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CVE-2018-1042 : Detail

CVE-2018-1042

6.5
/
MEDIUM
Server-Side Request Forgery - SSRF
A10-Server-Side Request Forgery (SSRF)
0.69%V3
Network
2018-01-22 07:00 +00:00
2019-07-27 16:06 +00:00
CVE.org
NVD

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Descriptions

Moodle 3.x has Server Side Request Forgery in the filepicker.

Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-918 Server-Side Request Forgery (SSRF)
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Metrics

Metric Score Severity CVSS Vector Source
V3.0 6.5 MEDIUM CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Base: Exploitabilty Metrics

The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.

Attack Vector

This metric reflects the context by which vulnerability exploitation is possible.

Network

A vulnerability exploitable with network access means the vulnerable component is bound to the network stack and the attacker's path is through OSI layer 3 (the network layer). Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable one or more network hops away (e.g. across layer 3 boundaries from routers).

Attack Complexity

This metric describes the conditions beyond the attacker's control that must exist in order to exploit the vulnerability.

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.

Privileges Required

This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.

Low

The attacker is authorized with (i.e. requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.

User Interaction

This metric captures the requirement for a user, other than the attacker, to participate in the successful compromise of the vulnerable component.

None

The vulnerable system can be exploited without interaction from any user.

Base: Scope Metrics

An important property captured by CVSS v3.0 is the ability for a vulnerability in one software component to impact resources beyond its means, or privileges.

Scope

Formally, Scope refers to the collection of privileges defined by a computing authority (e.g. an application, an operating system, or a sandbox environment) when granting access to computing resources (e.g. files, CPU, memory, etc). These privileges are assigned based on some method of identification and authorization. In some cases, the authorization may be simple or loosely controlled based upon predefined rules or standards. For example, in the case of Ethernet traffic sent to a network switch, the switch accepts traffic that arrives on its ports and is an authority that controls the traffic flow to other switch ports.

Unchanged

An exploited vulnerability can only affect resources managed by the same authority. In this case the vulnerable component and the impacted component are the same.

Base: Impact Metrics

The Impact metrics refer to the properties of the impacted component.

Confidentiality Impact

This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.

High

There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.

Integrity Impact

This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.

None

There is no loss of integrity within the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

None

There is no impact to availability within the impacted component.

Temporal Metrics

The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence that one has in the description of a vulnerability.

Environmental Metrics

 [email protected]
V2 4 AV:N/AC:L/Au:S/C:P/I:N/A:N [email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 47177

Publication date : 2019-07-25 22:00 +00:00
Author : Fabian Mosch_ Nick Theisinger
EDB Verified : No

# Exploit Title: Server Side Request Forgery in Moodle Filepicker # Google Dork: / # Date: 2019-07-25 # Exploit Author: Fabian Mosch & Nick Theisinger (r-tec IT Security GmbH) # Vendor Homepage: https://moodle.org/ # Software Link: https://github.com/moodle/moodle # Version: Moodle Versions 3.4, 3.3, 3.3.3, 3.2 to 3.2.6, 3.1 to 3.1.9 and 3.5.2 # Tested on: Moodle Version 3.5.2 # CVE : CVE-2018-1042 We found a SSRF vulnerability for Moodle version 3.5.2. An authenticated attacker can scan the internal network and exploit internal web services with blind injections. Probably we are dealing with CVE-2018-1042 mentioned here: https://moodle.org/mod/forum/discuss.php?d=364381 In version 3.5.2 we were not able to view all internal web server content, only pictures (PNG, GIF, SVN and so on) were displayed as a JSON-list. But it is possible to do internal port scans via http:// and https:// protocols. Open ports with no response for HTTP requests resulted in a timeout, SSL services like OpenSSH gave an SSL Error. For web applications the HTTP headers can be found in the response (403 forbidden, 404 not Found and so on). Found web applications can be attacked via HTTP GET requests. The vulnerable script is "repository_ajax.php" and the parameter is "file". Example exploitation request: POST /repository/repository_ajax.php?action=signin HTTP/1.1 Host: VulnerableMoodleHost User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0 Accept: */* Accept-Language: de,en-US;q=0.7,en;q=0.3 Accept-Encoding: gzip, deflate Referer: https://VulnerableMoodleHost/user/files.php X-Requested-With: XMLHttpRequest Content-Type: application/x-www-form-urlencoded; charset=UTF-8 Content-Length: 165 Connection: close Cookie: MoodleSession=xxxxx; file=InternalURL?parameter=XXEInjection&repo_id=5&p=&page=&env=filemanager&sesskey=xxxxxxxxxx

Products Mentioned

Configuraton 0

Moodle>>Moodle >> Version To (including) 3.1.9

Moodle>>Moodle >> Version 3.2.0

Moodle>>Moodle >> Version 3.2.1

Moodle>>Moodle >> Version 3.2.2

Moodle>>Moodle >> Version 3.2.3

Moodle>>Moodle >> Version 3.2.4

Moodle>>Moodle >> Version 3.2.5

Moodle>>Moodle >> Version 3.2.6

Moodle>>Moodle >> Version 3.3.0

Moodle>>Moodle >> Version 3.3.1

Moodle>>Moodle >> Version 3.3.2

Moodle>>Moodle >> Version 3.3.3

Moodle>>Moodle >> Version 3.4.0

References

http://www.securityfocus.com/bid/102752
Tags : vdb-entry, x_refsource_BID

More information
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