Vulnerabilities > CVE-2021-39900 - Information Exposure Through Log Files vulnerability in Gitlab
Attack vector
NETWORK Attack complexity
LOW Privileges required
HIGH Confidentiality impact
LOW Integrity impact
NONE Availability impact
NONE Summary
Information disclosure from SendEntry in GitLab starting with 10.8 allowed exposure of full URL of artifacts stored in object-storage with a temporary availability via Rails logs.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Fuzzing and observing application log data/errors for application mapping An attacker sends random, malformed, or otherwise unexpected messages to a target application and observes the application's log or error messages returned. Fuzzing techniques involve sending random or malformed messages to a target and monitoring the target's response. The attacker does not initially know how a target will respond to individual messages but by attempting a large number of message variants they may find a variant that trigger's desired behavior. In this attack, the purpose of the fuzzing is to observe the application's log and error messages, although fuzzing a target can also sometimes cause the target to enter an unstable state, causing a crash. By observing logs and error messages, the attacker can learn details about the configuration of the target application and might be able to cause the target to disclose sensitive information.