# CVE-2021-20573: Memory corruption in Security Identity Manager Adapters

> A remote authenticated attacker can trigger a heap-based buffer overflow in IBM Security Identity Manager Adapters, causing the server to crash.

- **Severity:** Medium 6.5 (`CVSS:3.0/UI:N/AC:L/AV:N/C:N/I:N/S:U/PR:L/A:H/RC:C/E:U/RL:O`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Jun 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-mj6m-vx49-4m89

## What is CVE-2021-20573?

CVE-2021-20573 is a medium-severity memory corruption vulnerability in IBM Security Identity Manager Adapters, published on 28 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

IBM Security Identity Manager Adapters 6.0 and 7.0 are vulnerable to a heap-based buffer overflow, caused by improper bounds checking. A remote authenticated attacker could overflow the and cause the server to crash. IBM X-Force ID: 199249.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2021-20573?

It affects 1 product.


Products: Ibm Security Identity Manager Adapter.

## How do I fix CVE-2021-20573?

No fix has been published for CVE-2021-20573 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-20573 being exploited?

There is no known exploitation of CVE-2021-20573 in the wild and no public exploit code.

## Other vulnerabilities in IBM Security Identity Manager Adapters

- [CVE-2021-20574](https://insights.sbomify.com/CVE-2021-20574/): Other in Security Identity Manager Adapters (high 7.5)
- [CVE-2016-0340](https://insights.sbomify.com/CVE-2016-0340/): Auth bypass in n/a (high 7.4)
- [CVE-2016-0330](https://insights.sbomify.com/CVE-2016-0330/): Weak cryptography in n/a (high 7.3)
- [CVE-2021-20494](https://insights.sbomify.com/CVE-2021-20494/): Memory corruption in Security Identity Manager Adapters (medium 6.5)
- [CVE-2021-20572](https://insights.sbomify.com/CVE-2021-20572/): Memory corruption in Security Identity Manager Adapters (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-20573 and fix it if it is affected.

What it is: CVE-2021-20573 is a medium-severity memory corruption vulnerability in IBM Security Identity Manager Adapters, published on 28 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-20573 in the wild and no public exploit code.

Affected product: IBM Security Identity Manager Adapters. 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-2021-20573/ (Markdown: https://insights.sbomify.com/CVE-2021-20573/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-20573
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-20573
- OSV: https://osv.dev/vulnerability/CVE-2021-20573

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-20573/
Summaries are generated and may contain mistakes; the official description above is the record.