Should I use local or remote authentication on Cisco IOS software?
However, on Cisco IOS software releases that support the use of secret passwords for locally defined users, fallback to local authentication can be desirable. This allows for a locally defined user to be created for one or more network administrators.
What is resilient configuration in Cisco IOS software?
Added in Cisco IOS Software Release 12.3 (8)T, the Resilient Configuration feature makes it possible to securely store a copy of the Cisco IOS software image and device configuration that is currently used by a Cisco IOS device. When this feature is enabled, it is not possible to alter or remove these backup files.
How do I disable an AUX port in Cisco IOS?
An AUX port can be disabled with these commands: ! ! Interactive management sessions in Cisco IOS software use a tty or virtual tty (vty). A tty is a local asynchronous line to which a terminal can be attached for local access to the device or to a modem for dialup access to a device.
Are Cisco IOS device configurations alone secure a network?
Although most of this document is devoted to the secure configuration of a Cisco IOS device, configurations alone do not completely secure a network. The operational procedures in use on the network contribute as much to security as the configuration of the underlying devices.
What is Cisco Secure Endpoint?
Cisco Secure Endpoint New packages fit for every organization Every Cisco Secure Endpoint (formerly AMP for Endpoints) package comes with Cisco SecureX built-in. It’s our cloud-native platform that integrates all your security solutions into one view wit... view more
Can scanner point to ssh?
It can be anything. The scanner can point to ssh,FTP or even UDP for Iskamp. In my case its pointing to ssh and UDP for Iskamp.
How many vulnerabilities are there in Cisco?
Cisco has noted a whopping 34 vulnerabilities across two of its remote access and network inspection devices on May 6, 2020. While it is important to patch all of them, there are a dozen that require your immediate attention, with an especially concerning duo of vulnerabilities that we’ll cover first:
What is the CVE-2020-3529 vulnerability?
The weaknesses patched in CVE-2020-3529 allow attackers to use a simple GET request (if they craft the right HTTP path specification) to grab the content of device memory, which will invariably contain usable confidential information as well.
How many ASA targets are there?
As noted below, they have over 250,000 ASA targets to practice on, with over 43% of these exposed devices residing in U.S.-homed networks.
Is it advisable to postpone patching DoS vulnerabilities?
Given the recent significant increase in the percentage of remote workers in most organizations, it is inadvisable to postpone patching DoS weaknesses as you may have in the past. What previously may have been a minor, temporary disruption may now turn into a significant interruption in service and, even worse for their paired disclosure weaknesses, a breach of confidentiality.
What to do if Cisco is not clear?
If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
Why is XML vulnerable?
The vulnerability is due to an issue with allocating and freeing memory when processing a malicious XML payload. An attacker could exploit this vulnerability by sending a crafted XML packet to a vulnerable interface on an affected system. An exploit could allow the attacker to execute arbitrary code and obtain full control of the system, cause a reload of the affected device or stop processing of incoming VPN authentication requests.
What is the left column in Cisco FTD?
In the following table, the left column lists the vulnerable Cisco FTD features. The right column indicates the vulnerable configuration from the CLI command show running-config, if it can be determined.
Does IKEv2 enable SSL?
Note: While certain IKEv2 feature sets do not enable the underlying SSL TCP listening socket, they may still be vulnerable. Customers can use the CLI command show running-config crypto ikev2 to check if the configuration command crypto ikev2 enable is present in the configuration.
Does Cisco release free software updates?
Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
Is AnyConnect Secure Mobility Client vulnerable?
Cisco has confirmed that the AnyConnect Secure Mobility Client is not vulnerable.
Is Cisco Security Manager vulnerable?
2 Cisco Security Manager is vulnerable only from an IP address in the configured http command range.
What is SSHv2 in Cisco?
The SSHv2 support feature introduced in Cisco IOS Software Release 12.3 (4)T allows a user to configure SSHv2. (SSHv1 support was implemented in an earlier release of Cisco IOS Software.) SSH runs on top of a reliable transport layer and provides strong authentication and encryption capabilities. The only reliable transport that is defined for SSH is TCP. SSH provides a means to securely access and securely execute commands on another computer or device over a network. The Secure Copy Protocol (SCP) feature that is tunneled over SSH allows for the secure transfer of files.
Why is Cisco IOS using a log buffer?
Cisco IOS software supports the use of a local log buffer so that an administrator can view locally generated log messages. The use of buffered logging is highly recommended versus logging to either the console or monitor sessions.
What is tcp keepalives?
The service tcp-keepalives-in and service tcp-keepalives-out global configuration commands enable a device to send TCP keepalives for TCP sessions. This configuration must be used in order to enable TCP keepalives on inbound connections to the device and outbound connections from the device. This ensures that the device on the remote end of the connection is still accessible and that half-open or orphaned connections are removed from the local Cisco IOS device.
What is console port Cisco?
In Cisco IOS devices, console and auxiliary (AUX) ports are asynchronous lines that can be used for local and remote access to a device. You must be aware that console ports on Cisco IOS devices have special privileges. In particular, these privileges allow an administrator to perform the password recovery procedure. In order to perform password recovery, an unauthenticated attacker would need to have access to the console port and the ability to interrupt power to the device or to cause the device to crash.
What is enhanced password security?
The feature Enhanced Password Security, introduced in Cisco IOS Software Release 12.2 (8)T, allows an administrator to configure MD5 hashing of passwords for the username command . Prior to this feature, there were two types of passwords: Type 0, which is a cleartext password, and Type 7, which uses the algorithm from the Vigen re cipher. The Enhanced Password Security feature cannot be used with protocols that require the cleartext password to be retrievable, such as CHAP.
What is Cisco IOS?
This document describes the information to help you secure your Cisco IOS ® system devices, which increases the overall security of your network. Structured around the three planes into which functions of a network device can be categorized, this document provides an overview of each included feature and references to related documentation.
Can you monitor malicious users?
In some legal jurisdictions, it can be impossible to prosecute and illegal to monitor malicious users unless they have been notified that they are not permitted to use the system. One method to provide this notification is to place this information into a banner message that is configured with the Cisco IOS software banner login command.
Overview of The Two Major Cisco Vulnerabilities
Exploiting The Cisco Vulnerabilities
- There is no known, public proof of concept (PoC) code for either vulnerability, but it’s fairly trivial for attackers to gain access to ASA and FTD virtual images to start looking and it is only a matter of time—likely very short, as has been the case for many remotely exploitable vulnerabilities in security-oriented services in 2020—before knowledge of the specially crafted, memory dumping …
Guidance on Remediating The Cisco Vulnerabilities
- Rapid7 is strongly urging all organizations with affected systems to patch today or this weekend. You can use this linkto determine whether the configuration of your version of ASA or FTD is vulnerable. As you are working with your operations and network teams to triage and implement the patches, you should configure your logging and monitoring systems to watch for excessive …
Summary
- Update from February 5, 2018: After further investigation, Cisco has identified additional attack vectors and features that are affected by this vulnerability. In addition, it was also found that t...
Workarounds
- There are no workarounds that address all the features that are affected by this vulnerability. The management access to the security appliance can be restricted to known, trusted hosts using the C...
Fixed Software
- Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which th...
Exploitation and Public Announcements
- The Cisco Product Security Incident Response Team (PSIRT) is aware of public knowledge of the vulnerability that is described in this advisory. Cisco PSIRT is aware of attempted malicious use of th...
Source
- Cisco would like to thank Cedric Halbronn from the NCC Group for finding and reporting this vulnerability.