SB2014121703 - NULL pointer dereference in web.mit.edu krb5

Description

This security bulletin contains information about 1 security vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2014-5354)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.1, when the KDC uses LDAP, allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) by creating a database entry for a keyless principal, as demonstrated by a kadmin "add_principal -nokey" or "purgekeys -all" command. <a href="http://cwe.mitre.org/data/definitions/476. A remote attacker can perform a denial of service (DoS) attack.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• http://lists.opensuse.org/opensuse-updates/2015-03/msg00061.html
• http://www.securityfocus.com/bid/71680
• http://www.securitytracker.com/id/1031376
• http://www.ubuntu.com/usn/USN-2498-1
• https://github.com/krb5/krb5/commit/04038bf3633c4b909b5ded3072dc88c8c419bf16