The krb5_ldap_get_password_policy_from_dn function in plugins/kdb/ldap/libkdb_ldap/ldap_pwd_policy.c in MIT Kerberos 5 (aka krb5) before 1.13.1, when the KDC uses LDAP, allows remote authenticated users to cause a denial of service (daemon crash) via a successful LDAP query with no results, as demonstrated by using an incorrect object type for a password policy.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Kerberos_5 | Mit | * | 1.13.1 (excluding) |
| Red Hat Enterprise Linux 6 | RedHat | krb5-0:1.10.3-37.el6_6 | * |
| Red Hat Enterprise Linux 7 | RedHat | krb5-0:1.12.2-14.el7 | * |
| Krb5 | Ubuntu | esm-infra-legacy/trusty | * |
| Krb5 | Ubuntu | lucid | * |
| Krb5 | Ubuntu | precise | * |
| Krb5 | Ubuntu | trusty | * |
| Krb5 | Ubuntu | trusty/esm | * |
| Krb5 | Ubuntu | upstream | * |
| Krb5 | Ubuntu | utopic | * |
Potential Mitigations
References
- http://advisories.mageia.org/MGASA-2014-0536.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155828.html
- http://lists.opensuse.org/opensuse-updates/2015-03/msg00061.html
- http://rhn.redhat.com/errata/RHSA-2015-0439.html
- http://rhn.redhat.com/errata/RHSA-2015-0794.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:009
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- http://www.securityfocus.com/bid/71679
- http://www.securitytracker.com/id/1031376
- http://www.ubuntu.com/usn/USN-2498-1
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=773226
- https://github.com/krb5/krb5/commit/d1f707024f1d0af6e54a18885322d70fa15ec4d3
- https://lists.debian.org/debian-lts-announce/2018/01/msg00040.html
- http://advisories.mageia.org/MGASA-2014-0536.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155828.html
- http://lists.opensuse.org/opensuse-updates/2015-03/msg00061.html
- http://rhn.redhat.com/errata/RHSA-2015-0439.html
- http://rhn.redhat.com/errata/RHSA-2015-0794.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:009
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- http://www.securityfocus.com/bid/71679
- http://www.securitytracker.com/id/1031376
- http://www.ubuntu.com/usn/USN-2498-1
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=773226
- https://github.com/krb5/krb5/commit/d1f707024f1d0af6e54a18885322d70fa15ec4d3
- https://lists.debian.org/debian-lts-announce/2018/01/msg00040.html