Vulnerabilities > CVE-2020-1601 - Improper Input Validation vulnerability in Juniper Junos
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
PARTIAL Summary
Certain types of malformed Path Computation Element Protocol (PCEP) packets when received and processed by a Juniper Networks Junos OS device serving as a Path Computation Client (PCC) in a PCEP environment using Juniper's path computational element protocol daemon (pccd) process allows an attacker to cause the pccd process to crash and generate a core file thereby causing a Denial of Service (DoS). Continued receipt of this family of malformed PCEP packets will cause an extended Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 15.1 versions prior to 15.1F6-S13, 15.1R7-S4; 15.1X49 versions prior to 15.1X49-D180 on SRX Series; 15.1X53 versions prior to 15.1X53-D238, 15.1X53-D496, 15.1X53-D592; 16.1 versions prior to 16.1R7-S4; 16.2 versions prior to 16.2R2-S9; 17.1 versions prior to 17.1R2-S11, 17.1R3; 17.2 versions prior to 17.2R1-S9; 17.2 version 17.2R2 and later prior to 17.2R3-S2; 17.3 versions prior to 17.3R3-S3; 17.4 versions prior to 17.4R2-S2, 17.4R3; 18.1 versions prior to 18.1R3-S2; 18.2 versions prior to 18.2R2-S6, 18.2R3; 18.2X75 versions prior to 18.2X75-D40; 18.3 versions prior to 18.3R2; 18.4 versions prior to 18.4R1-S2, 18.4R2. This issue does not affect releases of Junos OS prior to 15.1R1.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 123 | |
| Hardware | Juniper
| 21 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Server Side Include (SSI) Injection An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
- Cross Zone Scripting An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
- Cross Site Scripting through Log Files An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
- Command Line Execution through SQL Injection An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
Nessus
NASL family Junos Local Security Checks NASL id JUNIPER_JSA10980.NASL description According to its self-reported version number, the remote Juniper Junos device is affected by a vulnerability in the path computational element protocol daemon (pccd) process. An unauthenticated, remote attacker can exploit this issue, by sending malformed Path Computation Element Protocol (PCEP) packets to a Junos OS device serving as a Path Computation Client (PCC) in a PCEP environment in order to cause the pccd process to crash and generate a core file, thereby causing a Denial of Service (DoS) condition. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-03-18 modified 2020-01-20 plugin id 133088 published 2020-01-20 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133088 title Junos OS: pccd DoS (JSA10980) code #TRUSTED 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 # # (C) Tenable Network Security, Inc. # include('compat.inc'); if (description) { script_id(133088); script_version("1.2"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/01/20"); script_cve_id("CVE-2020-1601"); script_xref(name:"JSA", value:"JSA10980"); script_xref(name:"IAVA", value:"2020-A-0012"); script_name(english:"Junos OS: pccd DoS (JSA10980)"); script_set_attribute(attribute:"synopsis", value: "The remote device is missing a vendor-supplied security patch."); script_set_attribute(attribute:"description", value: "According to its self-reported version number, the remote Juniper Junos device is affected by a vulnerability in the path computational element protocol daemon (pccd) process. An unauthenticated, remote attacker can exploit this issue, by sending malformed Path Computation Element Protocol (PCEP) packets to a Junos OS device serving as a Path Computation Client (PCC) in a PCEP environment in order to cause the pccd process to crash and generate a core file, thereby causing a Denial of Service (DoS) condition. 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/InfoCenter/index?page=content&id=JSA10980"); script_set_attribute(attribute:"solution", value: "Apply the relevant Junos software release referenced in Juniper advisory JSA10980."