnerability as referenced in the JSA11242 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(154124);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/01/13");
script_cve_id("CVE-2021-31377");
script_xref(name:"JSA", value:"JSA11242");
script_xref(name:"IAVA", value:"2021-A-0478-S");
script_name(english:"Juniper Junos OS Vulnerability (JSA11242)");
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 JSA11242
advisory.
- An Incorrect Permission Assignment for Critical Resource vulnerability of a certain file in the filesystem
of Junos OS allows a local authenticated attacker to cause routing process daemon (RPD) to crash and
restart, causing a Denial of Service (DoS). Repeated actions by the attacker will create a sustained
Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 15.1 versions prior to
15.1R7-S9; 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13, 17.4R3-S5; 18.1 versions
prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions
prior to 18.4R2-S8, 18.4R3-S7; 19.1 versions prior to 19.1R2-S3, 19.1R3-S5; 19.2 versions prior to
19.2R3-S2; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4,
19.4R3-S2; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R2-S3, 20.2R3; 20.3
versions prior to 20.3R3; 20.4 versions prior to 20.4R1-S1, 20.4R2. (CVE-2021-31377)
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://kb.juniper.net/JSA11242");
script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper advisory JSA11242");
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:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-31377");
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:"2021/10/13");
script_set_attribute(attribute:"patch_publication_date", value:"2021/10/13");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/13");
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');
var ver = get_kb_item_or_exit('Host/Juniper/JUNOS/Version');
var vuln_ranges = [
{'min_ver':'15.1', 'fixed_ver':'15.1R7-S9'},
{'min_ver':'17.3', 'fixed_ver':'17.3R3-S12'},
{'min_ver':'17.4', 'fixed_ver':'17.4R2-S13'},
{'min_ver':'17.4R3', 'fixed_ver':'17.4R3-S5'},
{'min_ver':'18.1', 'fixed_ver':'18.1R3-S13'},
{'min_ver':'18.2', 'fixed_ver':'18.2R3-S8'},
{'min_ver':'18.3', 'fixed_ver':'18.3R3-S5'},
{'min_ver':'18.4', 'fixed_ver':'18.4R2-S8'},
{'min_ver':'18.4R3', 'fixed_ver':'18.4R3-S7'},
{'min_ver':'19.1', 'fixed_ver':'19.1R2-S3'},
{'min_ver':'19.1R3', 'fixed_ver':'19.1R3-S5'},
{'min_ver':'19.2', 'fixed_ver':'19.2R3-S2'},
{'min_ver':'19.3', 'fixed_ver':'19.3R2-S6'},
{'min_ver':'19.3R3', 'fixed_ver':'19.3R3-S2'},
{'min_ver':'19.4', 'fixed_ver':'19.4R1-S4', 'fixed_display':'19.4R1-S4, 19.4R2-S4'},
{'min_ver':'19.4R2', 'fixed_ver':'19.4R3-S2'},
{'min_ver':'20.1', 'fixed_ver':'20.1R2-S2', 'fixed_display':'20.1R2-S2, 20.1R3'},
{'min_ver':'20.2', 'fixed_ver':'20.2R2-S3', 'fixed_display':'20.2R2-S3, 20.2R3'},
{'min_ver':'20.3', 'fixed_ver':'20.3R3'},
{'min_ver':'20.4', 'fixed_ver':'20.4R1-S1', 'fixed_display':'20.4R1-S1, 20.4R2'}
];
var 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);
var report = get_report(ver:ver, fix:fix);
security_report_v4(severity:SECURITY_NOTE, port:0, extra:report);
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
5.1%