# CVE-2023-33855: IBM Common Cryptographic Architecture information disclosure

> Remote attackers can exploit timing side-channels in RSA operations to obtain sensitive information from IBM Common Cryptographic Architecture.

- **Severity:** Low 3.7 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Mar 2024
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-wwrv-f6v4-m66r

## What is CVE-2023-33855?

CVE-2023-33855 is a low-severity vulnerability in IBM Common Cryptographic Architecture, published on 26 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Under certain conditions, RSA operations performed by IBM Common Cryptographic Architecture (CCA) 7.0.0 through 7.5.36 may exhibit non-constant-time behavior.  This could allow a remote attacker to obtain sensitive information using a timing-based attack.  IBM X-Force ID:  257676.

Weakness: CWE-385 (Covert Timing Channel)

## Which versions are affected by CVE-2023-33855?

It affects 1 product.


Products: Ibm Common Cryptographic Architecture.

## How do I fix CVE-2023-33855?

No fix has been published for CVE-2023-33855 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-33855 being exploited?

There is no known exploitation of CVE-2023-33855 in the wild and no public exploit code.

## Other vulnerabilities in IBM Common Cryptographic Architecture

- [CVE-2023-47150](https://insights.sbomify.com/CVE-2023-47150/): IBM Common Cryptographic Architecture denial of service (high 7.5)
- [CVE-2024-22340](https://insights.sbomify.com/CVE-2024-22340/): IBM Common Cryptographic Architecture information disclosure (medium 6.5)
- [CVE-2024-49823](https://insights.sbomify.com/CVE-2024-49823/): IBM Common Cryptographic Architecture denial of service (medium 6.5)
- [CVE-2022-22423](https://insights.sbomify.com/CVE-2022-22423/): Denial of service in CCA for MTM 4767 (medium 6.5)
- [CVE-2024-41760](https://insights.sbomify.com/CVE-2024-41760/): IBM Common Cryptographic Architecture information disclosure (low 3.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-33855 and fix it if it is affected.

What it is: CVE-2023-33855 is a low-severity vulnerability in IBM Common Cryptographic Architecture, published on 26 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-33855 in the wild and no public exploit code.

Affected product: IBM Common Cryptographic Architecture. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-33855/ (Markdown: https://insights.sbomify.com/CVE-2023-33855/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-33855
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-33855
- OSV: https://osv.dev/vulnerability/CVE-2023-33855

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-33855/
Summaries are generated and may contain mistakes; the official description above is the record.