CVE-2021-32626
moderate-risk
Published 2021-10-04
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.
Do I need to act?
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0.79% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ HIGH complexity
Affected Products (11)
Affected Vendors
References (20)
Third Party Advisory
https://github.com/redis/redis/security/advisories/GHSA-p486-xggp-782c
Third Party Advisory
https://security.gentoo.org/glsa/202209-17
Third Party Advisory
https://security.netapp.com/advisory/ntap-20211104-0003/
Third Party Advisory
https://www.debian.org/security/2021/dsa-5001
Third Party Advisory
https://github.com/redis/redis/security/advisories/GHSA-p486-xggp-782c
Third Party Advisory
https://security.gentoo.org/glsa/202209-17
Third Party Advisory
https://security.netapp.com/advisory/ntap-20211104-0003/
Third Party Advisory
https://www.debian.org/security/2021/dsa-5001
41
/ 100
moderate-risk
Severity
22/34 · High
Exploitability
3/34 · Minimal
Exposure
16/34 · Moderate