Cisco Systems is warning of three vulnerabilities within its Internet Operating System (IOS) software that could allow a denial-of-service (DoS) attack or let a hacker run arbitrary code on an affected switch router.The company has published workarounds and issued an updated version of the software.The three problems are: TCP packet problem: A memory leak in certain versions of IOS could lead to a DoS attack, according to an advisory from the U.S. Computer Emergency Readiness Team (CERT). IPv6 router header vulnerability: IOS can fail to properly process IPv6 packets with specially crafted routing heads, which could allow a DoS attack or the running of arbitrary code. IPv6 is a set of specifications that enables more IP addresses to be available on the Internet. Crafted IP option vulnerability: This is a bug concerning how IOS processes IPv4 packets with a specially crafted IP option, CERT said. It could also enable a DoS attack or the running of arbitrary code.CERT wrote that all three vulnerabilities could cause a device to reload its OS. In that case, a secondary, sustained DoS condition could be caused since packets won’t go through the device. “Because devices running IOS may transmit traffic for a number of other networks, the secondary impacts of a denial of service may be severe,” CERT said.-Jeremy Kirk, IDG News Service (London Bureau) Check out our CIO News Alerts and Tech Informer pages for more updated news coverage. Related content brandpost Sponsored by Zscaler How customers capture real economic value with zero trust Unleashing economic value: Zscaler's Zero Trust Exchange transforms security architecture while cutting costs. By Zscaler Nov 30, 2023 4 mins Security brandpost Sponsored by SAP A cloud-based solution to rescue millions from energy poverty Aware of the correlation between energy and financial poverty, Savannah Energy is helping to generate clean, competitively priced electricity across Africa by integrating its old systems into one cloud-based platform. By Keith E. Greenberg, SAP Contributor Nov 30, 2023 5 mins Digital Transformation feature 8 change management questions every IT leader must answer Designed to speed adoption and achieve business outcomes, change management hasn’t historically been a strength of IT orgs. It’s time to flip that script by asking hard questions to hone change strategies. By Stephanie Overby Nov 30, 2023 10 mins Change Management IT Leadership feature CIO Darlene Taylor’s formula for success: Listen, drive, care This Motor City CIO says building and maintaining credibility starts with an empathy-driven approach, which has the potential to render you highly appealing to top talent. By Michael Bertha Nov 30, 2023 6 mins Automotive Industry IT Leadership Podcasts Videos Resources Events SUBSCRIBE TO OUR NEWSLETTER From our editors straight to your inbox Get started by entering your email address below. Please enter a valid email address Subscribe