A bootloader vulnerability in Cisco NX-OS affects over 100 switches, enabling attackers to bypass image signature checks.
Cisco issued security patches for the vulnerability CVE-2024-20397 (CVSS score of 5.2) in NX-OS software’s bootloader, which could allow attackers to bypass image signature verification.
By infosecbulletin
/ Sunday , June 1 2025
A hacker known as "303" claim to breach the company's systems and leaked sensitive internal data on a dark web...
Read More
By infosecbulletin
/ Sunday , June 1 2025
CISA and ACSC issued new guidance this week on how to procure, implement, and maintain SIEM and SOAR platforms. SIEM...
Read More
By infosecbulletin
/ Saturday , May 31 2025
The Qualys Threat Research Unit (TRU) found two local information-disclosure vulnerabilities in Apport and systemd-coredump. Both issues are race-condition vulnerabilities....
Read More
By infosecbulletin
/ Saturday , May 31 2025
New ransomware payment reporting rules take effect in Australia yesterday (May 30) for all organisations with an annual turnover of...
Read More
By infosecbulletin
/ Saturday , May 31 2025
Global makers of surveillance gear have clashed with Indian regulators in recent weeks over contentious new security rules that require...
Read More
By infosecbulletin
/ Thursday , May 29 2025
GreyNoise has discovered a campaign where attackers have gained unauthorized access to thousands of internet-exposed ASUS routers. This seems to...
Read More
By infosecbulletin
/ Wednesday , May 28 2025
The rise of online gambling in the country is leading to increased crime and societal issues. In response, the central...
Read More
By infosecbulletin
/ Wednesday , May 28 2025
Cybersecurity researchers recently revealed a coordinated cloud-based scanning attack that targeted 75 different exposure points earlier this month. On May...
Read More
By infosecbulletin
/ Monday , May 26 2025
Recent security research has shown that attackers can weaken zero-trust security frameworks by exploiting a key DNS vulnerability, disrupting automated...
Read More
By infosecbulletin
/ Saturday , May 24 2025
Evaly, a Bangladeshi e-commerce platform, is reportedly facing a major data breach that may have exposed sensitive information of around...
Read More
“A vulnerability in the bootloader of Cisco NX-OS Software could allow an unauthenticated attacker with physical access to an affected device, or an authenticated, local attacker with administrative credentials, to bypass NX-OS image signature verification.” reads the advisory.
The vulnerability stems from insecure bootloader settings, allowing an attacker to run specific bootloader commands to exploit it.
“A successful exploit could allow the attacker to bypass NX-OS image signature verification and load unverified software.” continues the advisory.
This vulnerability affects certain Cisco products running vulnerable BIOS versions, regardless of their configuration:
UCS 6400 Series Fabric Interconnects (CSCwj35846)
UCS 6500 Series Fabric Interconnects (CSCwj35846)
Nexus 9000 Series Fabric Switches in ACI mode (CSCwn11901)
Nexus 9000 Series Switches in standalone NX-OS mode (CSCwm47438)
MDS 9000 Series Multilayer Switches (CSCwh76163)
Nexus 3000 Series Switches (CSCwm47438)
Nexus 7000 Series Switches (CSCwh76166)
Cisco has stated that there are no solutions to fix this vulnerability.
PSIRT is not aware of any real-world attacks using this vulnerability CVE-2024-20397
Cisco will not fix the vulnerability for Nexus 92160YC-X since it is no longer supported.