CVE-2017-8336

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Summary

CVECVE-2017-8336
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-06-18 19:15:00 UTC
Updated2019-06-21 13:16:00 UTC
DescriptionAn issue was discovered on Securifi Almond, Almond+, and Almond 2015 devices with firmware AL-R096. The device provides a user with the capability of adding new routes to the device. It seems that the POST parameters passed in this request to set up routes on the device can be set in such a way that would result in overflowing the stack set up and allow an attacker to control the $ra register stored on the stack. 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 recieves 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 request. The POST parameter "gateway" allows to overflow the stack and control the $ra register after 1546 characters. The value from this post parameter is then copied on the stack at address 0x00421348 as shown below. This allows an attacker to provide the payload of his/her choice and finally take control of the device.

Risk And Classification

Problem Types: CWE-119

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Securifi Almond - All All All
Hardware Securifi Almond - All All All
Hardware Securifi Almond - All All All
Operating System Securifi Almond Firmware al-r096 All All All
Hardware Securifi Almond - All All All
Hardware Securifi Almond - All All All
Operating System Securifi Almond Firmware al-r096 All All All
Operating System Securifi Almond Firmware al-r096 All All All
Hardware Securifi Almond 2015 - All All All
Hardware Securifi Almond 2015 - All All All
Operating System Securifi Almond 2015 Firmware al-r096 All All All
Operating System Securifi Almond 2015 Firmware al-r096 All All All
Operating System Securifi Almond Firmware al-r096 All All All
Operating System Securifi Almond Firmware al-r096 All All All

References

ReferenceSourceLinkTags
IoT_vulnerabilities/Securifi_Almond_plus_sec_issues.pdf at master · ethanhunnt/IoT_vulnerabilities · GitHub MISC github.com Exploit, Third Party Advisory
Bugtraq: Newly releases IoT security issues BUGTRAQ seclists.org Mailing List, Third Party Advisory
Securifi Almond 2015 Buffer Overflow / Command Injection / XSS / CSRF ≈ Packet Storm MISC packetstormsecurity.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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