Juniper Junos Commit Script access control

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Juniper Junos and classified as critical. This affects an unknown function of the component Commit Script Handler. Executing a manipulation can lead to access control. The identification of this vulnerability is CVE-2018-0008. The physical device can be targeted for the attack. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Juniper Junos (Router Operating System) (the affected version is unknown). It has been declared as problematic. This vulnerability affects an unknown code of the component Commit Script Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An unauthenticated root login may allow upon reboot when a commit script is used. A commit script allows a device administrator to execute certain instructions during commit, which is configured under the [system scripts commit] stanza. Certain commit scripts that work without a problem during normal commit may cause unexpected behavior upon reboot which can leave the system in a state where root CLI login is allowed without a password due to the system reverting to a "safe mode" authentication state. Lastly, only logging in physically to the console port as root, with no password, will work. Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D71 on SRX; 12.3X48 versions prior to 12.3X48-D55 on SRX; 14.1 versions prior to 14.1R9; 14.1X53 versions prior to 14.1X53-D40 on QFX, EX; 14.2 versions prior to 14.2R7-S9, 14.2R8; 15.1 versions prior to 15.1F5-S7, 15.1F6-S8, 15.1R5-S6, 15.1R6; 15.1X49 versions prior to 15.1X49-D110 on SRX; 15.1X53 versions prior to 15.1X53-D232 on QFX5200/5110; 15.1X53 versions prior to 15.1X53-D49, 15.1X53-D470 on NFX; 15.1X53 versions prior to 15.1X53-D65 on QFX10K; 16.1 versions prior to 16.1R2. No other Juniper Networks products or platforms are affected by this issue.

The bug was discovered 01/10/2018. The weakness was shared 01/10/2018 (Website). The advisory is shared for download at kb.juniper.net. This vulnerability was named CVE-2018-0008 since 11/16/2017. The exploitation appears to be difficult. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 106392 (Juniper Junos Commit Script Handling Local Console Port Access Weakness Vulnerability (JSA10835)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Junos Local Security Checks and running in the context c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43624 (Juniper Junos OS commit script may allow unauthenticated root login Vulnerability(JSA10835)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106392). The entries VDB-111723, VDB-111722 and VDB-111720 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 3.6
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.2
NVD Vector: 🔍

CNA Base Score: 6.2
CNA Vector (Juniper Networks, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 106392
Nessus Name: Juniper Junos Commit Script Handling Local Console Port Access Weakness Vulnerability (JSA10835)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

11/16/2017 🔍
01/10/2018 +55 days 🔍
01/10/2018 +0 days 🔍
01/10/2018 +0 days 🔍
01/10/2018 +0 days 🔍
01/11/2018 +1 days 🔍
01/26/2018 +15 days 🔍
01/20/2023 +1820 days 🔍

Sourcesinfo

Vendor: juniper.net

Advisory: kb.juniper.net
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-0008 (🔍)
GCVE (CVE): GCVE-0-2018-0008
GCVE (VulDB): GCVE-100-111724
SecurityTracker: 1040186

See also: 🔍

Entryinfo

Created: 01/11/2018 16:31
Updated: 01/20/2023 14:52
Changes: 01/11/2018 16:31 (66), 12/29/2019 08:27 (3), 01/29/2021 19:22 (2), 01/29/2021 19:26 (1), 01/20/2023 14:52 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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