CVE-2021-32762

Summary

Redis is an open source, in-memory database that persists on disk. The redis-cli command line tool and redis-sentinel service may be vulnerable to integer overflow when parsing specially crafted large multi-bulk network replies. This is a result of a vulnerability in the underlying hiredis library which does not perform an overflow check before calling the calloc() heap allocation function. This issue only impacts systems with heap allocators that do not perform their own overflow checks. Most modern systems do and are therefore not likely to be affected. Furthermore, by default redis-sentinel uses the jemalloc allocator which is also not vulnerable. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14.

Affected Software

VendorProductVersion RangeStatus
redisredis< 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