# ALBA-2021:1083: idm:DL1 bug fix update

> A double-free vulnerability in the Kerberos KDC can cause the Identity Management server to crash, resulting in a denial of service.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 6 Apr 2021

## What is ALBA-2021:1083?

ALBA-2021:1083 is an use after free vulnerability in custodia, published on 6 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

AlmaLinux Identity Management (IdM) is a centralized authentication, identity management, and authorization solution for both traditional and cloud-based enterprise environments.

Bug Fix(es):

* IPA krb5kdc crash possible doublefree ipadb_mspac_struct_free finish_process_as_req (BZ#1930562)

* krb5kdc is crashing intermittently on IPA server (BZ#1935146)

## Which versions are affected by ALBA-2021:1083?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `custodia` | AlmaLinux:8 | All versions | 0.6.0-3.module_el8.5.0+2603+92118e57 |
| `custodia` | AlmaLinux:8 | All versions | 0.6.0-3.module_el8.6.0+2881+2f24dc92 |
| `python3-custodia` | AlmaLinux:8 | All versions | 0.6.0-3.module_el8.5.0+2603+92118e57 |
| `python3-custodia` | AlmaLinux:8 | All versions | 0.6.0-3.module_el8.6.0+2881+2f24dc92 |
| `python3-jwcrypto` | AlmaLinux:8 | All versions | 0.5.0-1.module_el8.5.0+2603+92118e57 |
| `python3-jwcrypto` | AlmaLinux:8 | All versions | 0.5.0-1.module_el8.6.0+2737+7e73ea90 |
| `python3-jwcrypto` | AlmaLinux:8 | All versions | 0.5.0-1.module_el8.6.0+2881+2f24dc92 |
| `python3-kdcproxy` | AlmaLinux:8 | All versions | 0.4-5.module_el8.5.0+2603+92118e57 |
| `python3-kdcproxy` | AlmaLinux:8 | All versions | 0.4-5.module_el8.6.0+2881+2f24dc92 |
| `python3-pyusb` | AlmaLinux:8 | All versions | 1.0.0-9.module_el8.5.0+2603+92118e57 |
| `python3-pyusb` | AlmaLinux:8 | All versions | 1.0.0-9.module_el8.6.0+2737+7e73ea90 |
| `python3-pyusb` | AlmaLinux:8 | All versions | 1.0.0-9.module_el8.6.0+2881+2f24dc92 |
| `python3-qrcode` | AlmaLinux:8 | All versions | 5.1-12.module_el8.5.0+2603+92118e57 |
| `python3-qrcode` | AlmaLinux:8 | All versions | 5.1-12.module_el8.6.0+2737+7e73ea90 |
| `python3-qrcode` | AlmaLinux:8 | All versions | 5.1-12.module_el8.6.0+2881+2f24dc92 |
| `python3-qrcode-core` | AlmaLinux:8 | All versions | 5.1-12.module_el8.5.0+2603+92118e57 |
| `python3-qrcode-core` | AlmaLinux:8 | All versions | 5.1-12.module_el8.6.0+2737+7e73ea90 |
| `python3-qrcode-core` | AlmaLinux:8 | All versions | 5.1-12.module_el8.6.0+2881+2f24dc92 |
| `python3-yubico` | AlmaLinux:8 | All versions | 1.3.2-9.module_el8.5.0+2603+92118e57 |
| `python3-yubico` | AlmaLinux:8 | All versions | 1.3.2-9.module_el8.6.0+2737+7e73ea90 |
| `python3-yubico` | AlmaLinux:8 | All versions | 1.3.2-9.module_el8.6.0+2881+2f24dc92 |

## How do I fix ALBA-2021:1083?

Apply the vendor's patch.

## Is ALBA-2021:1083 being exploited?

There is no known exploitation of ALBA-2021:1083 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for ALBA-2021:1083 and fix it if it is affected.

What it is: ALBA-2021:1083 is an use after free vulnerability in custodia, published on 6 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of ALBA-2021:1083 in the wild and no public exploit code.

Affected product: custodia. 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/ALBA-2021-1083/ (Markdown: https://insights.sbomify.com/ALBA-2021-1083/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/ALBA-2021:1083

---
From sbomify Insights: https://insights.sbomify.com/ALBA-2021-1083/
Summaries are generated and may contain mistakes; the official description above is the record.