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Vulnerability Details : CVE-2017-8329

An issue was discovered on Securifi Almond, Almond+, and Almond 2015 devices with firmware AL-R096. The device provides a user with the capability of setting a name for the wireless network. These values are stored by the device in NVRAM (Non-volatile RAM). It seems that the POST parameters passed in this request to set up names on the device do not have a string length check on them. This allows an attacker to send a large payload in the "mssid_1" POST parameter. The device also allows a user to view the name of the Wifi Network set by the user. While processing this request, the device calls a function at address 0x00412CE4 (routerSummary) in the binary "webServer" located in Almond folder, which retrieves the value set earlier by "mssid_1" parameter as SSID2 and this value then results in overflowing the stack set up for this function and allows an attacker to control $ra register value on the stack which allows an attacker to control the device by executing a payload of an attacker's choice. If the firmware version AL-R096 is dissected using binwalk tool, we obtain a cpio-root archive which contains the filesystem set up on the device that contains all the binaries. The binary "goahead" is the one that has the vulnerable function that receives the values sent by the POST request. If we open this binary in IDA-pro we will notice that this follows a MIPS little endian format. The function sub_00420F38 in IDA pro is identified to be receiving the values sent in the POST parameter "mssid_1" at address 0x0042BA00 and then sets in the NVRAM at address 0x0042C314. The value is later retrieved in the function at address 0x00412EAC and this results in overflowing the buffer as the function copies the value directly on the stack.
Publish Date : 2019-06-18 Last Update Date : 2019-06-20
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- CVSS Scores & Vulnerability Types

CVSS Score
4.6
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity High (Specialized access conditions exist. It is hard to exploit and several special conditions must be satisfied to exploit)
Authentication Single system (The vulnerability requires an attacker to be logged into the system (such as at a command line or via a desktop session or web interface).)
Gained Access None
Vulnerability Type(s) Overflow
CWE ID 119

- Products Affected By CVE-2017-8329

# Product Type Vendor Product Version Update Edition Language
1 OS Securifi Almond 2015 Firmware Al-r096 Version Details Vulnerabilities
2 OS Securifi Almond Firmware Al-r096 Version Details Vulnerabilities
3 OS Securifi Almond+firmware Al-r096 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Securifi Almond 2015 Firmware 1
Securifi Almond Firmware 1
Securifi Almond+firmware 1

- References For CVE-2017-8329

http://packetstormsecurity.com/files/153227/Securifi-Almond-2015-Buffer-Overflow-Command-Injection-XSS-CSRF.html
https://seclists.org/bugtraq/2019/Jun/8
BUGTRAQ 20190609 Newly releases IoT security issues
https://github.com/ethanhunnt/IoT_vulnerabilities/blob/master/Securifi_Almond_plus_sec_issues.pdf

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)
Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)
Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)

- Metasploit Modules Related To CVE-2017-8329

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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