High · published December 25, 2022
PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has "a similar bug."
| Product | Versions | Fixed in |
|---|---|---|
| mit/kerberos_5 | ≥ 1.8, < 1.19.4 | 1.19.4 |
| mit/kerberos_5 | all versions | — |
| mit/kerberos_5 | all versions | — |
| heimdal_project/heimdal | < 7.7.1 | 7.7.1 |
| samba/samba | < 4.15.12 | 4.15.12 |
| samba/samba | ≥ 4.16.0, < 4.16.7 | 4.16.7 |
| samba/samba | ≥ 4.17.0, < 4.17.3 | 4.17.3 |