From: Zooko O'Whielacronx <zooko@zooko.com>
Date: Tue, 22 Jul 2008 00:43:34 +0000 (-0700)
Subject: known_issues.txt: command-line arguments are leaked to other processes
X-Git-Tag: allmydata-tahoe-1.2.0~4
X-Git-Url: https://git.rkrishnan.org/components/com_hotproperty/%22doc.html/architecture.txt?a=commitdiff_plain;h=23a398f5f02c59006b866d47d5e657613fe0bbfc;p=tahoe-lafs%2Ftahoe-lafs.git

known_issues.txt: command-line arguments are leaked to other processes
---

diff --git a/docs/known_issues.txt b/docs/known_issues.txt
index 39c0b643..50d06728 100644
--- a/docs/known_issues.txt
+++ b/docs/known_issues.txt
@@ -6,7 +6,7 @@ to manage them.
 
 == issues in Tahoe v1.1.0, released 2008-06-11 ==
 
-=== issue 9: more than one file can match an immutable file cap ===
+=== issue 10: more than one file can match an immutable file cap ===
 
 In Tahoe v1.0 and v1.1.0, a flaw in the cryptographic integrity check
 makes it possible for the original uploader of an immutable file to
@@ -33,6 +33,29 @@ capability to your friend, and he uses it to download a file, you and
 your friend could get different files.
 
 
+=== issue 9: command-line arguments are leaked to other processes ===
+
+Remember that command-line arguments are visible to other users
+(through the 'ps' command, or the windows Process Explorer tool), so
+if you are using a Tahoe node on a shared host, other users on that
+host will be able to see (and capture) any directory caps that you set
+up with the "tahoe add-alias" command.
+
+==== how to manage it ====
+
+Bypass add-alias and edit the NODEDIR/private/aliases file directly,
+by adding a line like this:
+
+fun: URI:DIR2:ovjy4yhylqlfoqg2vcze36dhde:4d4f47qko2xm5g7osgo2yyidi5m4muyo2vjjy53q4vjju2u55mfa
+
+By entering the dircap through the editor, the command-line arguments are
+bypassed, and other users will not be able to see them. Once you've added the
+alias, no other secrets are passed through the command line, so this
+vulnerability becomes less significant: they can still see your filenames and
+other arguments you type there, but not the caps that Tahoe uses to permit
+access to your files and directories.
+
+
 === issue 8: server out of space when writing mutable file ===
 
 If a v1.0 or v1.1.0 storage server runs out of disk space or is