#cisco

A vulnerability in the implementation of IPv6 VPN over MPLS (6VPE) with Zone-Based Firewall (ZBFW) of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error handling of an IPv6 packet that is forwarded from an MPLS and ZBFW-enabled interface in a 6VPE deployment. An attacker could exploit this vulnerability by sending a crafted IPv6 packet sourced from a device on the IPv6-enabled virtual routing and forwarding (VRF) interface through the affected device. A successful exploit could allow the attacker to reload the device, resulting in a DoS condition.

A vulnerability in the SSH implementation of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. This vulnerability is due to improper handling of resources during an exceptional situation. An attacker could exploit this vulnerability by continuously connecting to an affected device and sending specific SSH requests. A successful exploit could allow the attacker to cause the affected device to reload.

A vulnerability in the software image verification functionality of Cisco IOS XE Software for Cisco Catalyst 9200 Series Switches could allow an unauthenticated, physical attacker to execute unsigned code at system boot time. This vulnerability is due to an improper check in the code function that manages the verification of the digital signatures of system image files during the initial boot process. An attacker could exploit this vulnerability by loading unsigned software on an affected device. A successful exploit could allow the attacker to boot a malicious software image or execute unsigned code and bypass the image verification check part of the boot process of the affected device. To exploit this vulnerability, the attacker needs either unauthenticated physical access to the device or privileged access to the root shell on the device. Note: In Cisco IOS XE Software releases 16.11.1 and later, root shell access is protected by the Consent Token mechanism. However, an attacker wit...

Marcin “Icewall” Noga of Cisco Talos discovered this vulnerability. Blog by Jon Munshaw.  Cisco Talos recently discovered an exploitable data deserialization vulnerability in the VMware vCenter server platform.   VMware is one of the most popular virtual machine solutions currently available, and its vCenter software allows users to manage an entire environment of VMs. The vulnerability Talos discovered is a post-authentication Java deserialization issue that could corrupt the software in a way that could allow an attacker to exploit arbitrary code on the target machine. TALOS-2022-1587 (CVE-2022-31680) is triggered if an adversary sends a specially crafted HTTP request to a targeted machine. The attacker would first have to log in with legitimate credentials to vCenter to be successful.  Cisco Talos worked with VMware to ensure that this issue is resolved and an update is available for affected customers, all in adherence to Cisco’s vulnerability disclosure policy.  Users are enc...

VMware ESXi contains a null-pointer deference vulnerability. A malicious actor with privileges within the VMX process only, may create a denial of service condition on the host.

A buffer underflow vulnerability exists in the way Hword of Hancom Office 2020 version 11.0.0.5357 parses XML-based office files. A specially-crafted malformed file can cause memory corruption by using memory before buffer start, which can lead to code execution. A victim would need to access a malicious file to trigger this vulnerability.

Marcin “Icewall” Noga of Cisco Talos discovered this vulnerability. Blog by Jon Munshaw.  Cisco Talos recently discovered an exploitable memory corruption vulnerability in Hancom Office 2020.   Hancom Office is a popular software collection among South Korean users that offers similar products to Microsoft Office, such as word processing and spreadsheet creation and management.   TALOS-2022-1574 (CVE-2022-33896) exists in the way the Hword word processing software processes XML files. An attacker could exploit this vulnerability by tricking the user into opening a specially crafted file, triggering a memory corruption error on the software and potentially leading to remote code execution on the targeted machine.    Cisco Talos worked with Hancom to ensure that this issue is resolved and an update is available for affected customers, all in adherence to Cisco’s vulnerability disclosure policy.  Users are encouraged to update these affected products as soon as possible: Hancom Offic...

By Jon Munshaw.  Welcome to this week’s edition of the Threat Source newsletter.  As I wrote about last week, I’ve been diving a lot into apps’ privacy policies recently. And I was recently made aware of a new type of app I never knew existed — family trackers.  There are countless mobile apps for parents to track their children or other family members based on their location, phone usage, and even driving speed. As an anxious soon-to-be-parent, this sounds intriguing to me — it’d be a supped-up version of Find my Friends on Apple devices so I’d never have to ask my teenager (granted, I’m many years away from being at that stage of my life) when they were coming home or where they were.  Just as with all other types of mobile apps, there are pitfalls, though.   Life360, one of the most popular of these types of apps and even tells users what their maximum driving speed was on a given trip, was found in December 2021 to be selling precise location data on its users, potentia...

Any time we welcome this software and hardware into our homes and on our devices, it’s worth considering what sacrifices we might be making elsewhere.

A U.S. federal court jury has found former Uber Chief Security Officer Joseph Sullivan guilty of not disclosing a 2016 breach of customer and driver records to regulators and attempting to cover up the incident. Sullivan has been convicted on two counts: One for obstructing justice by not reporting the incident and another for misprision. He faces a maximum of five years in prison for the