Vulnerabilities > CVE-2019-0054 - Improper Certificate Validation vulnerability in Juniper Junos 15.1X49
Attack vector
NETWORK Attack complexity
HIGH Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
NONE Summary
An Improper Certificate Validation weakness in the SRX Series Application Identification (app-id) signature update client of Juniper Networks Junos OS allows an attacker to perform Man-in-the-Middle (MitM) attacks which may compromise the integrity and confidentiality of the device. This issue affects: Juniper Networks Junos OS 15.1X49 versions prior to 15.1X49-D120 on SRX Series devices. No other versions of Junos OS are affected.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 17 | |
| Hardware | Juniper
| 24 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Creating a Rogue Certificate Authority Certificate An attacker exploits a weakness in the MD5 hash algorithm (weak collision resistance) to generate a certificate signing request (CSR) that contains collision blocks in the "to be signed" part. The attacker specially crafts two different, but valid X.509 certificates that when hashed with the MD5 algorithm would yield the same value. The attacker then sends the CSR for one of the certificates to the Certification Authority which uses the MD5 hashing algorithm. That request is completely valid and the Certificate Authority issues an X.509 certificate to the attacker which is signed with its private key. An attacker then takes that signed blob and inserts it into another X.509 certificate that the attacker generated. Due to the MD5 collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the attackers' second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority. To make the attack more interesting, the second certificate could be not just a regular certificate, but rather itself a signing certificate. Thus the attacker is able to start their own Certification Authority that is anchored in its root of trust in the legitimate Certification Authority that has signed the attackers' first X.509 certificate. If the original Certificate Authority was accepted by default by browsers, so will now the Certificate Authority set up by the attacker and of course any certificates that it signs. So the attacker is now able to generate any SSL certificates to impersonate any web server, and the user's browser will not issue any warning to the victim. This can be used to compromise HTTPS communications and other types of systems where PKI and X.509 certificates may be used (e.g., VPN, IPSec) .
Nessus
NASL family Junos Local Security Checks NASL id JUNIPER_JSA10952.NASL description According to its self-reported version number, the remote Juniper Junos device is affected by a weakness in the Application Identification (app-id) signature update client. This allows an unauthenticated, remote attacker to perform a Man-in-the-Middle (MitM) attack which can compromise the integrity and confidentiality of the device. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-03-18 modified 2019-11-04 plugin id 130469 published 2019-11-04 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130469 title Junos OS: app-id Signature Update MitM (JSA10952) code #TRUSTED 3b1b2d1c9f1d0d2d10f089cf9e3e6bb5ab1431081c5cba83236a2fad3ebecf6a03b936ee279c7fc2c3957ff584f9b344c0d917118fb1da10772a738e036fe0579daf26f8aa5518b6018869130d065e8bebd0d8fe28a36c1ff974435f380df7b468603ca2dfcf96692decac0889e21960bd6a306e3a4f7dc3a12b4b429a262103edb9e97b77b56f4b67053063f73d34180c63ddff1b61f4a47d4830dbc86e24143c7252b6a067a07db8ae1579e86dd80482e4ee3f6821d188b5f9ee8ae5efb8119def18c543d92ea1fc01443f2877a186ac996fb04020455976f75042a07b26f75ff58402d4fa0d752c0b70ea750ea59b1b4b28e25d0420e5654376f6131934c7cbad0550d7aae773754bb165bd091e5a2f546237868d9ed0d0add4ec0bff1b516ca216d8d2d2cbb3dcfa9998daa17a6373156986aff24a88b350fa77925b4890a072b07c10581fe346fdbc0e0fff05ac4757b4e9e83f4516120381f97741ebd309b78eb9e3a0d97f97cd371ff7a9f05fb1abed134758ff6a4e40ac52c92f27514658c93668e555f81d52e8fd23f2c96c8677d683042bca5505a606882f3cba4fb646959fbca3a865dd861d9603466b8d2815e98a8ee49e6a843550f36b7946b5170a452fa8aa5bf61b5d4faa08bf4b7effa594314d2876769da6fbe6a5738dc16ec9c4311ed5acfc54608d13629e4534a41adee0bc5503e903cc3da3dd80a634 # # (C) Tenable Network Security, Inc. # include('compat.inc'); if (description) { script_id(130469); script_version("1.2"); script_set_attribute(attribute:"plugin_modification_date", value:"2019/11/04"); script_cve_id("CVE-2019-0054"); script_xref(name:"JSA", value:"JSA10952"); script_xref(name:"IAVA", value:"2019-A-0388"); script_name(english:"Junos OS: app-id Signature Update MitM (JSA10952)"); 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 weakness in the Application Identification (app-id) signature update client. This allows an unauthenticated, remote attacker to perform a Man-in-the-Middle (MitM) attack which can compromise the integrity and confidentiality of the device. 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=JSA10952"); script_set_attribute(attribute:"solution", value: "Apply the relevant Junos software release referenced in Juniper advisory JSA10952."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-0054"); 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:"2019/11/04"); 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) 2019 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", "Host/Juniper/model"); exit(0); } include('audit.inc'); include('junos.inc'); include('junos_kb_cmd_func.inc'); include('misc_func.inc'); ver = get_kb_item_or_exit('Host/Juniper/JUNOS/Version'); model = get_kb_item_or_exit('Host/Juniper/model'); # SRX Series if ( 'SRX' >!< model) audit(AUDIT_INST_VER_NOT_VULN, 'Junos', ver); fixes = make_array(); fixes['15.1X49'] = '15.1X49-D120'; fix = check_junos(ver:ver, fixes:fixes, exit_on_fail:TRUE); # If application-identification is disabled, audit out. # https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-application-identification-overview.html override = TRUE; buf = junos_command_kb_item(cmd:'show configuration | display set'); if (buf) { override = FALSE; pattern = "^set services application-identification no-application-identification"; if (junos_check_config(buf:buf, pattern:pattern)) audit(AUDIT_HOST_NOT, 'vulnerable as application identification is disabled.'); } junos_report(ver:ver, fix:fix, override:override, severity:SECURITY_WARNING);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);