# \[Bug #1789\] TCPSocket#read returns untainted string

**URL:** <https://www.ruby-forum.com/t/bug-1789-tcpsocket-read-returns-untainted-string/172315>\
**Category:** Development\
**Created:** [July 19, 2009, 10:21am UTC](https://www.ruby-forum.com/t/bug-1789-tcpsocket-read-returns-untainted-string/172315 "2009-07-19T10:21:14Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![masa16](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/7ba0ec/32.png) [@masa16](https://www.ruby-forum.com/u/masa16)\
**Post date:** [July 19, 2009, 10:21am UTC](https://www.ruby-forum.com/t/bug-1789-tcpsocket-read-returns-untainted-string/172315/1 "2009-07-19T10:21:14Z")

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Bug #1789: TCPSocket#read returns untainted string  
[http://redmine.ruby-lang.org/issues/show/1789](http://redmine.ruby-lang.org/issues/show/1789)

e$B5/I\<\<Te(B: Masahiro T.  
e$B%9%F!\<%?%9e(B: Open, e$BM%@hEYe(B: Normal  
e$B%+%F%4%je(B: ext  
ruby -v: 1.9.2dev (2009-07-19 trunk 24201) [i686-linux]

e$B$H$\_$?$G$9!#e(B

TCPSocket#read e$B$,e(B untainted e$BJ8;zNs$rJV$7$^$9!#e(B

$ ruby -v -rsocket -e ‘p TCPSocket.new(“localhost”,25).read(4).tainted?’  
ruby 1.9.2dev (2009-07-19 trunk 24201) [i686-linux]  
false

1.8.7 e$B$G$Oe(B tainted e$B$G$9!#e(B

$ ruby -v -rsocket -e ‘p TCPSocket.new(“localhost”,25).read(4).tainted?’  
ruby 1.8.7 (2008-08-11 patchlevel 72) [i486-linux]  
true

e$B$A$J$\_$Ke(B TCPSocket#gets e$B$Oe(B tainted e$B$K$J$j$^$9!#e(B

$ /usr/local/ruby-1.9.1/bin/ruby -v -rsocket -e ‘p  
TCPSocket.new(“localhost”,25).gets.tainted?’  
ruby 1.9.2dev (2009-07-19 trunk 24201) [i686-linux]  
true

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<div class="post-metadata">

**Author:** ![masa16](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/7ba0ec/32.png) [@masa16](https://www.ruby-forum.com/u/masa16)\
**Post date:** [July 19, 2009, 10:37am UTC](https://www.ruby-forum.com/t/bug-1789-tcpsocket-read-returns-untainted-string/172315/2 "2009-07-19T10:37:35Z")

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e$B%A%1%C%He(B #1789 e$B$,99?7$5$l$^$7$?!#e(B (by Nobuyoshi N.)

e$B%9%F!\<%?%9e(B Opene$B$+$ie(BClosede$B$KJQ99e(B  
e$B?JD=e(B % 0e$B$+$ie(B100e$B$KJQ99e(B

## Applied in changeset r24203.

[http://redmine.ruby-lang.org/issues/show/1789](http://redmine.ruby-lang.org/issues/show/1789)

---

<div class="post-metadata">

**Author:** ![masa16](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/7ba0ec/32.png) [@masa16](https://www.ruby-forum.com/u/masa16)\
**Post date:** [July 26, 2009, 5:37pm UTC](https://www.ruby-forum.com/t/bug-1789-tcpsocket-read-returns-untainted-string/172315/3 "2009-07-26T17:37:35Z")

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e$B%A%1%C%He(B #1789 e$B$,99?7$5$l$^$7$?!#e(B (by Yuki S.)

e$B%9%F!\<%?%9e(B Assignede$B$+$ie(BClosede$B$KJQ99e(B

## Applied in changeset r24290.

[http://redmine.ruby-lang.org/issues/show/1789](http://redmine.ruby-lang.org/issues/show/1789)