Vulnerabilities > CVE-2019-12434 - Use of Insufficiently Random Values vulnerability in Gitlab
Attack vector
NETWORK Attack complexity
LOW Privileges required
SINGLE Confidentiality impact
PARTIAL Integrity impact
NONE Availability impact
NONE Summary
An issue was discovered in GitLab Community and Enterprise Edition 10.6 through 11.11. Users could guess the URL slug of private projects through the contrast of the destination URLs of issues linked in comments. It allows Information Disclosure.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Brute Force In this attack, some asset (information, functionality, identity, etc.) is protected by a finite secret value. The attacker attempts to gain access to this asset by using trial-and-error to exhaustively explore all the possible secret values in the hope of finding the secret (or a value that is functionally equivalent) that will unlock the asset. Examples of secrets can include, but are not limited to, passwords, encryption keys, database lookup keys, and initial values to one-way functions. The key factor in this attack is the attackers' ability to explore the possible secret space rapidly. This, in turn, is a function of the size of the secret space and the computational power the attacker is able to bring to bear on the problem. If the attacker has modest resources and the secret space is large, the challenge facing the attacker is intractable. While the defender cannot control the resources available to an attacker, they can control the size of the secret space. Creating a large secret space involves selecting one's secret from as large a field of equally likely alternative secrets as possible and ensuring that an attacker is unable to reduce the size of this field using available clues or cryptanalysis. Doing this is more difficult than it sounds since elimination of patterns (which, in turn, would provide an attacker clues that would help them reduce the space of potential secrets) is difficult to do using deterministic machines, such as computers. Assuming a finite secret space, a brute force attack will eventually succeed. The defender must rely on making sure that the time and resources necessary to do so will exceed the value of the information. For example, a secret space that will likely take hundreds of years to explore is likely safe from raw-brute force attacks.
- Signature Spoofing by Key Recreation An attacker obtains an authoritative or reputable signer's private signature key by exploiting a cryptographic weakness in the signature algorithm or pseudorandom number generation and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.
- Session Credential Falsification through Prediction This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.
Nessus
| NASL family | FreeBSD Local Security Checks |
| NASL id | FREEBSD_PKG_4091069E860B11E9A05F001B217B3468.NASL |
| description | Gitlab reports : Remote Command Execution Vulnerability on Repository Download Feature Confidential Issue Titles Revealed to Restricted Users on Unsubscribe Disclosure of Milestone Metadata through the Search API Private Project Discovery via Comment Links Metadata of Confidential Issues Disclosed to Restricted Users Mandatory External Authentication Provider Sign-In Restrictions Bypass Internal Projects Allowed to Be Created on in Private Groups Server-Side Request Forgery Through DNS Rebinding Stored Cross-Site Scripting on Wiki Pages Stored Cross-Site Scripting on Notes Repository Password Disclosed on Import Error Page Protected Branches Restriction Rules Bypass Stored Cross-Site Scripting Vulnerability on Child Epics |
| last seen | 2020-03-18 |
| modified | 2019-06-04 |
| plugin id | 125687 |
| published | 2019-06-04 |
| reporter | This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/125687 |
| title | FreeBSD : Gitlab -- Multiple Vulnerabilities (4091069e-860b-11e9-a05f-001b217b3468) |
| code | |