Cisco’s Bootloader Blunder: Over 100 Switches Vulnerable to Signature Bypass Flaw
Hundreds of Cisco switches are affected by a bootloader flaw, allowing attackers to bypass image signature checks. The vulnerability, CVE-2024-20397, gives unauthorized access to modify software. Despite Cisco’s patches, there’s still no workaround. Good news, though—no one’s exploiting it yet. Bad news? Your switch may be having a mid-life crisis.
Hot Take:
Cisco’s got a switch problem—no, not the kind where you forget which light switch controls the kitchen. This one’s more like leaving your front door open with a neon sign that says “Hackers Welcome!”
Key Points:
- Cisco’s NX-OS bootloader vulnerability (CVE-2024-20397) has a CVSS score of 5.2.
- The flaw allows attackers to bypass image signature checks, potentially loading unverified software.
- Affected products include UCS 6500, MDS 9000, and various Nexus Series switches.
- No current workarounds or wild exploitation known.
- Nexus 92160YC-X won’t be getting a fix, as it’s reached the End of Vulnerability/Security Support.
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