CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS
Percentile
42.5%
The version of Junos OS installed on the remote host is prior to 16.1R7-S6, 16.2R2-S11, 17.1R2-S11, 17.2R1-S9, 17.2X75-D105, 17.3R2-S5, 17.4R2-S8, 18.1R3-S8, 18.2R2-S6, 18.2X75-D12, 18.3R1-S6, 18.4R1-S5, 19.1R1-S3, or 19.2R1-S2.
It is, therefore, affected by a denial of service (DoS) vulnerability. An unauthenticated, remote attacker can exploit this, by sending a specific BGP UPDATE message, in order to cause other peers to terminate the established BGP session as referenced in the JSA11013 advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#
# (C) Tenable Network Security, Inc.
#
include('compat.inc');
if (description)
{
script_id(136828);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/20");
script_cve_id("CVE-2020-1632");
script_xref(name:"JSA", value:"JSA11013");
script_xref(name:"IAVA", value:"2020-A-0162-S");
script_name(english:"Junos OS Invalid BGP Update Termination Denial Of Service Vulnerability (JSA11013)");
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 prior to 16.1R7-S6, 16.2R2-S11, 17.1R2-S11, 17.2R1-S9,
17.2X75-D105, 17.3R2-S5, 17.4R2-S8, 18.1R3-S8, 18.2R2-S6, 18.2X75-D12, 18.3R1-S6, 18.4R1-S5, 19.1R1-S3, or 19.2R1-S2.
It is, therefore, affected by a denial of service (DoS) vulnerability. An unauthenticated, remote attacker can exploit
this, by sending a specific BGP UPDATE message, in order to cause other peers to terminate the established BGP session
as referenced in the JSA11013 advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported
version number.");
# https://supportportal.juniper.net/s/article/2020-04-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-Invalid-BGP-UPDATE-sent-to-peer-device-may-cause-BGP-session-to-terminate-CVE-2020-1632
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a65f26a6");
script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper advisory JSA11013");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/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-2020-1632");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/08");
script_set_attribute(attribute:"patch_publication_date", value:"2020/04/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/25");
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) 2020-2023 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':'16.1', 'fixed_ver':'16.1R7-S6'},
{'min_ver':'16.2', 'fixed_ver':'16.2R2-S11'},
{'min_ver':'17.1', 'fixed_ver':'17.1R2-S11'},
{'min_ver':'17.1R3', 'fixed_ver':'17.1R3-S2'},
{'min_ver':'17.2', 'fixed_ver':'17.2R1-S9', 'fixed_display':'17.2R1-S9, 17.2R2-S8'},
{'min_ver':'17.2R2', 'fixed_ver':'17.2R3-S3'},
{'min_ver':'17.2X75', 'fixed_ver':'17.2X75-D105', 'fixed_display':'17.2X75-D105, 17.2X75-D110, 17.2X75-D44'},
{'min_ver':'17.3', 'fixed_ver':'17.3R2-S5'},
{'min_ver':'17.3R3', 'fixed_ver':'17.3R3-S7'},
{'min_ver':'17.4', 'fixed_ver':'17.4R2-S8', 'fixed_display':'17.4R2-S8, 17.4R3'},
{'min_ver':'18.1', 'fixed_ver':'18.1R3-S8'},
{'min_ver':'18.2', 'fixed_ver':'18.2R2-S6'},
{'min_ver':'18.2R3', 'fixed_ver':'18.2R3-S2'},
{'min_ver':'18.2X75', 'fixed_ver':'18.2X75-D12', 'fixed_display':'18.2X75-D12, 18.2X75-D33, 18.2X75-D411, 18.2X75-D420, 18.2X75-D51, 18.2X75-D60'},
{'min_ver':'18.3', 'fixed_ver':'18.3R1-S6', 'fixed_display':'18.3R1-S6, 18.3R2-S3, 18.3R3'},
{'min_ver':'18.4', 'fixed_ver':'18.4R1-S5', 'fixed_display':'18.4R1-S5, 18.4R2, 18.4R3'},
{'min_ver':'19.1', 'fixed_ver':'19.1R1-S3', 'fixed_display':'19.1R1-S3, 19.1R2'},
{'min_ver':'19.2', 'fixed_ver':'19.2R1-S2', 'fixed_display':'19.2R1-S2, 19.2R2'}
];
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_HOLE, port:0, extra:report);
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS
Percentile
42.5%