CVE-2024-55656: redisbloom Integer Overflow or Wraparound

Vulnerability summary

CVE-2024-55656 is a high (CVSS 8.8) Integer Overflow or Wraparound vulnerability in redisbloom. EPSS estimates a 17.12% chance of exploitation in the next 30 days, higher than 97% of scored vulnerabilities.

Timeline

1. 08-01-2025
   PublishedVulnerability first disclosed.
2. 08-01-2025
   Last modifiedVulnerability information updated.

Description

RedisBloom adds a set of probabilistic data structures to Redis. There is an integer overflow vulnerability in RedisBloom, which is a module used in Redis. The integer overflow vulnerability allows an attacker (a redis client which knows the password) to allocate memory in the heap lesser than the required memory due to wraparound. Then read and write can be performed beyond this allocated memory, leading to info leak and OOB write. The integer overflow is in CMS.INITBYDIM command, which initialize a Count-Min Sketch to dimensions specified by user. It accepts two values (width and depth) and uses them to allocate memory in NewCMSketch(). This vulnerability is fixed in 2.2.19, 2.4.12, 2.6.14, and 2.8.2.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.