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-1601"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/15"); script_set_attribute(attribute:"patch_publication_date", value:"2020/01/08"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/20"); 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_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Junos Local Security Checks"); script_dependencies("junos_version.nasl"); script_require_keys("Host/Juniper/JUNOS/Version"); exit(0); } include('audit.inc'); include('junos.inc'); include('junos_kb_cmd_func.inc'); ver = get_kb_item_or_exit('Host/Juniper/JUNOS/Version'); model = get_kb_item('Host/Juniper/model'); fixes = make_array(); if ( model =~ '^SRX') fixes['15.1X49'] = '15.1X49-D180'; if (ver =~ "^17.2R([0-1])([^0-9]|$)") fixes['17.2'] = '17.2R1-S9'; else fixes['17.2'] = '17.2R3-S2'; fixes['15.1F'] = '15.1F6-S13'; fixes['15.1R'] = '15.1R7-S4'; # 15.1X53 versions prior to 15.1X53-D238, 15.1X53-D496, 15.1X53-D592; fixes['15.1X53'] = '15.1X53-D238'; fixes['16.1'] = '16.1R7-S4'; fixes['16.2'] = '16.2R2-S9'; fixes['17.1'] = '17.1R2-S11'; fixes['17.3'] = '17.3R3-S3'; fixes['17.4'] = '17.4R2-S2'; fixes['18.1'] = '18.1R3-S2'; fixes['18.2X75'] = '18.2X75-D40'; fixes['18.2'] = '18.2R2-S6'; fixes['18.3'] = '18.3R2'; fixes['18.4'] = '18.4R1-S2'; fix = check_junos(ver:ver, fixes:fixes, exit_on_fail:TRUE); override = TRUE; buf = junos_command_kb_item(cmd:'show configuration | display set'); if (buf) { override = FALSE; pattern = "^set protocols pcep pce .* destination-ipv4-address"; if (!junos_check_config(buf:buf, pattern:pattern)) audit(AUDIT_HOST_NOT, 'using a vulnerable configuration'); } junos_report(ver:ver, fix:fix, override:override, severity:SECURITY_WARNING);NASL family Junos Local Security Checks NASL id JUNIPER_JSA10979.NASL description The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the JSA10979 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-05-06 modified 2020-02-25 plugin id 133965 published 2020-02-25 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133965 title Juniper JSA10979 code # # (C) Tenable Network Security, Inc. # include('compat.inc'); if (description) { script_id(133965); script_version("1.2"); script_cve_id( "CVE-2020-1600", "CVE-2020-1601", "CVE-2020-1602", "CVE-2020-1603", "CVE-2020-1604", "CVE-2020-1605", "CVE-2020-1607", "CVE-2020-1608", "CVE-2020-1609" ); script_xref(name:"IAVA", value:"2020-A-0012"); script_name(english:"Juniper JSA10979"); script_summary(english:"Checks the Junos version and build date."); 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 tested product installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the JSA10979 advisory. 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/KB16613"); script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/KB16765"); script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/KB16446"); script_set_attribute(attribute:"see_also", value:"https://kb.juniper.net/JSA10979"); script_set_attribute(attribute:"solution", value: "Apply the relevant Junos software release referenced in Juniper advisory JSA10979"); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1600"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/08"); script_set_attribute(attribute:"patch_publication_date", value:"2020/01/08"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/25"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/05"); 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 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("junos_version.nasl"); script_require_keys("Host/Juniper/JUNOS/Version", "Host/Juniper/model"); exit(0); } include('audit.inc'); include('junos.inc'); include('misc_func.inc'); ver = get_kb_item_or_exit('Host/Juniper/JUNOS/Version'); model = get_kb_item_or_exit('Host/Juniper/model'); fixes = make_array(); fixes["12.3X48"] = "12.3X48-D90"; fixes["15.1"] = "15.1R7-S6"; fixes["15.1X49"] = "15.1X49-D200"; fixes["15.1X53"] = "15.1X53-D238"; fixes["16.1"] = "16.1R7-S5"; fixes["16.2"] = "16.2R2-S11"; fixes["17.1"] = "17.1R3-S1"; fixes["17.2"] = "17.2R3-S2"; fixes["17.3"] = "17.3R3-S7"; fixes["17.4"] = "17.4R2-S4"; fixes["18.1"] = "18.1R3-S5"; fixes["18.2"] = "18.2R3"; fixes["18.2X75"] = "18.2X75-D50"; fixes["18.3"] = "18.3R2"; fixes["18.4"] = "18.4R1-S6"; fixes["19.1"] = "19.1R2"; fix = check_junos(ver:ver, fixes:fixes, exit_on_fail:TRUE); report = get_report(ver:ver, fix:fix); security_report_v4(severity:SECURITY_WARNING, port:0, extra:report);