From: Zooko O'Whielacronx 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/pf/content/en/(%5B%5E?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