[ GLSA 200911-06 ] PEAR Net_Traceroute: Command injection

[GLSA]

Gentoo Linux Security Advisory

Title: PEAR Net_Traceroute: Command injection (GLSA 200911-06)
Severity: high
Exploitable: remote
Date: November 26, 2009
Bug(s): #294264
ID: 200911-06

Synopsis


An input sanitation error in PEAR Net_Traceroute might allow remote
attackers to execute arbitrary commands.


Background


PEAR Net_Traceroute is an OS independent wrapper class for executing
traceroute calls from PHP.


Affected Packages

Package: dev-php/PEAR-Net_Traceroute
Vulnerable: < 0.21.2
Unaffected: >= 0.21.2
Architectures: All supported architectures


Description


Pasquale Imperato reported that the $host parameter to the traceroute()
function in Traceroute.php is not properly sanitized before being
passed to exec().


Impact


A remote attacker could exploit this vulnerability when user input is
passed directly to PEAR Net_Traceroute in a PHP script, possibly
resulting in the remote execution of arbitrary shell commands with the
privileges of the user running the affected PHP script.


Workaround


Ensure that all data that is passed to the traceroute() function is
properly shell escaped (for instance using the escapeshellcmd()
function).


Resolution


All PEAR Net_Traceroute users should upgrade to the latest version: