Vulnerability-Lookup

GHSA-4V4G-726H-XVFV

Vulnerability from github – Published: 2021-04-19 14:59 – Updated: 2023-03-17 17:49

Summary

Padding Oracle Attack due to Observable Timing Discrepancy in jose-node-esm-runtime

Details

Impact

AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed JWEDecryptionFailed would be thrown. But a possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a padding oracle and an adversary might be able to make use of that oracle to decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block).

Patches

A patch was released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are >=3.11.4.

Users should upgrade to ^3.11.4.

Credits

Thanks to Morgan Brown of Microsoft for bringing this up and Eva Sarafianou (@esarafianou) for helping to score this advisory.

Severity

5.9 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "jose-node-esm-runtime"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.11.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-29445"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-203",
      "CWE-208",
      "CWE-696"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-04-16T23:00:41Z",
    "nvd_published_at": "2021-04-16T22:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\n[AES_CBC_HMAC_SHA2 Algorithm](https://tools.ietf.org/html/rfc7518#section-5.2) (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed `JWEDecryptionFailed` would be thrown. But a possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a padding oracle and an adversary might be able to make use of that oracle to decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block).\n\n### Patches\n\nA patch was released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are `\u003e=3.11.4`.\n\nUsers should upgrade to `^3.11.4`.\n\n### Credits\nThanks to Morgan Brown of Microsoft for bringing this up and Eva Sarafianou (@esarafianou) for helping to score this advisory.",
  "id": "GHSA-4v4g-726h-xvfv",
  "modified": "2023-03-17T17:49:46Z",
  "published": "2021-04-19T14:59:06Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/panva/jose/security/advisories/GHSA-4v4g-726h-xvfv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29445"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/panva/jose"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/jose-node-esm-runtime"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Padding Oracle Attack due to Observable Timing Discrepancy in jose-node-esm-runtime"
}

CVE-2021-29445 (GCVE-0-2021-29445)

Vulnerability from cvelistv5 – Published: 2021-04-16 21:50 – Updated: 2024-08-03 22:02

Title

Padding Oracle Attack due to Observable Timing Discrepancy in jose-node-esm-runtime

Summary

jose-node-esm-runtime is an npm package which provides a number of cryptographic functions. In versions prior to 3.11.4 the AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed `JWEDecryptionFailed` would be thrown. But a possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a padding oracle and an adversary might be able to make use of that oracle to decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). A patch was released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are `>=3.11.4`. Users should upgrade to `^3.11.4`.

Severity

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-203 - {"CWE-203":"Observable Discrepancy"}

Assigner

GitHub_M mitre root Scorecard

References

2 references

URL	Tags
https://github.com/panva/jose/security/advisories…	x_refsource_CONFIRM
https://www.npmjs.com/package/jose-node-esm-runtime	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
panva	jose-node-esm-runtime	Affected: < 3.11.4

Show details on NVD website

JSON

To clipboard

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            "url": "https://github.com/panva/jose/security/advisories/GHSA-4v4g-726h-xvfv"
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            "url": "https://www.npmjs.com/package/jose-node-esm-runtime"
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        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
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        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "HIGH",
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            "availabilityImpact": "NONE",
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      "title": "Padding Oracle Attack due to Observable Timing Discrepancy in jose-node-esm-runtime",
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        "affects": {
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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