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Serious security flaws in Microsoft web browser
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How safe is your computer?
àƒè÷¶ èEQ âšõ÷¾ ð£¶è£Šð£ù õ¬èJ™ Þ¼‚Aø¶?
By Mike Ingram
12 January 2002
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¬ñ‚«ó£ªê£Š®¡ Þòƒ° î÷ˆ¬î (Operating
Systems) cƒèœ ð£MŠðõó£è Þ¼‰î£™, ''àƒèœ èEQ âšõ÷¾ ð£¶è£Šð£è Þ¼‚Aø¶''
â¡ø «èœM‚è£ù ðF™, ''Üšõ÷¾ ð£¶è£Šð£è Þ™¬ô'' â¡ðî£è«õ Þ¼‚°‹.
ܪñK‚è£M½‹ ñŸÁ‹ 𣶠ä«ó£Šð£M½‹ ï‹H‚¬èJ¡¬ñ ªî£ì˜ð£ù
å¼ Cô õö‚°èO¡ ¬ñòˆF™ Þ¼‚°‹ ñ£ªð¼‹ ªñ¡ªð¼œ (Software)
GÁõù‹ ÞŠ«ð£¶ Üîù¶ õ£®‚¬èò£÷˜èO¡ Ü®Šð¬ì ð£¶è£Š¹‚° ÜFèKˆîº¬øJ™ àÁFŠð´ˆ¶õ
꣈FòñŸÁ Þ¼‚Aø¶. ºîL™ ªõOò£ù Þòƒ° î÷ƒè÷£ù
Windows 98 ñŸÁ‹ 95 Þ™ Þ™ô£î ðô ð£¶è£Š¹ Ü‹êƒèœ 𣶠ªõOò£AJ¼‚°‹
Windows XP Þòƒ° î÷ˆF™ ÜPºèŠð´ˆFJ¼‰î«ð£¶‹,
¬õóv ð£¶è£Š¹ â„êK‚¬èèœ ñŸÁ‹ ð£¶è£Š¹ °¬ø¾èÀ‚è£ù º¡ùP¾Š¹è¬÷ ªî£ì˜„Cò£è ð£õ¬ùò£÷˜èœ
ÞŠ«ð£¶‹ ºè‹ªè£´‚Aùøù˜.
''å«ó Íô‚ ªè£œ¬èœ'' ("same
origin policy") âù ÜPòŠð´‹ å¼ ð£¶è£Š¹ MF¬ò ¹ø‚èEŠðî¡ Íô‹ å¼ Ýðˆî£ù
ð£¶è£Š¹ 憬ì¬ò ¬ñ‚«ó£ªê£Š† ªè£‡®¼‚Aø¶ âù ܇¬ñJ™
"The Pull" â¡ø ªðòó£™ õNïìˆîŠð´‹ å¼ ²ò£bù ÝŒõ£÷˜èœ °Ÿø‹ê£†®»œ÷£˜èœ.
å¼ MˆFò£êñ£ù window (èíEˆF¬ó) å¼ Þ¬íò
«ñ«ô£®J™ Fø‚èŠð†®¼‚°‹ å¼ õ¬ôˆî÷‹ (website)
Þ¡ªù£¼ õ¬ôˆî÷ˆ¬î ð£FŠðF™ Þ¼‰¶ î´ŠðîŸè£ù °Ø‚°P¬ò (Code-°Pf´)
Þ‰î MF õ¬óAø¶.
JavaScript (
ü£õ£ vAPŠ†)
ðó‰î÷M™ å¼ scripting language
Ýè àð«ò£èŠð´ˆîŠð†´ õ¼Aø¶. Þ¶ å¼ õ¬ôˆî÷ˆ¬î ðF¾ªêŒî™, Ü„C´î™ «ð£¡ø ðô ïìõ®‚¬èè¬÷
²òñ£è ªêò™ð´ˆîõ™ô¶. Þœ "document.open,"
âùŠð´‹ è†ì¬÷Gó½‹ (command)
àœ÷ìƒAJ¼‚Aø¶. Þ‰î‚ è†ì¬÷ Gó™, °PŠH†ì ð£õ¬ùò£÷˜èO¡
ªêò™ð£´èÀ‚° ðFô£è å¼ Þó‡ì£õ¶ Þ¬íò «ñ«ô£®
window Fø‚èŠð´õ
ÜÂñF‚°‹. å¼ °PŠH†ì ÝõíˆF¡ Ü„²ŠHóF¬ò ªè£‡®¼‚°‹ å¼ Þó‡ì£õ¶
window FøŠðˆî£¡
Þ‰î è†ì¬÷ Gó™ ªð£¶õ£è ð£M‚èŠð†´õ¼Aø¶. ¹Fò
window FøŠðîŸè£è
ðò¡ð´ˆîŠð´‹ è†ì¬÷ Gó¬ô Ü®‚è® àð«ò£èŠð´ˆ¶‹ õ¬ôˆ î÷ƒèœ M÷‹ðóƒè¬÷»‹ Ü™ô¶ ã¬ùò
ªêŒFè¬÷»‹ ªè£‡®¼‚°‹.
