schpw.c in the kpasswd service in kadmind in MIT Kerberos 5 (aka krb5) before 1.11.3 does not properly validate UDP packets before sending responses, which allows remote attackers to cause a denial of service (CPU and bandwidth consumption) via a forged packet that triggers a communication loop, as demonstrated by krb_pingpong.nasl, a related issue to CVE-1999-0103.
NOTE: The following CVSS v2.0 metrics and score provided are preliminary and subject to review.
|Base Score:||5||Base Metrics:||AV:N/AC:L/Au:N/C:N/I:N/A:P|
|Access Vector:||Network||Attack Complexity:||Low|
|Authentication:||None required||Confidentiality Impact:||None|
|Integrity Impact:||None||Availability Impact:||Partial|
|Oracle Linux version 5 (krb5)||ELSA-2013-0942||2013-06-12|
|Oracle Linux version 6 (krb5)||ELSA-2013-0942||2013-06-12|
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