CVE-2021-1104

The RISC-V Instruction Set Manual contains a documented ambiguity for the Machine Trap Vector Base Address (MTVEC) register that may lead to a vulnerability…

published August 13, 2021

CVSS
—
EPSS
2%
Percentile
76.5
In the wild
Unconfirmed
What it is

⚡ The RISC-V Instruction Set Manual harbors a sneaky ambiguity in its Machine Trap Vector Base Address (MTVEC) register that might leave your system exposed! 😱 Think of the MTVEC as a misplaced book on a library shelf with no clear category. Without proper organization, anyone can grab the book, read its content, and potentially misrepresent the information or even cause chaos! 📚 Here’s the kicker: without a defined initial state, it could lead to unauthorized information disclosure, unexpected data tampering, or even denial of service! Imagine someone wandering into the library, taking that misplaced book, and using it to spread misinformation or cause confusion among users.

Put simply

Think of the MTVEC as a misplaced book on a library shelf with no clear category. Without proper organization, anyone can grab the book, read its content, and potentially misrepresent the information or even cause chaos! 📚 The ambiguity arises because the initial state of the MTVEC register isn't clearly defined, which could allow attackers to exploit this uncertainty, leading to potentially malicious outcomes.

What to do

Here’s the kicker: without a defined initial state, it could lead to unauthorized information disclosure, unexpected data tampering, or even denial of service! Imagine someone wandering into the library, taking that misplaced book, and using it to spread misinformation or cause confusion among users. While there's no immediate fix required since it's not widely exploited, it’s wise to keep an eye on updates from RISC-V maintainers for clarifications. Regularly review your system configurations to ensure they comply with the best practices and consider implementing additional layers of security as a precaution. You've got this! Stay informed and proactive, and you'll keep those vulnerabilities at bay! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01663 · 76.5th percentile
Published
2021-08-13T15:40Z
EPSS history
Timeline
  • 13 AUG 15:40Z
    The RISC-V Instruction Set Manual contains a documented ambiguity for the Machine Trap Vector Base Address (MTVEC) register that may lead to a vulnerability…
    cvelistv5