SB2019091710 - Multiple vulnerabilities in CUJO Smart Firewall

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Main Vulnerability Database SB2019091710

SB2019091710 - Multiple vulnerabilities in CUJO Smart Firewall

Published: September 17, 2019

Security Bulletin ID SB2019091710
Severity
High
Patch available
NO
Number of vulnerabilities 6
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 67% Medium 17% Low 17%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 secuirty vulnerabilities.


1) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2018-4030)

The vulnerability allows a remote attacker to conduct an HTTP request smuggling attack on the target system.

The vulnerability exists due to the way the "safe browsing" function parses HTTP requests. A remote attacker can send a specially crafted HTTP request to the application, which incorrectly extracts the "Host" header from captured HTTP, allowing visit any malicious websites and bypass the firewall.

2) Integer underflow (CVE-ID: CVE-2018-4011)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists because of integer underflow in the "mdnscap" binary when parsing SRV records in an mDNS packet due to the "RDLENGTH" value is handled incorrectly. A remote attacker can send a specially crafted mDNS message to the affected application, trigger integer underflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


3) Double Free (CVE-ID: CVE-2018-3985)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the "mdnscap" binary when parsing mDNS packets. A remote attacker can send a specially crafted mDNS message, trigger double free error and execute arbitrary code in the context of the "mdnscap" process.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


4) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2018-3969)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insufficient permission restrictions in the verified boot protection. A local user who is able to write into "/config/dhcpd.conf" can add arbitrary shell commands into the "dhcpd.conf" file and execute arbitrary commands on the target system.


5) Command Injection (CVE-ID: CVE-2018-3963)

The vulnerability allows a local user to execute arbitrary commands on the target system.

The vulnerability exists due to insufficient validation of user-supplied input in the DHCP daemon configuration. A local authenticated user can send a DHCP request message, set up the corresponding static DHCP entry and execute arbitrary system commands on the target system.

6) Heap-based buffer overflow (CVE-ID: CVE-2018-4003)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the mdnscap binary. A remote attacker can send a specially crafted mDNS message, trigger heap-based buffer overflow and execute arbitrary code on the target system.



Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References