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* Cisco fixes NFVIS bugs that help gain root and hijack hosts
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*
CISCO FIXES NFVIS BUGS THAT HELP GAIN ROOT AND HIJACK HOSTS
By
SERGIU GATLAN
* May 4, 2022
* 03:58 PM
* 0
Cisco has addressed several security flaws found in the Enterprise NFV
Infrastructure Software (NFVIS), a solution that helps virtualize network
services for easier management of virtual network functions (VNFs).
Two of them, rated critical and high severity, can be exploited by attackers to
run commands with root privileges or to escape the guest virtual machine (VM)
and fully compromise NFVIS hosts.
Cisco's Product Security Incident Response Team (PSIRT) says there is no
proof-of-concept exploit code and no ongoing exploitation in the wild.
PLAY Top Articles Video Settings Full Screen About Connatix V160773 Read More
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ROOT ACCESS TO NFVIS HOSTS
One of them, a critical guest escape tracked as CVE-2022-20777, was found in
Cisco Enterprise NFVIS' Next Generation Input/Output (NGIO) feature.
CVE-2022-20777 is caused by insufficient guest restrictions and
allows authenticated attackers to escape the guest VM and gain root-level access
to the host in low complexity attacks without requiring user interaction.
"An attacker could exploit this vulnerability by sending an API call from a VM
that will execute with root-level privileges on the NFVIS host. A successful
exploit could allow the attacker compromise the NFVIS host completely," Cisco
explained.
The second (tracked as CVE-2022-20779) is a high severity command injection
vulnerability in the image registration process of Cisco Enterprise NFVIS due
to improper input validation.
Unauthenticated attackers can exploit it remotely to inject commands that
execute with root privileges on the host during the image registration process
in low-complexity attacks that require interaction.
"An attacker could exploit this vulnerability by persuading an administrator on
the host machine to install a VM image with crafted metadata that will execute
commands with root-level privileges during the VM registration process," Cisco
added.
"A successful exploit could allow the attacker to inject commands with
root-level privileges into the NFVIS host."
The company has released security updates to fix these flaws and said that there
are no workarounds to address the vulnerabilities.
Cisco Enterprise NFVIS Release First Fixed Release Earlier than 4.0 Migrate to a
fixed release. 4.0 4.7.1
Last month, Cisco also fixed a bug in the Cisco Umbrella Virtual Appliance (VA)
that let unauthenticated attackers steal admin credentials remotely.
One week before, the company asked customers to apply security updates to patch
a maximum severity vulnerability in the Wireless LAN Controller (WLC) software
that enabled hackers to craft their own login credentials.
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SERGIU GATLAN
Sergiu Gatlan is a reporter who covered cybersecurity, technology, Apple,
Google, and a few other topics at Softpedia for more than a decade. Email or
Twitter DMs for tips.
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