libkdb5-9: A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 (aka krb5) before 1.17
CVE-2018-20217 is fixed in 20 products on 1 platform, first by krb5-admin-server 1.16-2ubuntu0.3, released December 24, 2022. It is not reported as exploited. Patch Radar priority: Routine.
A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 (aka krb5) before 1.17. If an attacker can obtain a krbtgt ticket using an older encryption type (single-DES, triple-DES, or RC4), the attacker can crash the KDC by making an S4U2Self request.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| krb5-admin-server · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | krb5-admin-server 1.16-2ubuntu0.3 | Dec 24, 2022 |
| krb5-gss-samples · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | krb5-gss-samples 1.16-2ubuntu0.3 | Dec 24, 2022 |
| krb5-k5tls · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | krb5-k5tls 1.16-2ubuntu0.3 | Dec 24, 2022 |
| krb5-kdc · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | krb5-kdc 1.16-2ubuntu0.3 | Dec 24, 2022 |
| krb5-kdc-ldap · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | krb5-kdc-ldap 1.16-2ubuntu0.3 | Dec 24, 2022 |
| krb5-kpropd · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | krb5-kpropd 1.16-2ubuntu0.3 | Dec 24, 2022 |
| krb5-locales · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | krb5-locales 1.16-2ubuntu0.3 | Dec 24, 2022 |
| krb5-multidev · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | krb5-multidev 1.16-2ubuntu0.3 | Dec 24, 2022 |
| krb5-otp · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | krb5-otp 1.16-2ubuntu0.3 | Dec 24, 2022 |
| krb5-pkinit · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | krb5-pkinit 1.16-2ubuntu0.3 | Dec 24, 2022 |
| krb5-user · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | krb5-user 1.16-2ubuntu0.3 | Dec 24, 2022 |
| libgssapi-krb5-2 · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | libgssapi-krb5-2 1.16-2ubuntu0.3 | Dec 24, 2022 |
| libgssrpc4 · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | libgssrpc4 1.16-2ubuntu0.3 | Dec 24, 2022 |
| libk5crypto3 · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | libk5crypto3 1.16-2ubuntu0.3 | Dec 24, 2022 |
| libkadm5clnt-mit11 · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | libkadm5clnt-mit11 1.16-2ubuntu0.3 | Dec 24, 2022 |
| libkadm5srv-mit11 · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | libkadm5srv-mit11 1.16-2ubuntu0.3 | Dec 24, 2022 |
| libkdb5-9 · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | libkdb5-9 1.16-2ubuntu0.3 | Dec 24, 2022 |
| libkrad0 · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | libkrad0 1.16-2ubuntu0.3 | Dec 24, 2022 |
| libkrb5-3 · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | libkrb5-3 1.16-2ubuntu0.3 | Dec 24, 2022 |
| libkrb5support0 · Ubuntu 18.04.6 LTS (bionic) | 1.16-2ubuntu0.3 | libkrb5support0 1.16-2ubuntu0.3 | Dec 24, 2022 |
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