github - ghsa-g9j4-hp3j-g668

GHSA-G9J4-HP3J-G668

Vulnerability from github – Published: 2022-05-24 22:01 – Updated: 2024-04-04 03:07

Details

A side-channel issue was discovered in Botan before 2.9.0. An attacker capable of precisely measuring the time taken for ECC key generation may be able to derive information about the high bits of the secret key, as the function to derive the public point from the secret scalar uses an unblinded Montgomery ladder whose loop iteration count depends on the bitlength of the secret. This issue affects only key generation, not ECDSA signatures or ECDH key agreement.

Severity ?

5.9 (Medium)


                  
                    CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2018-20187"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-03-08T19:29:00Z",
    "severity": "MODERATE"
  },
  "details": "A side-channel issue was discovered in Botan before 2.9.0. An attacker capable of precisely measuring the time taken for ECC key generation may be able to derive information about the high bits of the secret key, as the function to derive the public point from the secret scalar uses an unblinded Montgomery ladder whose loop iteration count depends on the bitlength of the secret. This issue affects only key generation, not ECDSA signatures or ECDH key agreement.",
  "id": "GHSA-g9j4-hp3j-g668",
  "modified": "2024-04-04T03:07:05Z",
  "published": "2022-05-24T22:01:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-20187"
    },
    {
      "type": "WEB",
      "url": "https://botan.randombit.net/news.html"
    },
    {
      "type": "WEB",
      "url": "https://botan.randombit.net/security.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/crocs-muni/ECTester"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2018-20187 (GCVE-0-2018-20187)

Vulnerability from cvelistv5 – Published: 2019-03-08 19:00 – Updated: 2024-08-05 11:58

Summary

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://github.com/crocs-muni/ECTester	x_refsource_MISC
	https://botan.randombit.net/news.html	x_refsource_MISC
	https://botan.randombit.net/security.html	x_refsource_MISC

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            "url": "https://botan.randombit.net/security.html"
          }
        ],
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      }
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Sightings

Author	Source	Type	Date

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

GHSA-G9J4-HP3J-G668

CVE-2018-20187 (GCVE-0-2018-20187)

Tags

Sightings

Nomenclature