CVE-2021-27853 L2 network filtering can be bypassed using stacked VLAN0 and LLC/SNAP headers

Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinations of VLAN 0 headers and LLC/SNAP headers...

Vulnerabilities in Layer 2 Network Security Controls Affecting Cisco Products: September 2022

On September 27, 2022, the following vulnerabilities affecting Cisco products were disclosed by Cert/CC as part of VU855201, titled L2 network security controls can be bypassed using VLAN 0 stacking and/or 802.3 headers "https://kb.cert.org/vuls/id/855201": CVE-2021-27853: Layer 2 network filteri...

多款Cisco产品安全漏洞

Cisco IOS and others are products of Cisco Corporation.Cisco IOS is a set of operating systems developed for its network devices.Cisco IOS XE Software is an operating system.Cisco Small Business is a switch.Cisco IOS XE Software is an operating system.Cisco Small Business is a switch. Cisco IOS...

PT-2022-9877 · Cisco · Cisco Ios +2

Name of the Vulnerable Software and Affected Versions: No specific software or versions are mentioned in the provided descriptions. Description: The issue allows Layer 2 network filtering capabilities, such as IPv6 RA guard, to be bypassed. This can be achieved by using LLC/SNAP headers with...

Cisco IOS XR Software Cisco Discovery Protocol Denial of Service Vulnerability

A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause the Cisco Discovery Protocol process to reload on an affected device. This vulnerability is due to a heap buffer overflow in certain Cisco Discovery...

PT-2022-5096 · Cisco · Cisco Ios Xr

Name of the Vulnerable Software and Affected Versions: Cisco IOS XR Software affected versions not specified Description: A vulnerability in the Cisco Discovery Protocol implementation could allow an unauthenticated, adjacent attacker to cause the Cisco Discovery Protocol process to reload on an...

CVE-2022-30211 Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability

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KLA12581 Multiple vulnerabilities in Microsoft Products (ESU)

Multiple vulnerabilities were found in Microsoft Products Extended Security Update. Malicious users can exploit these vulnerabilities to gain privileges, bypass security restrictions, obtain sensitive information, execute arbitrary code, cause denial of service. Below is a complete list of...

Griefing Attack By Extending The Reward Duration

Lines of code Vulnerability details Proof-Of-Concept The Gauge.notifyRewardAmount notifies the contract of a newly received rewards. This updates the local accounting and streams the reward over a preset period Five days. It was observed that this function is callable by anyone regardless of...

Siemens SIMATIC, SINUMERIK, and PROFINET IO Improper Input Validation (CVE-2018-4843)

A vulnerability has been identified in SIMATIC CP 343-1 incl. SIPLUS variants All versions, SIMATIC CP 343-1 Advanced incl. SIPLUS variants All versions, SIMATIC CP 443-1 All versions V3.3, SIMATIC CP 443-1 All versions V3.3, SIMATIC CP 443-1 Advanced All versions V3.3, SIMATIC ET 200pro IM154-8...

CVE-2022-22172

A Missing Release of Memory after Effective Lifetime vulnerability in the Layer-2 control protocols daemon l2cpd of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a memory leak. Continued exploitation can lead to memory exhaustion and thereby a...

Design/Logic Flaw

A Missing Release of Memory after Effective Lifetime vulnerability in the Layer-2 control protocols daemon l2cpd of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a memory leak. Continued exploitation can lead to memory exhaustion and thereby a...

CVE-2022-22172 Junos OS and Junos OS Evolved: An l2cpd memory leak can occur when specific LLDP packets are received leading to a DoS

A Missing Release of Memory after Effective Lifetime vulnerability in the Layer-2 control protocols daemon l2cpd of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a memory leak. Continued exploitation can lead to memory exhaustion and thereby a...

Siemens S7 Layer 2 - Denial of Service Exploit

Exploit Title: Siemens S7 Layer 2 - Denial of Service DoS Exploit Author: RoseSecurity Vendor Homepage: https://www.siemens.com/us/en.html Version: Firmware versions = 3 Tested on: Siemens S7-300, S7-400 PLCs !/usr/bin/python3 from scapy.all import from colorama import Fore, Back, Style from...

Siemens S7 Layer 2 Denial Of Service

Exploit Title: Siemens S7 Layer 2 - Denial of Service DoS Date: 21/10/2021 Exploit Author: RoseSecurity Vendor Homepage: https://www.siemens.com/us/en.html Version: Firmware versions = 3 Tested on: Siemens S7-300, S7-400 PLCs !/usr/bin/python3 from scapy.all import from colorama import Fore, Back...

SUSE SLES12 Security Update : kernel-firmware (SUSE-SU-2021:4200-1)

The remote SUSE Linux SLES12 / SLESSAP12 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2021:4200-1 advisory. - CVE-2019-15126: Updated Broadcom firmware to fix Kr00k bug bsc1167162. Tenable has extracted the preceding description block directly from...

CVE-2021-31365

An Uncontrolled Resource Consumption vulnerability in Juniper Networks Junos OS on EX2300, EX3400 and EX4300 Series platforms allows an adjacent attacker sending a stream of layer 2 frames will trigger an Aggregated Ethernet AE interface to go down and thereby causing a Denial of Service DoS. By...

Cisco IOS XE Software Interface Queue Wedge DoS (cisco-sa-quewedge-69BsHUBW)

According to its self-reported version, Cisco IOS-XE Software is affected by a vulnerability in the layer 2 punt code that allows an unauthenticated, adjacent attacker to cause a queue wedge on an interface that receives specific Layer 2 frames, resulting in a denial of service DoS condition. Thi...

CVE-2021-34779

Multiple vulnerabilities exist in the Link Layer Discovery Protocol LLDP implementation for Cisco Small Business 220 Series Smart Switches. An unauthenticated, adjacent attacker could perform the following: Execute code on the affected device or cause it to reload unexpectedly Cause LLDP database...

CVE-2021-34775

Multiple vulnerabilities exist in the Link Layer Discovery Protocol LLDP implementation for Cisco Small Business 220 Series Smart Switches. An unauthenticated, adjacent attacker could perform the following: Execute code on the affected device or cause it to reload unexpectedly Cause LLDP database...