Windows 10: Cisco web extension crash

MonicaMcMahon · Feb 1, 2020

I have been having problems accessing google chrome because an extension called Cisco WebEx keeps crashing with the persistantly annoying message Aw, Snap, something went wrong while displaying this web page. Ive tried all the options suggested , each time i think ive got it sorted, when i log off and try to reload chrome the same thing happens. Can ANYONE help me once and for all to sort this out

:)

IggSter · Feb 1, 2020

How to factory reset Cisco 1700 Router

Hopefully I can help you here....its a very common thing to happen.

First, I take it you dont know the passwords for console access or telnet/ssh?

I will assume that these devices belong to you.

step 1. Plug a cisco console cable into a serial port on your pc
step 2. Plug other end into Cisco console port
step 3. Using hyperterm or putty or similar connect to the serial port
step 4. boot router, and make sure you clearly can see the output (this confirms you have good serial comms)
step 5. if this fails, adjust the comm port settings (9600, 8,1,n are the default)
step 6. now you have to do the only hard part...send the break command:

Break command list: Break Commands

Go down the list and match your OS and SW and try the sequence suggested.

If this fails several times do what I do: Install putty (free) and then to send a break so you can get into rommom just hit "ctrl-a b".

Borg 386 · Feb 1, 2020

Cisco zero-day exploited in the wild to crash and reload devices

The Cisco security team has revealed earlier the existence of a zero-day vulnerability affecting products that run Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) software.

The vulnerability has been exploited in the wild, according to a security advisory the company published a few hours ago. No patches are available at the time of writing.
Click to expand...

Cisco says CVE-2018-15454 "could allow an unauthenticated, remote attacker to cause an affected device to reload or trigger high CPU, resulting in a denial of service (DoS) condition."

Because SIP inspection is enabled by default in all ASA and FTD software packages, a large number of Cisco devices are believed to be vulnerable. Cisco has already confirmed that the following products are affected if they run ASA 9.4 and later, or FTD 6.0 and later:

3000 Series Industrial Security Appliance (ISA)

ASA 5500-X Series Next-Generation Firewalls

ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers

Adaptive Security Virtual Appliance (ASAv)

Firepower 2100 Series Security Appliance

Firepower 4100 Series Security Appliance

Firepower 9300 ASA Security Module

FTD Virtual (FTDv)

Until Cisco ships ASA and FTD software updates to address with this vulnerability, Cisco has provided three mitigations that devices owners can take and prevent a remote attacker from crashing their equipment.

The most obvious one is for device owners to disable SIP inspection. Second, if device owners have managed to identify an attacker's IP address, they can block traffic from that IP using the ASA and FTD traffic filtering systems at their disposal.

Furthermore, Cisco says that malicious traffic that has been observed in attacks until now has also used the 0.0.0.0 IP address for the "Sent-by Address" field, which also makes it easy for companies to filter an attacker's incoming traffic.

Step-by-step information on how to configure these mitigations, but also on how to determine if an ASA or FTD device has been hit by CVE-2018-15454 are available in Cisco's advisory.
Click to expand...

https://tools.cisco.com/security/cen...asaftd-sip-dos

Cisco zero-day exploited in the wild to crash and reload devices | ZDNet

Brink · Feb 1, 2020

Cisco zero-day exploited in the wild to crash and reload devices

The Cisco security team has revealed earlier the existence of a zero-day vulnerability affecting products that run Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) software.

The vulnerability has been exploited in the wild, according to a security advisory the company published a few hours ago. No patches are available at the time of writing.
Click to expand...

Cisco says CVE-2018-15454 "could allow an unauthenticated, remote attacker to cause an affected device to reload or trigger high CPU, resulting in a denial of service (DoS) condition."

Because SIP inspection is enabled by default in all ASA and FTD software packages, a large number of Cisco devices are believed to be vulnerable. Cisco has already confirmed that the following products are affected if they run ASA 9.4 and later, or FTD 6.0 and later:

3000 Series Industrial Security Appliance (ISA)

ASA 5500-X Series Next-Generation Firewalls

ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers

Adaptive Security Virtual Appliance (ASAv)

Firepower 2100 Series Security Appliance

Firepower 4100 Series Security Appliance

Firepower 9300 ASA Security Module

FTD Virtual (FTDv)

Until Cisco ships ASA and FTD software updates to address with this vulnerability, Cisco has provided three mitigations that devices owners can take and prevent a remote attacker from crashing their equipment.

The most obvious one is for device owners to disable SIP inspection. Second, if device owners have managed to identify an attacker's IP address, they can block traffic from that IP using the ASA and FTD traffic filtering systems at their disposal.

Furthermore, Cisco says that malicious traffic that has been observed in attacks until now has also used the 0.0.0.0 IP address for the "Sent-by Address" field, which also makes it easy for companies to filter an attacker's incoming traffic.

Step-by-step information on how to configure these mitigations, but also on how to determine if an ASA or FTD device has been hit by CVE-2018-15454 are available in Cisco's advisory.
Click to expand...

https://tools.cisco.com/security/cen...asaftd-sip-dos

Cisco zero-day exploited in the wild to crash and reload devices | ZDNet

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