# CVE-2020-27583: Deserialization in n/a

> Remote unauthenticated attackers can execute arbitrary code via deserialization of untrusted data in IBM InfoSphere Information Server.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Jan 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-wffw-394c-6775

## What is CVE-2020-27583?

CVE-2020-27583 is a critical unsafe deserialization vulnerability in Ibm Infosphere Information Server, published on 21 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

IBM InfoSphere Information Server 8.5.0.0 is affected by deserialization of untrusted data which could allow remote unauthenticated attackers to execute arbitrary code. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2020-27583?

It affects 1 product.


Products: Ibm Infosphere Information Server.

## How do I fix CVE-2020-27583?

No fix has been published for CVE-2020-27583 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-27583 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-27583 exists.

## Other vulnerabilities in Ibm Infosphere Information Server

- [CVE-2009-4240](https://insights.sbomify.com/CVE-2009-4240/): Memory corruption in n/a (critical 10.0)
- [CVE-2022-40752](https://insights.sbomify.com/CVE-2022-40752/): Command injection in InfoSphere DataStage (critical 9.8)
- [CVE-2022-22425](https://insights.sbomify.com/CVE-2022-22425/): Code injection in IBM InfoSphere Information Server (critical 9.8)
- [CVE-2022-40747](https://insights.sbomify.com/CVE-2022-40747/): XML external entity in IBM InfoSphere Information Server (critical 9.1)
- [CVE-2017-1383](https://insights.sbomify.com/CVE-2017-1383/): XML external entity in InfoSphere Information Server (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-27583 and fix it if it is affected.

What it is: CVE-2020-27583 is a critical unsafe deserialization vulnerability in Ibm Infosphere Information Server, published on 21 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-27583 exists.

Affected product: Ibm Infosphere Information Server. 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-2020-27583/ (Markdown: https://insights.sbomify.com/CVE-2020-27583/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-27583
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-27583
- OSV: https://osv.dev/vulnerability/CVE-2020-27583

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-27583/
Summaries are generated and may contain mistakes; the official description above is the record.