CVE-2021-32626 - Remote Code Execution (RCE)

Abstract

Redis is an open source, in-memory database that persists on disk. In affected versions specially crafted Lua scripts executing in Redis can cause the heap-based Lua stack to be overflowed, due to incomplete checks for this condition. This can result with heap corruption and potentially remote code execution. This problem exists in all versions of Redis with Lua scripting support, starting from 2.6. The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14. For users unable to update an additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from executing Lua scripts. This can be done using ACL to restrict EVAL and EVALSHA commands.

The Oxygen XML products incorporate Redis as a third-party library. This advisory was opened to address the potential impact of this third-party library vulnerability.

Affected Products/Versions

Mitigation

None

Detail

CVE-2021-32626

Severity: High

CVSS Score: 8.8

The Redis third-party library used by Oxygen XML products is an affected version mentioned in CVE-2021-32626 vulnerability description. However, execution of Lua scripts is disabled in our products. For that reason, we have rated the severity level for our products as low.