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The libkrb5 ASN.1 decoder supports BER indefinite lengths. It
computes the tag length using recursion; the lack of a recursion limit
allows an attacker to overrun the stack and cause the process to
crash. Reported by Demi Obenour.
CVE-2020-28196:
In MIT krb5 releases 1.11 and later, an unauthenticated attacker can
cause a denial of service for any client or server to which it can
send an ASN.1-encoded Kerberos message of sufficient length.
ticket: 8959 (new)
tags: pullup
target_version: 1.18-next
target_version: 1.17-next
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