Netscape (
àôègFò£è ºîô£õî£è
àð«ò£èŠð´ˆîŠð†ì Þ¬íò «ñ«ô£®)
Þ¡ ªð£PJô£÷˜è÷£™
JavaScript security guide
Þ¡ ð£èñ£è ÜHM¼ˆF ªêŒòŠð†ì
"Same origin policy"
ªè´Fò£ù õ¬ôˆî÷ƒèœ å¡ø¡ e¶ å¡Á Þòƒ°õ¬î»‹ ñŸÁ‹ MˆFò£êñ£ù
windows
Þ™ Þ¬íò «ñ«ô£®ò£™ Fø‚èŠð†®¼‚°‹ Þ¡ªù£¼ õ¬ôˆî÷ˆF™
Þ¼‰¶ ¸µ‚èñ£ù (sensitive)
îèõ™è¬÷ â´Šð¬î»‹ î´Šðî¡ ð£èñ£è¾‹ vî£H‚èŠð†ì¶.
¬ñ‚ªø£ªê£Š† Þ‰î ªè£œ¬è¬ò ¹ø‚èEˆ¶ Þ¼Šðî£è¾‹, Üîù¶ HóCˆF
ªðŸø 5.5, 6.0
Internet Explorer
Þ¬íò «ñ«ô£®èœ ÜŠð®ò£ù å¼ HóFð‡µ‹ ªêò™ð£†®Ÿ° ÜÂñFòO‚A¡øù
âù "The Pul"
Hóèìù‹ ªêŒF¼‚Aø¶. Þ¶ å¼ î£‚°îô£÷¬ó(attacker)
å¼ ð£˜¬õò£÷K¡ cookie files
Þ¼‰¶ F¼´õîŸè£ù ꣈Fòˆ¬î‚ªè£‡ì å¼ H«óˆFò£èñ£è à¼õ£‚èŠð†ì
õ¬ôˆî÷ˆF¬ù GÁ¾õ ÜÂñFòO‚Aø¶. Cookies
â¡ð¶ Ü®‚è® å¼ Þ¬íòˆFŸ° õ‰¶«ð£°‹ ð£õ¬ùò£÷˜è¬÷
Þù‹è£µõîŸè£è õ¬ôˆî÷ƒè÷£™ àð«ò£èŠð´ˆîŠð´‹ æKìˆF™ «êI‚èŠð†®¼‚°‹ ðF¾è÷£°‹.
HóCˆFªðŸø Þ¬íò õ˜ˆîè õ¬ôˆî÷ƒèœ,
Cookies Ýù¶ ð£õ¬ùò£÷K¡ Þô‚èˆF™ Þ¼‰¶ ÞóèCò„ªê£™
ñŸÁ‹ õƒA ܆¬ìJ¡ Þô‚è‹ õ¬ó ܬùˆ¶ îèõ™è¬÷»‹ ªè£‡®¼‚°‹. Üìù¢ ꣈Fòñ£ù îQŠð†ì
îèõ™èO¡ F¼†´ Cookies
Þ™ ÜìƒAJ¼‚A¡øù. å¼ ï‹H‚¬è I°‰î ê†ìgFò£ù å¼ õ¬ôˆî÷ˆFŸ°ˆî£¡
õ‰F¼‚A«ø¡ âù å¼ ð£õ¬ùò£÷¬ó ‹ð® ªêŒõ Þ‰î ð£¶è£Š¹ °¬ø𣴠ð£M‚èŠðìô£‹.
àî£óíñ£è, ÜŠð®ò£ù å¡ø£ù Þ¬íò õƒAJ™ å¼õ˜ îù¶ îQŠð†ì îèõ™è¬÷ ðF¾ªêŒ¶¬õ‚èô£‹.
