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FKIE_CVE-2016-2849

Vulnerability from fkie_nvd - Published: 2016-05-13 14:59 - Updated: 2026-06-17 00:44
Severity
7.5 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
Botan before 1.10.13 and 1.11.x before 1.11.29 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret keys via a timing side-channel attack.
References
cve@mitre.orghttp://botan.randombit.net/security.htmlVendor Advisory
cve@mitre.orghttp://lists.fedoraproject.org/pipermail/package-announce/2016-May/183669.html
cve@mitre.orghttp://marc.info/?l=botan-devel&m=146185420505943&w=2Vendor Advisory
cve@mitre.orghttp://www.debian.org/security/2016/dsa-3565
cve@mitre.orghttps://security.gentoo.org/glsa/201701-23
af854a3a-2127-422b-91ae-364da2661108http://botan.randombit.net/security.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183669.html
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=botan-devel&m=146185420505943&w=2Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2016/dsa-3565
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/201701-23
Impacted products
Vendor Product Version
debian debian_linux 8.0
fedoraproject fedora 24
botan_project botan 1.10.12
botan_project botan 1.11.0
botan_project botan 1.11.1
botan_project botan 1.11.2
botan_project botan 1.11.3
botan_project botan 1.11.4
botan_project botan 1.11.5
botan_project botan 1.11.6
botan_project botan 1.11.7
botan_project botan 1.11.8
botan_project botan 1.11.9
botan_project botan 1.11.10
botan_project botan 1.11.11
botan_project botan 1.11.12
botan_project botan 1.11.13
botan_project botan 1.11.14
botan_project botan 1.11.15
botan_project botan 1.11.16
botan_project botan 1.11.17
botan_project botan 1.11.18
botan_project botan 1.11.19
botan_project botan 1.11.20
botan_project botan 1.11.21
botan_project botan 1.11.22
botan_project botan 1.11.23
botan_project botan 1.11.24
botan_project botan 1.11.25
botan_project botan 1.11.26
botan_project botan 1.11.27
botan_project botan 1.11.28
To clipboard 

{
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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "Botan before 1.10.13 and 1.11.x before 1.11.29 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret keys via a timing side-channel attack."
    },
    {
      "lang": "es",
      "value": "Botan en versiones anteriores a 1.10.13 y 1.11.x en versiones anteriores a 1.11.29 no utiliza un algoritmo de tiempo constante para realizar un inverso modular en la firma k nonce, lo que podr\u00eda permitir a atacantes remotos obtener claves secretas ECDSA a trav\u00e9s de un ataque de sincronizaci\u00f3n de canal lateral."
    }
  ],
  "id": "CVE-2016-2849",
  "lastModified": "2026-06-17T00:44:35.343",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": true,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
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        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.0"
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        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  },
  "published": "2016-05-13T14:59:10.713",
  "references": [
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      "source": "cve@mitre.org",
      "tags": [
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      "url": "http://botan.randombit.net/security.html"
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.