# CVE-2022-44640: libgssapi3-heimdal: Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the ASN.1 codec...

CVE-2022-44640 is fixed in 24 products on 1 platform, first by DEBIAN-CVE-2022-44640, released December 25, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-44640
- Priority: High
- CVSS: 9.8 (Medium)
- EPSS: 0.0235
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 24, 2022

## Description

Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the ASN.1 codec used by the Key Distribution Center (KDC).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | heimdal Debian 12.15 (bookworm) | 7.8.git20221115.a6cf945+dfsg-1 | [DEBIAN-CVE-2022-44640](https://patchblox.com/security/data/fix/linux/debian-cve-2022-44640.md) | Dec 25, 2022 |
| Linux | heimdal Debian 13.5 (trixie) | 7.8.git20221115.a6cf945+dfsg-1 | [DEBIAN-CVE-2022-44640](https://patchblox.com/security/data/fix/linux/debian-cve-2022-44640.md) | Dec 25, 2022 |
| Linux | heimdal Debian 14 | 7.8.git20221115.a6cf945+dfsg-1 | [DEBIAN-CVE-2022-44640](https://patchblox.com/security/data/fix/linux/debian-cve-2022-44640.md) | Dec 25, 2022 |
| Linux | heimdal-clients Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [heimdal-clients 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-heimdal-clients-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | heimdal-clients Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [heimdal-clients 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-heimdal-clients-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | heimdal-docs Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [heimdal-docs 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-heimdal-docs-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | heimdal-docs Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [heimdal-docs 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-heimdal-docs-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | heimdal-kcm Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [heimdal-kcm 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-heimdal-kcm-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | heimdal-kcm Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [heimdal-kcm 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-heimdal-kcm-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | heimdal-kdc Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [heimdal-kdc 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-heimdal-kdc-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | heimdal-kdc Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [heimdal-kdc 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-heimdal-kdc-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | heimdal-multidev Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [heimdal-multidev 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-heimdal-multidev-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | heimdal-multidev Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [heimdal-multidev 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-heimdal-multidev-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | heimdal-servers Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [heimdal-servers 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-heimdal-servers-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | heimdal-servers Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [heimdal-servers 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-heimdal-servers-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libasn1-8-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libasn1-8-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libasn1-8-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libasn1-8-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libasn1-8-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libasn1-8-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libgssapi3-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libgssapi3-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgssapi3-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libgssapi3-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libgssapi3-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgssapi3-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libhcrypto4-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libhcrypto4-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libhcrypto4-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libhcrypto4-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libhcrypto4-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libhcrypto4-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libhdb9-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libhdb9-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libhdb9-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libhdb9-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libhdb9-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libhdb9-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libheimbase1-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libheimbase1-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libheimbase1-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libheimbase1-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libheimbase1-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libheimbase1-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libheimntlm0-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libheimntlm0-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libheimntlm0-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libheimntlm0-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libheimntlm0-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libheimntlm0-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libhx509-5-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libhx509-5-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libhx509-5-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libhx509-5-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libhx509-5-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libhx509-5-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libkadm5clnt7-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libkadm5clnt7-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libkadm5clnt7-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libkadm5clnt7-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libkadm5clnt7-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libkadm5clnt7-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libkadm5srv8-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libkadm5srv8-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libkadm5srv8-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libkadm5srv8-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libkadm5srv8-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libkadm5srv8-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libkafs0-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libkafs0-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libkafs0-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libkafs0-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libkafs0-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libkafs0-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libkdc2-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libkdc2-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libkdc2-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libkdc2-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libkdc2-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libkdc2-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libkrb5-26-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libkrb5-26-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libkrb5-26-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libkrb5-26-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libkrb5-26-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libkrb5-26-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libotp0-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libotp0-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libotp0-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libotp0-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libotp0-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libotp0-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libroken18-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libroken18-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libroken18-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libroken18-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libroken18-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libroken18-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libsl0-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libsl0-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libsl0-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libsl0-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libsl0-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libsl0-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | libwind0-heimdal Ubuntu 18.04.6 LTS (bionic) | 7.5.0+dfsg-1ubuntu0.3 | [libwind0-heimdal 7.5.0+dfsg-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwind0-heimdal-7.5.0-dfsg-1ubuntu0.3.md) | Dec 25, 2022 |
| Linux | libwind0-heimdal Ubuntu 20.04 LTS (focal) | 7.7.0+dfsg-1ubuntu1.3 | [libwind0-heimdal 7.7.0+dfsg-1ubuntu1.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libwind0-heimdal-7.7.0-dfsg-1ubuntu1.3.md) | Dec 25, 2022 |
| Linux | samba Debian 12.15 (bookworm) | 2:4.17.4+dfsg-1 | [DEBIAN-CVE-2022-44640](https://patchblox.com/security/data/fix/linux/debian-cve-2022-44640.md) | Dec 25, 2022 |
| Linux | samba Debian 13.5 (trixie) | 2:4.17.4+dfsg-1 | [DEBIAN-CVE-2022-44640](https://patchblox.com/security/data/fix/linux/debian-cve-2022-44640.md) | Dec 25, 2022 |
| Linux | samba Debian 14 | 2:4.17.4+dfsg-1 | [DEBIAN-CVE-2022-44640](https://patchblox.com/security/data/fix/linux/debian-cve-2022-44640.md) | Dec 25, 2022 |

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