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Ü«î 
"Active Scripting"
ä ªêòLö‚èªê£™L õ£®‚¬èò£÷˜èÀ‚° Ý«ô£ê¬ùªêŒ»‹ å¼
ð£¶è£Š¹ ÜP‚¬è å¡P¬ù ªõOJ´õ ¬ñ‚«ó£ªê£Š† G˜Šð‰îˆFŸ°œ÷£ù¶. °PŠH†ì õ¬ôˆî÷ƒè¬÷
𣘊ðîŸè£ù ð£õ¬ùò£÷˜èO¡ ê£îñ£ùñ¬ò î¬ìªêŒ»‹«ð£¶‹, ÜN¾‡ì£‚°‹ MˆFò£êñ£ù õ¬ôˆî÷ˆ¬î»‹,
I¡ù…ê¬ô Ü®Šð¬ìò£è ªè£‡ì¶ñ£ù õ¬ôˆ î÷ ð‚èƒèO™ Þ¼‰¶ Üõ˜è¬÷ ܶ ð£¶è£‚èô£‹.
Þ‰î ð£¶è£Š¹ °¬ø𣴠ðŸPò ªêŒF‚è£ù ¬ñ‚«ó£ªê£ŠŸP¡ ðFô£ù¶
GÁõùˆF¡ 'ªð£ÁŠH¡¬ñ¬ò' Þ¶ Ü‹ðôŠð´ˆFJ¼Šðî£è °Ÿø‹ ꣆´õî£è Þ¼‰î¶. ïõ‹ð˜ 8
ÜPMˆî½‚° º¡ù˜ ð£¶è£Š¹ 憬ìJ¬ùŠ ðŸP ⶾ«ñ ªîKòM™¬ô âù ¬ñ‚«ó£ªê£Š† ÜPMˆî¶. âŠð®J¼‰î«ð£¶‹,
ïõ‹ð˜ 19
ZDNet UK technology
õ¬ôˆî÷ˆF¡ 膴¬óJ¡ Hóè£ó‹, ïõ‹ð˜ ºîô£‹ FèF‚° å¼ Aö¬ñ‚°
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܉î â„êK‚¬èJ¬ù Ìóíñ£è Mê£ó¬í ªêŒõ Þó‡´ õ£ó‹ º¿õ¶ñ£è
ÜõCòñ£è Þ¼‰î¶ âù ¬ñ‚«ó£ªê£Š† ÜPMˆî¶ì¡, è£ôî£ñˆF¡ M¬÷õ£è â‰îMî ð£¶è£Š¹
躋 Þ싪ðøM™¬ô âù Ü¿ˆîñ£è °PŠH†ì¶.
'' àìù®ò£è ªîOõ£è ðFôO‚芫ð£õF™¬ô-- âšõ÷¾ ï‹ðˆ î°‰î
ÜN¾‡ì£‚°‹ â„êK‚¬èò£è Þ¼‚Aø¶ â¡ð¬î õ¬óòÁ‚è  «è£¶¬ñ¬ò àIJ™ Þ¼‰¶ ÜKˆ¶ â´‚è«õ‡®J¼‚Aø¶,''
''îõø£ù Üð£ò åL¬ò à¼õ£‚°‹ â¡ð Þ‰î Mõè£óˆ¬î  Mê£ó¬í ªêŒ»‹ õ¬ó, Þ‰î
Mìò‹ ðŸPò å¼ ÜP‚¬è¬ò  ªõOJ슫ð£õF™¬ô'' âù
Windows àŸðˆFJ¡
Mò£ð£ó «ñô£÷˜ Neil Laver, ZDNet
Þì‹ °PŠH†ì£˜.
ð£¶è£ð¢¹
ðôiù‹ ðŸP ðAóƒèñ£è ÜP‚¬è ªõOJ´õ ñ†´‹
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ðF¬ô»‹ ÜO‚èM™¬ô âù
ZDNet ÜP‚¬èM†ì¶.
