Vulnerability in Bouncycastle Bc-Java
CVE-2016-1000340
In the Bouncy Castle JCE Provider versions 1.51 to 1.55, a carry propagation bug was introduced in the implementation of squaring for several raw math classes have been fixed (org.bouncycastle.math.raw.Nat???). These classes are used by our custom elliptic curve implementations (org.bouncycastle.math.ec.custom.**), so there was the possibility of rare (in general usage) spurious calculations for elliptic curve scalar multiplications. Such errors would have been detected with high probability by the output validation for our scalar multipliers.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.023 (82.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2018:2669 (vendor-advisory)
- access.redhat.com/errata/RHSA-2018:2927 (vendor-advisory)
- www.oracle.com/security-alerts/cpuoct2020.html
- security.netapp.com/advisory/ntap-20181127-0004/
- github.com/bcgit/bc-java/commit/790642084c4e0cadd47352054f868cc8397e2c00 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-1000340?
- CVE-2016-1000340 is a high-severity vulnerability in Bouncycastle Bc-Java, classified under CWE-19. CVSS score: 7.5/10. Published 2018-06-04.
- How severe is CVE-2016-1000340?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-1000340 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.