Overview
About vulnerability
Impact
Morgan’s :remote-user token extracts the Basic auth username from the Authorization header and writes it to the log stream without neutralizing control characters. An attacker can send a crafted Authorization: Basic header containing CR/LF characters to inject forged log lines, corrupting the one-request-per-line structure of access logs.
The built-in combined, common, default, and short formats are affected, as well as any custom format that includes :remote-user.
Patches
Users should upgrade to version 1.11.0.
Workarounds
Use a custom format string that does not include :remote-user.
Details
- Affected product:
- Express , connect , loopback , morgan , strong-remoting
- Affected packages:
- loopback @ 1.10.0 (+4 more)