CVE-2021-32627

Summary

Redis is an open source, in-memory database that persists on disk. In affected versions an integer overflow bug in Redis can be exploited to corrupt the heap and potentially result with remote code execution. The vulnerability involves changing the default proto-max-bulk-len and client-query-buffer-limit configuration parameters to very large values and constructing specially crafted very large stream elements. The problem is fixed in Redis 6.2.6, 6.0.16 and 5.0.14. For users unable to upgrade an additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the proto-max-bulk-len configuration parameter. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.

Affected Software

VendorProductVersion RangeStatus
redisredis>= 5.0.0, < 5.0.14affected
redisredis>= 6.0.0, < 6.0.16affected
redisredis>= 6.2.0, < 6.2.6affected

Weaknesses

  • CWE-190: CWE-190: Integer Overflow or Wraparound
  • CWE-680: CWE-680: Integer Overflow to Buffer Overflow

ADP Enrichment

CVE Program Container

Additional References

References