Log Injection

2024-04-2205:53:55

Veracode Vulnerability Database

sca.analysiscenter.veracode.com

flask-cors

log injection

debug log level

output neutralization

crlf sequences

corrupt log files

get requests

attack

log post-processing

log entries

security vulnerability

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

AI Score

7.1

Confidence

High

EPSS

Percentile

9.0%

JSON

flask-cors is vulnerable to Log Injection when the log level is set to debug. The vulnerability is due to improper output neutralization for logs within extension.py. This allows attackers to insert fake log entries through specially crafted GET requests containing CRLF sequences in the request path leading to corrupt log files, potentially covering tracks of other attacks, confusing log post-processing tools, and forging log entries