[ntp:security] [Bug 2948] New: Potential Infinite Loop in ntpq

bugzilla-daemon at ntp.org bugzilla-daemon at ntp.org
Sat Oct 17 09:10:22 UTC 2015


             Bug #: 2948
           Summary: Potential Infinite Loop in ntpq
           Product: ntp
           Version: 4.2.8
          Platform: All
        OS/Version: All
            Status: CONFIRMED
          Severity: normal
          Priority: P3
         Component: Security Bugs
        AssignedTo: stenn at ntp.org
        ReportedBy: stenn at ntp.org
                CC: security at ntp.org
             Group: Security
    Classification: Unclassified

Harlan Stenn <stenn at ntp.org> changed:

           What    |Removed                     |Added
              Flags|                            |blocking4.2.8+

Created attachment 1353
  --> http://bugs.ntp.org/attachment.cgi?id=1353

ntpq processes incoming packets in a loop in getresponse().  The loop's only
stopping conditions are receiving a complete and correct response or hitting a
small number of error conditions.  If the packet contains incorrect values that
don't trigger one of the error conditions, the loop continues to receive new

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