CVE-2023-2253: 
Helm vulnerability analysis and mitigation

CVE-2023-2253 is a vulnerability discovered in the /v2/_catalog endpoint of distribution/distribution software. The vulnerability was reported on April 24, 2023, and affects the Docker Registry component. The flaw allows malicious users to manipulate the n parameter, which controls the maximum number of records returned in the catalog endpoint (CVE Mitre, Ubuntu Security).

The vulnerability exists in the /v2/_catalog endpoint's parameter handling mechanism. When a user submits an unreasonably large value for the n query string parameter, it causes the allocation of a massive string array in memory. The vulnerability has been assigned a CVSS 3.1 base score of 6.5 (Medium), with attack vector being Network, attack complexity Low, and privileges required Low. The impact primarily affects system availability, with no direct impact on confidentiality or integrity (Ubuntu Security).

The primary impact of this vulnerability is the potential for denial of service (DoS) through excessive memory consumption. When exploited, the system allocates an unnecessarily large amount of memory for the string array, which can lead to resource exhaustion and system unavailability (Red Hat Bugzilla).

Multiple vendors have released patches to address this vulnerability. Red Hat has addressed the issue in OpenShift Container Platform versions 4.11, 4.12, and 4.13 through various security advisories. Ubuntu has released fixes for multiple versions including 23.04, 22.04 LTS, 20.04 LTS, and 18.04 LTS. Debian has also provided security updates for affected versions (Red Hat Bugzilla, Ubuntu Security).