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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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade krb5 | Jan 10, 2019 | Dec 26, 2018 |
| Amazon_linux | — | Upgrade krb5 | Jun 4, 2020 | Dec 26, 2018 |
| Debian | — | Upgrade krb5 | Feb 20, 2019 | Dec 26, 2018 |
| Huawei Euleros 2_0_sp2 | — | Upgrade krb5-workstationUpgrade krb5-develUpgrade krb5-serverUpgrade krb5-server-ldapUpgrade krb5-pkinitUpgrade libkadm5Upgrade krb5-libs | Dec 4, 2019 | Dec 26, 2018 |
| Huawei Euleros 2_0_sp3 | — | Upgrade krb5-workstationUpgrade krb5-serverUpgrade krb5-pkinitUpgrade krb5-develUpgrade libkadm5Upgrade krb5-server-ldapUpgrade krb5-libs | Dec 18, 2019 | Dec 26, 2018 |
| Huawei Euleros 2_0_sp5 | — | Upgrade krb5-libsUpgrade krb5-pkinitUpgrade libkadm5Upgrade krb5-workstationUpgrade krb5-server-ldapUpgrade krb5-serverUpgrade krb5-devel | Dec 11, 2019 | Dec 26, 2018 |
| Oracle Solaris | — | Upgrade security/kerberos-5 to version 1.16.1.0-11.4.6.0.1.1.0 on Solaris 11.4Upgrade security/kerberos-5/kdc to version 1.16.1.0-11.4.6.0.1.1.0 on Solaris 11.4 | Feb 20, 2019 | Dec 26, 2018 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Dec 26, 2018 |
| Suse | — | Upgrade krb5-serverUpgrade krb5-mini-develUpgrade krb5-miniUpgrade krb5-plugin-preauth-pkinitUpgrade krb5-plugin-kdb-ldapUpgrade krb5-develUpgrade krb5Upgrade krb5-devel-32bitUpgrade krb5-32bitUpgrade krb5-plugin-preauth-otpUpgrade krb5-docUpgrade krb5-client | Jan 18, 2019 | Dec 26, 2018 |
| Ubuntu | — | Upgrade krb5-user (Ubuntu Pro)Upgrade libkdb5-9Upgrade krb5-admin-serverUpgrade krb5-kdc (Ubuntu Pro)Upgrade libkdb5-8 (Ubuntu Pro)Upgrade libgssapi-krb5-2 (Ubuntu Pro)Upgrade krb5-admin-server (Ubuntu Pro)Upgrade krb5-userUpgrade krb5-kdcUpgrade libgssapi-krb5-2 | Mar 22, 2023 | Dec 26, 2018 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Dec 26, 2018 |
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