#VU3080 Heap-based buffer overflow in QNAP QTS
Published: January 2, 2017 / Updated: July 6, 2020
Vulnerability identifier: #VU3080
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
CVE-ID: N/A
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
QNAP QTS
QNAP QTS
Software vendor:
QNAP Systems, Inc.
QNAP Systems, Inc.
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within QNAP web management interface when processing overly long string passed via "p" HTTP GET parameter to /cgi-bin/cgi.cgi binary. A remote attacker can send a specially crafted HTTP GET request, containing name of valid user account and overly long password, cause heap-based buffer overflow and execute arbitrary code on vulnerable system.
Successful exploitation of the vulnerability results in compromise of vulnerable system.
Exploitation example:
echo -en "GET /cgi-bin/cgi.cgi?u=admin&p=`for((i=0;i<263;i++));do echo -en "A";done` HTTP/1.0\nHost: QNAP\n\n" | ncat --ssl 192.168.5.7 443
Remediation
Install update from vendor's website.