ïõ‹ð˜ 1 Þ™,  致H®ˆî å¼ Ýðˆî£ù ð£¶è£Š¹ 般î
ªî£N™¸†ð Mõóˆ¶ì¡ ¬ñ‚«ó£ªê£Š®¡
ð£¶è£Š¹ ðFôOŠ¹ ¬ñòˆFŸ°
IT security firm Online Solutions
â¡Â‹ GÁõù‹
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 ܉î Mõè£óˆ¬î îò M¬óM™ Mê£ó¬í ªêŒõî£è àÁFòOˆ¶ å¼ õ£óˆF¡ H¡ù¼‹
¬ñ‚«ó£ªê£Š®ì‹ Þ¼‰¶ â‰î ðF½‹ õó£î,
Online Solutions ªð£¶ñ‚èOì‹ Þî¬ù‚ ªè£‡´«ð£è
º®ªõ´ˆî¶.
'' ªð£ÁŠð£ù è£Kò‹ ªêŒ«î£‹-- Mò£ð£óˆFŸè£è ªñ¡ªð£¼¬÷
àð«ò£èŠð´ˆ¶‹ ñŸÁ‹ îQŠð†ì îèõ™è¬÷ ÜF™ ¬õˆF¼Šð¬îJ†´ ï‹H‚è¬ò ªè£‡®¼‚°‹ ñ‚èœ,
ܬõ ð£¶è£Šð£ùî£è Þ™¬ô â¡ð °PŠH†ì èÀ‚° MNŠ¹ì¡ Þ¼‚辋''
Online Solutions
Þ¡ G˜õ£è Þò‚°ù˜
Jyrki Salmi
ÃPù£˜.
â‰î ܘˆîˆF½‹ ð£¶è£Š¹ °¬øð£´èœ ¬ñ‚«ó£ªê£Š† ªñ¡ªð£¼œèÀ‚°
ñ†´‹ ñ†´Šð´ˆîŠð†ìî™ô. ðô Þô†ê‚èí‚è£ù èEQ °¿‚ °PèO¡(
computer
code) Þ¬öè¬÷ ªè£‡®¼‚°‹
Internet Explorer
«ð£¡ø C‚èô£ù ðò¡ð£†´
(applications)
°¬øð£´èÀ‚° ¹è›ªðŸø¬õ. Þ¬õèO™ ⶾ‹ ðK«ê£î¬ù ªêŒ»‹ G¬ôJ™ Ãì °¬øð£´è¬÷ è¬÷òM™¬ô.
ðó‰î Ü÷M™ å¼ èEQ ܬñŠH¡ G˜õ£AèO¡ ªî£N™ ªð¼‹ªî£¬èò£ù â‰î ܬñŠH½‹ ªêò™ð´‹
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à¼õ£‚°õ¬î ªè£‡®¼‚Aø¶. ðó‰î Ü÷M™ Iè º‚Aòñ£ù ð£¶è£Š¹ °¬øð£´èœ Ýðˆî£ù Hó„ê¬ùè¬÷
M¬÷õ£‚è£î ð®»‹, îò M¬óM™ C‚èô£ù MìòƒèÀ‚°‹ ªñ¡ªð¼¬÷ ÜHM¼ˆF ªêŒðõ˜èœ M¬óõ£è
ðFôO‚è«õ‡´‹. ¬ñ‚«ó£ªê£Š† àìù£ù Mõè£óñ£ù¶ Üîù¶ ܬùˆ¶
programmes à‹
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îõPM†ì¶ â¡ð‹. ܈¶ì¡ ÜPòŠð†ì
ðôiùƒè¬÷, °¬ø‰îð†ê‹ ܇¬ñò Hó„ê¬ùò£ù
Active Scripting
ä ªêòLö‚è ªêŒîô£ù ⃰‹ A¬ì‚°‹ å¼ ê£î£óí è£Kòˆ¬î‚
Ãì Üîù¶ ªñ¡ªð£¼O¡ ð£õ¬ùò£÷˜èÀ‚° ªîKòŠð´ˆîM™¬ô.
ÜŠð® å¼ ÜPMˆî¬ô  ªõOJ†®¼‰î£™ ªè´«ï£‚躜÷ °îô£÷˜è¬÷
(
hackers)
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å¼ M÷‚èñ£°‹.
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ß´ð†ì¶ì¡ º¡¬õ‚èŠð†ì b˜¬õ ªî£ì˜„Cò£è Gó£èKˆîù. cFðF
Judge Jackson Ý«ô£ê¬ù ªêŒî¶«ð£™, GÁõùˆF¡ ð£¶è£Š¹ «î£™Mèœ ê‰«îèñŸø
º¬øJ™ ñ£ªð¼‹ ªñ¡ªð¼œ GÁõù‹ ޡ‹ ªï£¼ƒAMìM™¬ô â¡ø ÜÂî£ðƒè¬÷ ªð£ƒAªòö¬õ‚°‹.
