J-Security Center

Title: Bash Path Embedded Code Execution Vulnerability

Severity: MODERATE

Description:

A vulnerability in bash may allow inadvertently running commands embedded in the path to the currently working directory.

If an unsuspecting user enters a directory created by some malicious user with embedded commands, and their prompt (PS1) contains '\w' or '\W', and the prompt is displayed the commands will be executed. The vulnerability is in the parsing of the '\w' and '\W' escape codes.

As the prompt must be displayed unattended shell scripts are not vulnerable.

Affected Products:

  • GNU GNU bash 1.14.0

Juniper Networks provides this content via a wide variety of sources and production methods. If notified of errors or omissions in the content of this page, Juniper Networks, at its discretion, will modify or remove the page or leave the content as is, depending on various factors including but not limited to the reputation and authority of the party providing the notification. Please use the contact information displayed elsewhere on this page to report any errors or omissions regarding the content on this page.