Bug #8300
diag_system_activity.php: Potential XSS due to encoding of process output
100%
Description
The top command output is printed to the user without encoding, so if a malicious process is started which contains HTML in its command line or process description then it could trigger an XSS in an administrator's browser.
In order to take advantage of this issue, the user must already be able to execute arbitrary processes, which is a very high barrier. Someone in a position to do this could do far worse things to a system than trigger an XSS.
Associated revisions
Fix a potential encoding issue in diag_system_activity.php. Fixes #8300
(cherry picked from commit c083e1e49af4902d15173d412feebd8b86a616ee)
Fix a potential encoding issue in diag_system_activity.php. Fixes #8300
(cherry picked from commit c083e1e49af4902d15173d412feebd8b86a616ee)
Fix a potential encoding issue in diag_system_activity.php. Fixes #8300
(cherry picked from commit c083e1e49af4902d15173d412feebd8b86a616ee)
History
#1
Updated by Jim Pingle 7 months ago
Updated by - Status changed from Confirmed to Feedback
- % Done changed from 0 to 100
Applied in changeset c083e1e49af4902d15173d412feebd8b86a616ee.
#2
Updated by James Dekker 5 months ago
Updated by Running
grep -r '<script>alert(1)</script>' /
from shell on 2.4.2 generated an alert on Diag > System Activity.
But on pfSense-netgate-memstick-ADI-2.4.3-DEVELOPMENT-amd64-20180307-0900 no alert was generated (the issue appears fixed).
#3
Updated by Jim Pingle 5 months ago
- Status changed from Feedback to Resolved
#4
Updated by Jim Pingle 5 months ago
- Private changed from Yes to No
Fix a potential encoding issue in diag_system_activity.php. Fixes #8300