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Short Name

CHAT:AUDIT:YMSG:OFLOW-RESP-CRPT

Severity

Info

Recommended

No

Category

CHAT

Release Date

2003/04/22

Update Number

1213

Supported Platforms

idp-4.0+, isg-3.0+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+

YMSG: Response Crypt Overflow


This protocol anomaly is a Yahoo! Messenger challenge response message with a length that exceeds the user-defined maximum. A Yahoo! Messenger client sends a challenge response message after receiving the server challenge during the authentication process. The default challenge response length is 1024; you can change this setting in the Sensor Settings Rulebase>Protocol Thresholds and Configuration>Yahoo! Messenger>Crypt length.

Extended Description

None

References

  • URL: http://www.venkydude.com/articles/yahoo.htm
  • URL: http://libyahoo2.sourceforge.net/ymsg-9.txt
  • URL: http://messenger.yahoo.com/

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