Vulnerabilities > CVE-2019-0063 - Improper Input Validation vulnerability in Juniper Junos
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
PARTIAL Summary
When an MX Series Broadband Remote Access Server (BRAS) is configured as a Broadband Network Gateway (BNG) with DHCPv6 enabled, jdhcpd might crash when receiving a specific crafted DHCP response message on a subscriber interface. The daemon automatically restarts without intervention, but continuous receipt of specific crafted DHCP messages will repeatedly crash jdhcpd, leading to an extended Denial of Service (DoS) condition. This issue only affects systems configured with DHCPv6 enabled. DHCPv4 is unaffected by this issue. This issue affects Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S5 on MX Series; 16.1 versions prior to 16.1R7-S5 on MX Series; 16.2 versions prior to 16.2R2-S10 on MX Series; 17.1 versions prior to 17.1R3-S1 on MX Series; 17.2 versions prior to 17.2R3-S2 on MX Series; 17.3 versions prior to 17.3R3-S6 on MX Series; 17.4 versions prior to 17.4R2-S5, 17.4R3 on MX Series; 18.1 versions prior to 18.1R3-S6 on MX Series; 18.2 versions prior to 18.2R2-S4, 18.2R3 on MX Series; 18.2X75 versions prior to 18.2X75-D50 on MX Series; 18.3 versions prior to 18.3R1-S5, 18.3R3 on MX Series; 18.4 versions prior to 18.4R2 on MX Series; 19.1 versions prior to 19.1R1-S2, 19.1R2 on MX Series.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 119 | |
| Hardware | 17 |
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_JSA10970.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 JSA10970 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 133303 published 2020-01-29 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133303 title Juniper JSA10970 code # # (C) Tenable Network Security, Inc. # include('compat.inc'); if (description) { script_id(133303); script_version("1.1"); script_cvs_date("Date: 2020/01/29"); script_cve_id( "CVE-2019-0047", "CVE-2019-0050", "CVE-2019-0054", "CVE-2019-0055", "CVE-2019-0057", "CVE-2019-0058", "CVE-2019-0059", "CVE-2019-0060", "CVE-2019-0062", "CVE-2019-0063", "CVE-2019-0064", "CVE-2019-0066", "CVE-2019-0067", "CVE-2019-0068", "CVE-2019-0073", "CVE-2019-0075" ); script_xref(name:"IAVA", value:"2019-A-0388"); script_name(english:"Juniper JSA10970"); 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 JSA10970 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/JSA10970"); script_set_attribute(attribute:"solution", value: "Apply the relevant Junos software release referenced in Juniper advisory JSA10970"); 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:N/UI:R/S:U/C:H/I:H/A:H"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-0047"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/28"); script_set_attribute(attribute:"patch_publication_date", value:"2020/01/28"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/29"); 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['12.1X46'] = '12.1X46-D86'; fixes['12.3'] = '12.3R12-S13'; fixes['12.3X48'] = '12.3X48-D80'; fixes['14.1X53'] = '14.1X53-D51'; if (ver =~ "^15\.1F") fixes['15.1F'] = '15.1F6-S13'; else fixes['15.1'] = '15.1R7-S4'; fixes['15.1X49'] = '15.1X49-D171'; fixes['15.1X53'] = '15.1X53-D69'; fixes['16.1'] = '16.1R7-S5'; fixes['16.2'] = '16.2R2-S9'; fixes['17.1'] = '17.1R3'; if (ver =~ "^17\.2R1") fixes['17.2'] = '17.2R1-S8'; else if (ver =~ "^17\.2R2") fixes['17.2'] = '17.2R2-S7'; else if (ver =~ "^17\.2R3") fixes['17.2'] = '17.2R3-S1'; fixes['17.3'] = '17.3R3-S6'; if (ver =~ "^17\.4R1") fixes['17.4'] = '17.4R1-S7'; else if (ver =~ "^17\.4R2") fixes['17.4'] = '17.4R2-S4'; else fixes['17.4'] = '17.4R3'; fixes['18.1'] = '18.1R3-S5'; if (ver =~ "^18\.2R1") fixes['18.2'] = '18.2R1-S5'; else if (ver =~ "^18\.2R2") fixes['18.2'] = '18.2R2-S3'; else fixes['18.2'] = '18.2R3'; if (ver =~ "^18\.3R1") fixes['18.3'] = '18.3R1-S3'; else if (ver =~ "^18\.3R2") fixes['18.3'] = '18.3R2'; else if (ver =~ "^18\.3R3") fixes['18.3'] = '18.3R3'; if (ver =~ "^18\.4R1") fixes['18.4'] = '18.4R1-S2'; else fixes['18.4'] = '18.4R2'; 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);NASL family Junos Local Security Checks NASL id JUNIPER_JSA10962.NASL description The version of Junos OS installed on the remote host is prior to 15.1R7-S5, 16.1R7-S5, 16.2R2-S10, 17.1R3-S1, 17.2R3-S2, 17.3R3-S6, 17.4R2-S5, 18.1R3-S6, 18.2R2-S4, 18.2X75-D50, 18.3R1-S5, 18.4R2, or 19.1R1-S2. It is, therefore, affected by a vulnerability as referenced in the JSA10962 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 130053 published 2019-10-18 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130053 title Juniper JSA10962 code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(130053); script_version("1.1"); script_cvs_date("Date: 2019/10/18 11:42:09"); script_cve_id("CVE-2019-0063"); script_xref(name:"JSA", value:"JSA10962"); script_xref(name:"IAVA", value:"2019-A-0388"); script_name(english:"Juniper JSA10962"); 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 15.1R7-S5, 16.1R7-S5, 16.2R2-S10, 17.1R3-S1, 17.2R3-S2, 17.3R3-S6, 17.4R2-S5, 18.1R3-S6, 18.2R2-S4, 18.2X75-D50, 18.3R1-S5, 18.4R2, or 19.1R1-S2. It is, therefore, affected by a vulnerability as referenced in the JSA10962 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/JSA10962"); script_set_attribute(attribute:"solution", value: "Apply the relevant Junos software release referenced in Juniper advisory JSA10962"); script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-8748"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/09"); script_set_attribute(attribute:"patch_publication_date", value:"2019/10/09"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/10/18"); 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) 2019 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(); if (model =~ "^MX") { fixes["15.1"] = "15.1R7-S5"; fixes["16.1"] = "16.1R7-S5"; fixes["16.2"] = "16.2R2-S10"; fixes["17.1"] = "17.1R3-S1"; fixes["17.2"] = "17.2R3-S2"; fixes["17.3"] = "17.3R3-S6"; fixes["17.4"] = "17.4R2-S5"; fixes["18.1"] = "18.1R3-S6"; fixes["18.2"] = "18.2R2-S4"; fixes["18.2X75"] = "18.2X75-D50"; fixes["18.3"] = "18.3R1-S5"; fixes["18.4"] = "18.4R2"; fixes["19.1"] = "19.1R1-S2"; } 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);