Vulnerability-Lookup

PYSEC-2026-1066

Vulnerability from pysec - Published: 2026-07-06 08:03 - Updated: 2026-07-07 11:31

Details

wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or--enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.

Severity

4.7 (Medium)


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

Impacted products

Name	purl
wolfcrypt	pkg:pypi/wolfcrypt

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "wolfcrypt",
        "purl": "pkg:pypi/wolfcrypt"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.1.8",
        "0.1.9",
        "0.2.0",
        "0.2.6",
        "3.12.2.post0",
        "3.13.0.post1",
        "3.14.0.post1",
        "3.14.2.post0"
      ]
    }
  ],
  "aliases": [
    "CVE-2019-13628",
    "GHSA-q95h-vc86-hv77"
  ],
  "details": "wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without `--enable-fpecc`, `--enable-sp`, or` --enable-sp-math`) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.",
  "id": "PYSEC-2026-1066",
  "modified": "2026-07-07T11:31:26.691267Z",
  "published": "2026-07-06T08:03:28.431283Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-13628"
    },
    {
      "type": "WEB",
      "url": "https://eprint.iacr.org/2011/232.pdf"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/wolfSSL/wolfcrypt-py"
    },
    {
      "type": "WEB",
      "url": "https://minerva.crocs.fi.muni.cz"
    },
    {
      "type": "WEB",
      "url": "https://tches.iacr.org/index.php/TCHES/article/view/7337"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2019/10/02/2"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/wolfcrypt"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-q95h-vc86-hv77"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "wolfCrypt leaks cryptographic information via timing side channel"
}

CVE-2019-13628 (GCVE-0-2019-13628)

Vulnerability from cvelistv5 – Published: 2019-10-03 13:20 – Updated: 2024-08-04 23:57

Summary

wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.

Severity

No CVSS data available.

CWE

Assigner

mitre

References

4 references

URL	Tags
https://eprint.iacr.org/2011/232.pdf	x_refsource_MISC
https://tches.iacr.org/index.php/TCHES/article/vi…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2019/10/02/2	mailing-listx_refsource_MLIST
https://minerva.crocs.fi.muni.cz/	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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          "dateUpdated": "2024-08-04T23:57:39.493Z",
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        "references": [
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            "tags": [
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            "url": "https://eprint.iacr.org/2011/232.pdf"
          },
          {
            "tags": [
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            ],
            "url": "https://tches.iacr.org/index.php/TCHES/article/view/7337"
          },
          {
            "name": "[oss-security] 20191002 Minerva: ECDSA key recovery from bit-length leakage",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2019/10/02/2"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://minerva.crocs.fi.muni.cz/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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          "versions": [
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without --enable-fpecc, --enable-sp, or --enable-sp-math) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length."
        }
      ],
      "problemTypes": [
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          "descriptions": [
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      ],
      "providerMetadata": {
        "dateUpdated": "2019-10-03T13:21:33.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
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          "url": "https://eprint.iacr.org/2011/232.pdf"
        },
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          "tags": [
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          "url": "https://tches.iacr.org/index.php/TCHES/article/view/7337"
        },
        {
          "name": "[oss-security] 20191002 Minerva: ECDSA key recovery from bit-length leakage",
          "tags": [
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          ],
          "url": "http://www.openwall.com/lists/oss-security/2019/10/02/2"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://minerva.crocs.fi.muni.cz/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2019-13628",
          "STATE": "PUBLIC"
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        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
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                "vendor_name": "n/a"
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            }
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            },
            {
              "name": "https://tches.iacr.org/index.php/TCHES/article/view/7337",
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              "url": "https://tches.iacr.org/index.php/TCHES/article/view/7337"
            },
            {
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              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2019/10/02/2"
            },
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    "dateReserved": "2019-07-17T00:00:00.000Z",
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GHSA-Q95H-VC86-HV77

Vulnerability from github – Published: 2022-05-24 16:57 – Updated: 2023-09-25 19:35

Summary

wolfCrypt leaks cryptographic information via timing side channel

Details

Severity

4.7 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.0.0"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "wolfcrypt"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2019-13628"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-203"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-07-17T22:25:50Z",
    "nvd_published_at": "2019-10-03T14:15:00Z",
    "severity": "MODERATE"
  },
  "details": "wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without `--enable-fpecc`, `--enable-sp`, or` --enable-sp-math`) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.",
  "id": "GHSA-q95h-vc86-hv77",
  "modified": "2023-09-25T19:35:50Z",
  "published": "2022-05-24T16:57:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-13628"
    },
    {
      "type": "WEB",
      "url": "https://eprint.iacr.org/2011/232.pdf"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/wolfSSL/wolfcrypt-py"
    },
    {
      "type": "WEB",
      "url": "https://minerva.crocs.fi.muni.cz"
    },
    {
      "type": "WEB",
      "url": "https://tches.iacr.org/index.php/TCHES/article/view/7337"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2019/10/02/2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "wolfCrypt leaks cryptographic information via timing side channel"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

PYSEC-2026-1066

CVE-2019-13628 (GCVE-0-2019-13628)

GHSA-Q95H-VC86-HV77

Tags

Sightings

Nomenclature