The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrict_anonymous_to_tgt is enabled, uses an incorrect client data structure, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an S4U2Self request.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | alpine-linux-upgrade-krb5 | Aug 30, 2017 | Aug 1, 2016 | |
| Amazon_linux | — | amazon-linux-upgrade-krb5 | Feb 7, 2017 | Jul 31, 2016 |
| Debian | debian-upgrade-krb5 | Feb 20, 2019 | Jul 31, 2016 | |
| Freebsd | freebsd-upgrade-package-krb5-113freebsd-upgrade-package-krb5-114 | Dec 10, 2025 | Jul 21, 2016 | |
| Huawei Euleros 2_0_sp1 | huawei-euleros-2_0_sp1-upgrade-krb5-develhuawei-euleros-2_0_sp1-upgrade-krb5-libshuawei-euleros-2_0_sp1-upgrade-krb5-pkinithuawei-euleros-2_0_sp1-upgrade-krb5-serverhuawei-euleros-2_0_sp1-upgrade-krb5-server-ldaphuawei-euleros-2_0_sp1-upgrade-krb5-workstation | Nov 30, 2017 | Jul 31, 2016 | |
| Oracle Solaris | oracle-solaris-11-3-upgrade-security-kerberos-5-1-14-4-0-0-175-3-21-0-2-0oracle-solaris-11-3-upgrade-security-kerberos-5-kdc-1-14-4-0-0-175-3-21-0-2-0 | Jun 20, 2017 | Jul 31, 2016 | |
| Oracle_linux | — | oracle-linux-upgrade-krb5-develoracle-linux-upgrade-krb5-libsoracle-linux-upgrade-krb5-pkinitoracle-linux-upgrade-krb5-serveroracle-linux-upgrade-krb5-server-ldaporacle-linux-upgrade-krb5-workstationoracle-linux-upgrade-libkadm5 | Nov 9, 2016 | Jul 19, 2016 |
| Redhat_linux | — | redhat-upgrade-krb5-debuginforedhat-upgrade-krb5-develredhat-upgrade-krb5-libsredhat-upgrade-krb5-pkinitredhat-upgrade-krb5-serverredhat-upgrade-krb5-server-ldapredhat-upgrade-krb5-workstationredhat-upgrade-libkadm5 | Nov 4, 2016 | Jul 31, 2016 |
| Suse | — | suse-upgrade-krb5suse-upgrade-krb5-32bitsuse-upgrade-krb5-clientsuse-upgrade-krb5-develsuse-upgrade-krb5-docsuse-upgrade-krb5-plugin-kdb-ldapsuse-upgrade-krb5-plugin-preauth-otpsuse-upgrade-krb5-plugin-preauth-pkinitsuse-upgrade-krb5-server | Aug 26, 2016 | Jul 31, 2016 |
| Ubuntu | ubuntu-upgrade-krb5 | Nov 19, 2024 | Aug 1, 2016 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub