The Bouncy Castle Java library before 1.51 does not validate a point is withing the elliptic curve, which makes it easier for remote…

Description

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."

Scores

EPSS (exploitation in 30 days)

4.7% · top 8.2% of all CVEs (3 Nov 2026)

Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.

Weakness

• n/a
• CWE-200 (opens in a new tab)Other CVEs with CWE-200
• CWE-310 (opens in a new tab)Other CVEs with CWE-310

Affected products

• n/a

  • affected n/a

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• Mavenorg.bouncycastle:bcprov-jdk14GHSA-4mv7-cq75-3qjm (opens in a new tab)
• Mavenorg.bouncycastle:bcprov-jdk15GHSA-4mv7-cq75-3qjm (opens in a new tab)
• Mavenorg.bouncycastle:bcprov-jdk15onGHSA-4mv7-cq75-3qjm (opens in a new tab)

References (21)

• RHSA-2016:2035 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• 79091 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• openSUSE-SU-2015:1911 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• FEDORA-2015-7d95466eda (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• RHSA-2016:2036 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• USN-3727-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• [oss-security] 20151022 Re: CVE Request: invalid curve attack on bouncycastle (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• 1037036 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• [oss-security] 20151022 CVE Request: invalid curve attack on bouncycastle (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• DSA-3417 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://web-in-security.blogspot.ca/2015/09/practical-invalid-curve-attacks.html (opens in a new tab)x_refsource_MISCx_transferred
• 1037046 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• 1037053 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• https://www.oracle.com/security-alerts/cpuapr2020.html (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-4mv7-cq75-3qjm (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2015-7940](https://trackcve.app/badge/CVE-2015-7940.svg)](https://trackcve.app/cve/CVE-2015-7940)

Record last updated 6 Aug 2024, 08:06 UTC.