Vulnerability-Lookup

CVE-2015-7940 (GCVE-0-2015-7940)

Vulnerability from cvelistv5 – Published: 2015-11-09 16:00 – Updated: 2024-08-06 08:06

Summary

The Bouncy Castle Java library before 1.51 does not validate a point is withing the elliptic curve, which makes it easier for remote attackers to obtain private keys via a series of crafted elliptic curve Diffie Hellman (ECDH) key exchanges, aka an "invalid curve attack."

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

21 references

URL	Tags
http://rhn.redhat.com/errata/RHSA-2016-2035.html	vendor-advisoryx_refsource_REDHAT
http://www.oracle.com/technetwork/security-adviso…	x_refsource_CONFIRM
http://www.oracle.com/technetwork/security-adviso…	x_refsource_CONFIRM
https://www.oracle.com/technetwork/security-advis…	x_refsource_CONFIRM
http://www.securityfocus.com/bid/79091	vdb-entryx_refsource_BID
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
http://lists.fedoraproject.org/pipermail/package-…	vendor-advisoryx_refsource_FEDORA
http://www.oracle.com/technetwork/security-adviso…	x_refsource_CONFIRM
http://rhn.redhat.com/errata/RHSA-2016-2036.html	vendor-advisoryx_refsource_REDHAT
http://www.oracle.com/technetwork/security-adviso…	x_refsource_CONFIRM
https://usn.ubuntu.com/3727-1/	vendor-advisoryx_refsource_UBUNTU
http://www.openwall.com/lists/oss-security/2015/10/22/9	mailing-listx_refsource_MLIST
http://www.oracle.com/technetwork/security-adviso…	x_refsource_CONFIRM
http://www.securitytracker.com/id/1037036	vdb-entryx_refsource_SECTRACK
http://www.openwall.com/lists/oss-security/2015/10/22/7	mailing-listx_refsource_MLIST
http://www.debian.org/security/2015/dsa-3417	vendor-advisoryx_refsource_DEBIAN
http://www.oracle.com/technetwork/security-adviso…	x_refsource_CONFIRM
http://web-in-security.blogspot.ca/2015/09/practi…	x_refsource_MISC
http://www.securitytracker.com/id/1037046	vdb-entryx_refsource_SECTRACK
http://www.securitytracker.com/id/1037053	vdb-entryx_refsource_SECTRACK
https://www.oracle.com/security-alerts/cpuapr2020.html	x_refsource_MISC

Date Public

2015-09-15 00:00

Show details on NVD website

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      "id": "CVE-2015-7940",
      "lastModified": "2024-11-21T02:37:42.203",
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      "published": "2015-11-09T16:59:09.277",
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      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T12:13:36+00:00",
      "cve": "CVE-2015-7940",
      "id": "CVE-2015-7940",
      "initial_release_date": "2015-09-14T00:00:00+00:00",
      "product_status:fixed": "2",
      "product_status:known_affected": "4",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "bouncycastle: Invalid curve attack allowing to extract private keys",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2015/cve-2015-7940.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-23T00:38:53Z",
      "cve": "CVE-2015-7940",
      "id": "CVE-2015-7940",
      "initial_release_date": "2023-02-15T05:13:06Z",
      "product_status:recommended": "138",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2015-7940",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2015-7940.json",
      "version": "12"
    }
  }
}

RHSA-2016:2036

Vulnerability from csaf_redhat - Published: 2016-10-06 16:18 - Updated: 2026-06-27 08:59

Summary

Red Hat Security Advisory: Red Hat JBoss A-MQ 6.3 security update

Severity

Important

Scope

5 vulnerabilities in this advisory, including CVE-2015-7940.

CVE-2015-7940

It was found that bouncycastle is vulnerable to an invalid curve attack. An attacker could extract private keys used in elliptic curve cryptography with a few thousand queries.

3.7 (Low)


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

Fixed: 1 product

https://access.redhat.com/errata/RHSA-2016:2036

Open the full advisory

RHSA-2016_2035

Vulnerability from csaf_redhat - Published: 2016-10-06 16:18 - Updated: 2024-11-22 10:24

Summary

Red Hat Security Advisory: Red Hat JBoss Fuse 6.3 security update

Severity

Important

Scope

8 vulnerabilities in this advisory, including CVE-2015-7940.

