[Bug 596147] [NEW] KTorrent sending malformed extension command

[Greg Hazel]

Public bug reported:

Binary package hint: ktorrent

It appears KTorrent 3.3.4 and 4.0.0 (at least) have a bug when sending
an extension command. This causes it to lose connections with other
clients.

I caught this:

[2010-06-18 18:34:13.936]  1.2.3.4:50000(K): [KTorrent/4.0.0 (40.2)]: DEBUG: failed to parse extension command dict:
QS{⌐??V?♣7→ß>S??↕"°╒b#ÑeP↑░╟"→ßGφ┼⌂→≤Q?J÷‼?Rαg{╚╒OA☼┘ñ╩Wδ?'?I╒'?l?°U?^└Jñ^╨ZOp±├?╚ye-↑[÷↕▐S╕[├┐5

That looks pretty random, and nothing like bencoding. Maybe KTorrent has
a protocol encryption buffer management bug?

** Affects: ktorrent (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  Binary package hint: ktorrent
  
- It appears KTorrent 3.3.2 and 4.0.0 (at least) have a bug when sending
+ It appears KTorrent 3.3.4 and 4.0.0 (at least) have a bug when sending
  an extension command. I caught this:
  
  [2010-06-18 18:34:13.936]  1.2.3.4:50000(K): [KTorrent/4.0.0 (40.2)]: DEBUG: failed to parse extension command dict:
  QS{⌐??V?♣7→ß>S??↕"°╒b#ÑeP↑░╟"→ßGφ┼⌂→≤Q?J÷‼?Rαg{╚╒OA☼┘ñ╩Wδ?'?I╒'?l?°U?^└Jñ^╨ZOp±├?╚ye-↑[÷↕▐S╕[├┐5
  
  That looks pretty random, and nothing like bencoding. Maybe KTorrent has
  a protocol encryption buffer management bug?

** Description changed:

  Binary package hint: ktorrent
  
  It appears KTorrent 3.3.4 and 4.0.0 (at least) have a bug when sending
- an extension command. I caught this:
+ an extension command. This causes it to lose connections with other
+ clients.
+ 
+ I caught this:
  
  [2010-06-18 18:34:13.936]  1.2.3.4:50000(K): [KTorrent/4.0.0 (40.2)]: DEBUG: failed to parse extension command dict:
  QS{⌐??V?♣7→ß>S??↕"°╒b#ÑeP↑░╟"→ßGφ┼⌂→≤Q?J÷‼?Rαg{╚╒OA☼┘ñ╩Wδ?'?I╒'?l?°U?^└Jñ^╨ZOp±├?╚ye-↑[÷↕▐S╕[├┐5
  
  That looks pretty random, and nothing like bencoding. Maybe KTorrent has
  a protocol encryption buffer management bug?

-- 
KTorrent sending malformed extension command
https://bugs.launchpad.net/bugs/596147
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