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Vulnerability Details : CVE-2013-6955

webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before 4.3-3810 Update 1 allows remote attackers to append data to arbitrary files, and consequently execute arbitrary code, via a pathname in the SLICEUPLOAD X-TMP-FILE HTTP header.
Publish Date : 2014-01-09 Last Update Date : 2014-01-10
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- CVSS Scores & Vulnerability Types

CVSS Score
10.0
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute Code
CWE ID 264

- Products Affected By CVE-2013-6955

# Product Type Vendor Product Version Update Edition Language
1 Application Synology Diskstation Manager 4.0 Version Details Vulnerabilities
2 Application Synology Diskstation Manager 4.2 Version Details Vulnerabilities
3 Application Synology Diskstation Manager 4.3 Version Details Vulnerabilities
4 Application Synology Diskstation Manager 4.3-3810 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Synology Diskstation Manager 4

- References For CVE-2013-6955

http://www.kb.cert.org/vuls/id/615910
CERT-VN VU#615910

- Metasploit Modules Related To CVE-2013-6955

Synology DiskStation Manager SLICEUPLOAD Remote Command Execution
This module exploits a vulnerability found in Synology DiskStation Manager (DSM) versions 4.x, which allows the execution of arbitrary commands under root privileges. The vulnerability is located in /webman/imageSelector.cgi, which allows to append arbitrary data to a given file using a so called SLICEUPLOAD functionality, which can be triggered by an unauthenticated user with a specially crafted HTTP request. This is exploited by this module to append the given commands to /redirect.cgi, which is a regular shell script file, and can be invoked with another HTTP request. Synology reported that the vulnerability has been fixed with versions 4.0-2259, 4.2-3243, and 4.3-3810 Update 1, respectively; the 4.1 branch remains vulnerable.
Module type : exploit Rank : excellent Platforms : Unix


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