CVE-2023-25155: 
Redis vulnerability analysis and mitigation

Redis vulnerability CVE-2023-25155 affects all Redis versions prior to versions 6.0.18, 6.2.11, and 7.0.9. The vulnerability was discovered by Yupeng Yang and disclosed on February 28, 2023. This security issue affects Redis, an in-memory database that persists on disk, specifically impacting the SRANDMEMBER, ZRANDMEMBER, and HRANDFIELD commands (Redis Release, GitHub Advisory).

The vulnerability is characterized by an integer overflow condition that can be triggered by authenticated users issuing specially crafted SRANDMEMBER, ZRANDMEMBER, and HRANDFIELD commands. The issue occurs when passing a negative long value that is greater than the maximum positive value that the long can store. The vulnerability has been assigned a CVSS v3.1 base score of 5.5 (Moderate) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (GitHub Advisory).

When successfully exploited, this vulnerability results in a runtime assertion and termination of the Redis server process, effectively causing a denial of service condition. The impact is limited to availability, with no direct effect on confidentiality or integrity of the data (GitHub Advisory).

The vulnerability has been patched in Redis versions 6.0.18, 6.2.11, and 7.0.9. Users are advised to upgrade to these versions or later to mitigate the vulnerability. The fix involves implementing proper input validation for the affected commands (Redis Release, Redis Release, Redis Release).