SonicWALL SonicOS Buffer Overflow Vulnerability (CNVD-2021-28765)

SonicOS is SonicWALL's proprietary operating system and firmware for SonicWALL firewall appliances. A buffer overflow vulnerability exists in SonicWALL SonicOS, which can be exploited by an attacker to cause a denial of service in SSL-VPN and Proposed Helper Portal, which can lead to a firewall...

CVE-2020-5140

A vulnerability in SonicOS allows a remote unauthenticated attacker to cause Denial of Service DoS on the firewall SSLVPN service by sending a malicious HTTP request that leads to memory addresses leak. This vulnerability affected SonicOS Gen 5 version 5.9.1.7, 5.9.1.13, Gen 6 version 6.5.4.7,...

CVE-2020-5136

A buffer overflow vulnerability in SonicOS allows an authenticated attacker to cause Denial of Service DoS in the SSL-VPN and virtual assist portal, which leads to a firewall crash. This vulnerability affected SonicOS Gen 5 version 5.9.1.7, 5.9.1.13, Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3,...

Buffer overflow

A buffer overflow vulnerability in SonicOS allows an authenticated attacker to cause Denial of Service DoS in the SSL-VPN and virtual assist portal, which leads to a firewall crash. This vulnerability affected SonicOS Gen 5 version 5.9.1.7, 5.9.1.13, Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3,...

CVE-2020-5136

A buffer overflow vulnerability in SonicOS allows an authenticated attacker to cause Denial of Service DoS in the SSL-VPN and virtual assist portal, which leads to a firewall crash. This vulnerability affected SonicOS Gen 5 version 5.9.1.7, 5.9.1.13, Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3,...

CVE-2020-5136

CVE-2020-5136 is a buffer overflow in SonicOS that can be exploited by an authenticated attacker to cause a Denial of Service and a firewall crash affecting SSL-VPN and the virtual assist portal. Affected platforms include SonicOS Gen 5 (versions 5.9.1.7, 5.9.1.13), Gen 6 (versions 6.5.4.7, 6.5.1...

USN-4565-1: OpenConnect vulnerability

It was discovered that OpenConnect has a buffer overflow when a malicious server uses HTTP chunked encoding with crafted chunk sizes. An attacker could use it to provoke a denial of service crash...

Fortinet FortiOS < 6.0.10 / 6.2.x < 6.2.4 / 6.4.x < 6.4.1 Improper Authentication (FG-IR-19-283)

The remote host is running a version of FortiOS prior to 6.0.10, 6.2.x prior to 6.2.4, or 6.4.x prior to 6.4.1. It is, therefore, affected by an improper authentication vulnerability due to an issue with the 'username-case-sensitivity' CLI attribute for the SSL VPN. An unauthenticated, remote...

CVE-2020-5132

SonicWall SSL-VPN products and SonicWall firewall SSL-VPN feature misconfiguration leads to possible DNS flaw known as domain name collision vulnerability. When the users publicly display their organization’s internal domain names in the SSL-VPN authentication page, an attacker with knowledge of...

CVE-2020-5132

SonicWall SSL-VPN products and SonicWall firewall SSL-VPN feature misconfiguration leads to possible DNS flaw known as domain name collision vulnerability. When the users publicly display their organization’s internal domain names in the SSL-VPN authentication page, an attacker with knowledge of...

Code injection

SonicWall SSL-VPN products and SonicWall firewall SSL-VPN feature misconfiguration leads to possible DNS flaw known as domain name collision vulnerability. When the users publicly display their organization’s internal domain names in the SSL-VPN authentication page, an attacker with knowledge of...

CVE-2020-5132

CVE-2020-5132 affects SonicWall SSL-VPN products and SonicWall firewall SSL-VPN feature. The issue is a misconfiguration that enables a DNS domain-name collision vulnerability: when internal domain names are exposed on the SSL-VPN authentication page, an attacker aware of internal domain names co...

CVE-2020-5132

SonicWall SSL-VPN products and SonicWall firewall SSL-VPN feature misconfiguration leads to possible DNS flaw known as domain name collision vulnerability. When the users publicly display their organization’s internal domain names in the SSL-VPN authentication page, an attacker with knowledge of...

FortiGate SSL VPN "Breaching the Fort"

Security researchers at SAM Seamless Network published a blog post on September 24, 2020 stating that 200,000 businesses were exposed to Man-in-the-Middle MITM attacks against FortiGate SSL VPNs due to the VPN client’s failure to properly verify the server’s certificate out of the box. Instead,...

CVE-2020-8245

Improper Input Validation on Citrix ADC and Citrix Gateway 13.0 before 13.0-64.35, Citrix ADC and NetScaler Gateway 12.1 before 12.1-58.15, Citrix ADC 12.1-FIPS before 12.1-55.187, Citrix ADC and NetScaler Gateway 12.0, Citrix ADC and NetScaler Gateway 11.1 before 11.1-65.12, Citrix SD-WAN WANOP...

Input validation

Improper Input Validation on Citrix ADC and Citrix Gateway 13.0 before 13.0-64.35, Citrix ADC and NetScaler Gateway 12.1 before 12.1-58.15, Citrix ADC 12.1-FIPS before 12.1-55.187, Citrix ADC and NetScaler Gateway 12.0, Citrix ADC and NetScaler Gateway 11.1 before 11.1-65.12, Citrix SD-WAN WANOP...

CVE-2020-8245

Improper Input Validation on Citrix ADC and Citrix Gateway 13.0 before 13.0-64.35, Citrix ADC and NetScaler Gateway 12.1 before 12.1-58.15, Citrix ADC 12.1-FIPS before 12.1-55.187, Citrix ADC and NetScaler Gateway 12.0, Citrix ADC and NetScaler Gateway 11.1 before 11.1-65.12, Citrix SD-WAN WANOP...

CVE-2020-8245

Citrix advisory CTX281474 details CVE-2020-8245 affecting Citrix ADC, Citrix Gateway, and related SD-WAN WANOP appliances. Root cause: HTML Injection due to improper input validation in the SSL VPN web portal. Impact: HTML content injection by an authenticated victim who must open an attacker-con...

Vulnerability fixed in FortiOS

Fortinet has fixed a vulnerability in FortiOS. The vulnerability allows a malicious party to perform a Cross-Site Scripting XSS attack. The vulnerability arises from incorrect input validation when generating a Web page in the SSL VPN portal. Fortinet has released updates to fix the vulnerability...

This One Time on a Pen Test: Outwitting the Vexing VPN

Each year, Rapid7 penetration testers complete hundreds of internally and externally based penetration testing service engagements. This post is part of an ongoing series featuring testimonials of what goes on beneath the hoodie. For more insights, check out our 2020 Under the Hoodie report. Just...