Þšõö‚° Üîù¶ Þ¬íò
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systems) ¬ñ‚«ó£ªê£Š† âŠð® îù¶ ãè«ð£èˆ¬î ðò¡ð´ˆFò¶ â¡ð«î ÜPòŠð†ì ºî™
õö‚° Mê£ó¬íò£°‹. å¼ ðó‰î ð£õ¬ùò£÷˜è¬÷ Ü®Šð¬ìò£è ªè£‡®¼‚°‹ «ð£†®ò£÷ó£ù
Netscape Þ¬íò «ñ«ô£®,
Windows ÞŸ° ÜHM¼ˆF ªêŒòŠð´‹ ð£õ¬ùèÀ‚°
å¼ ñ£Ÿl´ «ñ¬ìò£è õ‰¶M´õF™ Þ¼‰¶ î´Š¬î«ò ¬ñ‚«ó£ªê£Š† èõù‹ ªè£‡®¼‰î¶.
Netscape Navigator ä Mì
Internet Explorer Iè ÜŸ¹îñ£ù àŸðˆF
â¡ðô ܶ ªõŸPªðŸø¶ âù õö‚° Mê£ó¬íJ¡ «ð£¶ ¬ñ‚«ó£ªê£Š† õL»ÁˆFò¶. à‡¬ñJ™,
MK‰î àôè õ¬ôòˆF¡ M¬óõ£ù HóCˆFJ¡ áì£è«õ ¬ñ‚«ó£ªê£Š† ÜPòŠð†ì¶ì¡,
Netscape Þì‹ Þ¼‰¶ H¡ùE¬ò ªõŸPªè£œÀ‹ ºòŸCJ™
Þôõêñ£è ªè£´‚èŠð†ìî¡ è£óíñ£è«õ Internet
Explorer b¯ªó¡Á Þìˆ¬îŠ H®ˆ¶‚ªè£‡ì¶.
cFðF Jackson Þ¡
Ý«ô£ê¬ùèO¡ Ü®Šð¬ì ñÁŠð£ù¶ ¬ñ‚«ó£ªê£Š†®™ ã¬ùò 膴Šð£´èÀ‚° ܬöŠ¹M쾋,
ªñ¡ªð¼O¡ º‚Aòñ£ù ªêò™ð£´è¬÷ õ¬óò¬ø ªêŒ»‹
Internet Explorer Þ¡ Íô õ¬ó¾ (source
code) Þ¬ù A¬ì‚°‹ð® à¼õ£‚è«õ‡´‹ âù «è£K‚¬è ⿊𾋠îœO»œ÷¶.
îƒèO¡ ªî£N™¸†ð «ñ¡¬ñò£™  îñ¶ àŸðˆFèœ ðóõô£è ð£M‚èŠð´Aø¶
âù Mõ£FŠðî¡ Íô‹ îù¶ ãè«ð£è G¬ô¬ò ¬ñ‚«ó£ªê£Š† ªî£ì‚èˆF™ Gò£òŠð´ˆî º¬ù‰î¶. âŠð®J¼‰î«ð£¶‹,
''Open Source software" (Fø‰î Íô
ªñ¡ªð£¼œ) Þ¡ õ÷˜„C»‹ ñŸÁ‹ °PŠð£è Þôõêñ£è ð£M‚è‚îòî£è Þ¼‚°‹
Linux Þòƒ°î÷ˆF™ ªñ¡ªð£¼œèœ ªêò™ð´õ¶‹
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à¼õ£‚A»œ÷¶. Guardian Online °PŠH†ìî¡ð®,
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Üõï‹H‚¬è»ì¡ ¹ˆFpMî ªê£ˆF¡ ð‚è‹ (intellectual
property) F¼‹H»œ÷¶.
''ܶ ªî£´‹ ܬùˆF½‹ å¼ ¹ˆFpMî ªê£ˆ¶K¬ñ Ü®ˆî÷ˆF™ ù ެ툶‚ªè£œÀ‹
Linux å¼ ¹ŸÁ«ï£ò£è Þ¼‚Aø¶'' âù
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Ballmer °PŠH†ì¬î ðˆFK‚¬è «ñŸ«è£œ 裆®ò¶.
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