CVE-2015-7940

It was found that bouncycastle is vulnerable to an invalid curve attack. An attacker could extract private keys used in elliptic curve cryptography with a few thousand queries.

3.7 (Low)


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

Fixed: 1 product

https://access.redhat.com/errata/RHSA-2016:2035

Open the full advisory

RHSA-2016_2036

Vulnerability from csaf_redhat - Published: 2016-10-06 16:18 - Updated: 2024-11-22 10:24

Summary

Red Hat Security Advisory: Red Hat JBoss A-MQ 6.3 security update

Severity

Important

Scope

5 vulnerabilities in this advisory, including CVE-2015-7940.

CVE-2015-7940

It was found that bouncycastle is vulnerable to an invalid curve attack. An attacker could extract private keys used in elliptic curve cryptography with a few thousand queries.

3.7 (Low)


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

Fixed: 1 product

https://access.redhat.com/errata/RHSA-2016:2036

Open the full advisory

ubuntu-cve-2015-7940

Vulnerability from osv_ubuntu

Published

2015-11-09 00:00

Modified

2025-09-08 16:43

Summary

Details

Severity

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2015-7940	REPORT
	https://web-in-security.blogspot.ca/2015/09/pract…	REPORT
	https://ubuntu.com/security/notices/USN-3727-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2015-7940	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libbcmail-java",
            "binary_version": "1.49+dfsg-2ubuntu0.1"
          },
          {
            "binary_name": "libbcpg-java",
            "binary_version": "1.49+dfsg-2ubuntu0.1"
          },
          {
            "binary_name": "libbcpkix-java",
            "binary_version": "1.49+dfsg-2ubuntu0.1"
          },
          {
            "binary_name": "libbcprov-java",
            "binary_version": "1.49+dfsg-2ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "bouncycastle",
        "purl": "pkg:deb/ubuntu/bouncycastle@1.49+dfsg-2ubuntu0.1?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.49+dfsg-2ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.48+dfsg-2",
        "1.49+dfsg-2"
      ]
    }
  ],
  "aliases": [],
  "details": "The Bouncy Castle Java library before 1.51 does not validate a point is withing the elliptic curve, which makes it easier for remote attackers to obtain private keys via a series of crafted elliptic curve Diffie Hellman (ECDH) key exchanges, aka an \"invalid curve attack.\"",
  "id": "UBUNTU-CVE-2015-7940",
  "modified": "2025-09-08T16:43:29Z",
  "published": "2015-11-09T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2015-7940"
    },
    {
      "type": "REPORT",
      "url": "https://web-in-security.blogspot.ca/2015/09/practical-invalid-curve-attacks.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3727-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2015-7940"
    }
  ],
  "related": [
    "USN-3727-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2015-7940"
  ]
}

WID-SEC-W-2022-1375

Vulnerability from csaf_certbund - Published: 2022-09-11 22:00 - Updated: 2025-10-12 22:00

Summary

JFrog Artifactory: Mehrere Schwachstellen

Severity

Hoch

Scope

99 vulnerabilities in this advisory, including CVE-2015-7940.

CVE-2015-7940

Known affected: 5 products

Open the full advisory

WID-SEC-W-2024-3616

Vulnerability from csaf_certbund - Published: 2016-10-06 22:00 - Updated: 2024-12-05 23:00

Summary

Red Hat JBoss Fuse: Mehrere Schwachstellen

Severity

Mittel

Scope

7 vulnerabilities in this advisory, including CVE-2015-7940.

CVE-2015-7940

Es existiert eine Schwachstelle in Red Hat JBoss Fuse und Red Hat JBoss A-MQ in der Komponente "bouncycastle". Die Schwachstelle beruht darauf, dass ein Angreifer private Schlüssel bei Verwendung von elliptischen Kurven in der Kryptographie auslesen kann.

Known affected: 3 products

Open the full advisory

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.

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.

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.

Action not permitted

CVE-2015-7940 (GCVE-0-2015-7940)

RHSA-2016:2036

RHSA-2016_2035

RHSA-2016_2036

ubuntu-cve-2015-7940

Vulnerability from osv_ubuntu

WID-SEC-W-2022-1375

WID-SEC-W-2024-3616

Tags

Sightings

Nomenclature

Related by attack behaviour