Vulnerabilities > CVE-2016-4924 - Permission Issues vulnerability in Juniper Junos 14.1/15.1
Attack vector
LOCAL Attack complexity
LOW Privileges required
SINGLE Confidentiality impact
PARTIAL Integrity impact
NONE Availability impact
NONE Summary
An incorrect permissions vulnerability in Juniper Networks Junos OS on vMX may allow local unprivileged users on a host system read access to vMX or vPFE images and obtain sensitive information contained in them such as private cryptographic keys. This issue was found during internal product security testing. Juniper SIRT is not aware of any malicious exploitation of this vulnerability. No other Juniper Networks products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS 15.1 prior to 15.1F5; 14.1 prior to 14.1R8
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 16 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Accessing, Modifying or Executing Executable Files An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
- Leverage Executable Code in Non-Executable Files An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
Nessus
| NASL family | Junos Local Security Checks |
| NASL id | JUNIPER_JSA10766.NASL |
| description | According to its self-reported version number and architecture, the remote Juniper Junos vMX (Virtual MX Series) router is 14.1 prior to 14.1R8 or 15.1 prior to 15.1F5. It is, therefore, affected by a local information disclosure vulnerability due to the use of incorrect permissions. A local attacker can exploit this to disclose sensitive information in vMX or vPFE images, including private cryptographic keys. |
| last seen | 2020-03-18 |
| modified | 2016-11-04 |
| plugin id | 94579 |
| published | 2016-11-04 |
| reporter | This script is Copyright (C) 2016-2018 Tenable Network Security, Inc. |
| source | https://www.tenable.com/plugins/nessus/94579 |
| title | Juniper Junos vMX 14.1 < 14.1R8 / 15.1 < 15.1F5 Local Information Disclosure (JSA10766) |
| code | |