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Bug #63725 tilde (~) in public and private keyfile paths causes memory corruption
Submitted: 2012-12-08 02:04 UTC Modified: 2021-02-10 11:25 UTC
Avg. Score:5.0 ± 0.0
Reproduced:2 of 2 (100.0%)
Same Version:0 (0.0%)
Same OS:1 (50.0%)
From: tcolton at gmail dot com Assigned: cmb (profile)
Status: Duplicate Package: ssh2 (PECL)
PHP Version: 5.4.9 OS: any
Private report: No CVE-ID: None
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From: tcolton at gmail dot com
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 [2012-12-08 02:04 UTC] tcolton at gmail dot com
When you pass in a public or private keyfile path that has a tilde, there seems be 
some memory corruption that causes a segfault or weird issues the next 
time, in the same process, you attempt to authenticate with keyfiles.

If you pass full paths to the keyfiles, the problem goes away.

Test script:
// Attempt one
$connection = ssh2_connect('localhost', 22);
ssh2_auth_pubkey_file($connection, 'user', '~/.ssh/', '~/.ssh/id_rsa');

// Attempt two
$connection = ssh2_connect('localhost', 22);
ssh2_auth_pubkey_file($connection, 'user', '~/.ssh/', '~/.ssh/id_rsa');

// Attempt three
$connection = ssh2_connect('localhost', 22);
ssh2_auth_pubkey_file($connection, 'user', '~/.ssh/', '~/.ssh/id_rsa');


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 [2013-01-26 21:24 UTC] camspiers at gmail dot com
I was able to replicate this issue, but I also found a fix. If you run 
unset($connection); after each connection the segfault goes away.
 [2021-02-10 11:25 UTC]
-Status: Open +Status: Duplicate -Assigned To: +Assigned To: cmb
 [2021-02-10 11:25 UTC]
Closing as duplicate of bug #73578.
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Last updated: Mon Apr 19 10:01:36 2021 UTC