Impact
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.
Patches
The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14.
Credit
This issue was discovered and reported by Microsoft Vulnerability Research.
For more information
If you have any questions or comments about this advisory:
Impact
The
redis-clicommand line tool andredis-sentinelservice may be vulnerable to integer overflow when parsing specially crafted large multi-bulk network replies. This is a result of a vulnerability in the underlyinghiredislibrary which does not perform an overflow check before calling thecalloc()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-sentineluses thejemallocallocator which is also not vulnerable.Patches
The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14.
Credit
This issue was discovered and reported by Microsoft Vulnerability Research.
For more information
If you have any questions or comments about this advisory: