[krbdev.mit.edu #7638] git commit

[Tom Yu via RT]

Fix kpasswd UDP ping-pong [CVE-2002-2443]

The kpasswd service provided by kadmind was vulnerable to a UDP
"ping-pong" attack [CVE-2002-2443].  Don't respond to packets unless
they pass some basic validation, and don't respond to our own error
packets.

Some authors use CVE-1999-0103 to refer to the kpasswd UDP ping-pong
attack or UDP ping-pong attacks in general, but there is discussion
leading toward narrowing the definition of CVE-1999-0103 to the echo,
chargen, or other similar built-in inetd services.

Thanks to Vincent Danen for alerting us to this issue.

CVSSv2: AV:N/AC:L/Au:N/C:N/I:N/A:P/E:P/RL:O/RC:C

(cherry picked from commit cf1a0c411b2668c57c41e9c4efd15ba17b6b322c)

https://github.com/krb5/krb5/commit/a273b12e3fe8678d7bf3c3c4f39d3f08a192a720
Author: Tom Yu <tlyu at mit.edu>
Commit: a273b12e3fe8678d7bf3c3c4f39d3f08a192a720
Branch: krb5-1.10
 src/kadmin/server/schpw.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)