CVE Vulnerabilities

CVE-2021-22553

Uncontrolled Resource Consumption

Published: Feb 17, 2021 | Modified: Nov 21, 2024
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu

Any git operation is passed through Jetty and a session is created. No expiry is set for the session and Jetty does not automatically dispose of the session. Over multiple git actions, this can lead to a heap memory exhaustion for Gerrit servers. We recommend upgrading Gerrit to any of the versions listed above.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

Name Vendor Start Version End Version
Gerrit Google * 2.15.22 (excluding)
Gerrit Google 2.16.0 (including) 2.16.26 (excluding)
Gerrit Google 3.0.0 (including) 3.0.16 (excluding)
Gerrit Google 3.1.0 (including) 3.1.12 (excluding)
Gerrit Google 3.2.0 (including) 3.2.7 (excluding)
Gerrit Google 3.3.0 (including) 3.3.2 (excluding)

Potential Mitigations

  • Mitigation of resource exhaustion attacks requires that the target system either:

  • The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

  • The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

References