Cisco xe

But this time, cisco xe, Apollo, I think we have a problem. On Monday, October 16th, Cisco released information about a vulnerability that affects devices running the IOS XE software alongside the web administration interface. Tracked as CVEthis vulnerability has the highest cisco xe score of 10 and can be exploited cisco xe without authentication, granting the attacker full administrative privileges. This backdoor activity was found because of an existing detection rule for an older vulnerability, CVE

Researchers have found since then that the vulnerability is widely being exploited in the wild to help install implants on affected switches and routers. Cisco IOS XE is a universally deployed Internetworking Operating System IOS that enables model-driven programmability, application hosting, and configuration management, helping to automate day-to-day tasks. The vulnerability at hand is listed as:. This vulnerability allows a remote, unauthenticated attacker to create an account on an affected system with privilege level 15 access. The attacker can then use that account to gain control of the affected system. Cisco has also yet to publish a list of affected devices, but if you are using Cisco switches, routers or Wireless LAN Controllers, you should assume they are vulnerable. The implants that were found enable the attacker to communicate with the compromised device and use that ability to monitor web traffic, perform lateral movement in the network, or use them for a machine-in-the-middle attack.

Cisco xe

This directory also contains reference PCAPs based on observed in-the-wild exploitation traffic:. For reference:. If the HTTP response consists of a hexadecimal string, this is a high-confidence indicator that the device is compromised. However, as multiple sources have mentioned 2 3 , the number of implants that can be discovered using this method has gone down significantly. Investigated network traffic to a compromised device has shown that the threat actor has upgraded the implant to do an extra header check. Thus, for a lot of devices, the implant is still active, but now only responds if the correct Authorization HTTP header is set. We took another look at the initial blogpost by Cisco Talos and noticed an extra location check in the implant code:. Based on the above screenshot of the implant code shared by Cisco Talos we found another method that can be used to fingerprint the presence of the implant. This will cause the server to respond with a different HTTP response than it normally would when the implant is not running. There are currently three known versions of the implant. An example HTTP body is as such:. The third variant returns the login page rather than the

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Official websites use. Share sensitive information only on official, secure websites. Note: CISA will continue to update this webpage as we have further guidance to impart. An unauthenticated remote actor could exploit these vulnerabilities to take control of an affected system. Specifically, these vulnerabilities allow the actor to create a privileged account that provides complete control over the device. According to the Cisco Talos blog, Active exploitation of Cisco IOS XE Software Web Management User Interface vulnerabilities , "Organizations should look for unexplained or newly created users on devices as evidence of potentially malicious activity relating to this threat.

What You Will Learn. The schedule specifies 3 individual software releases per year at 4 month intervals. Release Name. Identifies a series of annual releases. Major Release.

Cisco xe

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product.

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When a single process crashes, it no longer takes down the entire OS. An example HTTP body is as such:. The Cisco Talos team discovered there were malicious activities correlated with this vulnerability as early as September 18, However, as multiple sources have mentioned 2 3 , the number of implants that can be discovered using this method has gone down significantly. If the request returns a hexadecimal string, the implant is present. Drive operational excellence with services to help improve security and visibility. Cisco has also yet to publish a list of affected devices, but if you are using Cisco switches, routers or Wireless LAN Controllers, you should assume they are vulnerable. Specifically, these vulnerabilities allow the actor to create a privileged account that provides complete control over the device. Skip to content. About the Author. Back to Resources Hub. Threat Center.

This release is positioned to bring in enhanced features that will be unique to Cisco and will serve as the key differentiator for Cisco. It is a standard maintenance release and has a support lifetime of 12 months. In this new release, the multicast traffic option is available for the AppGig interface unlocking additional use cases of hosted applications requiring multicast traffic.

Additional system functions now run as additional, separate processes in the host OS environment. The Cisco Talos team discovered there were malicious activities correlated with this vulnerability as early as September 18, Latest commit. But this time, Apollo, I think we have a problem. Note: The above check should use the HTTP scheme if the device is only configured for an insecure web interface. March 13, - A hoax telling people to copy and paste a copyright notice on Facebook has been making the rounds since When a single process crashes, it no longer takes down the entire OS. The implants that were found enable the attacker to communicate with the compromised device and use that ability to monitor web traffic, perform lateral movement in the network, or use them for a machine-in-the-middle attack. The silver lining is that awareness about this attack has spread. The attacker can then use that account to gain control of the affected system.