CVE-2021-32625

moderate-risk

Published 2021-06-02

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker. An integer overflow bug in Redis version 6.0 or newer, could be exploited using the STRALGO LCS command to corrupt the heap and potentially result with remote code execution. This is a result of an incomplete fix by CVE-2021-29477. The problem is fixed in version 6.2.4 and 6.0.14. An additional workaround to mitigate the problem without patching the redis-server executable is to use ACL configuration to prevent clients from using the STRALGO LCS command. On 64 bit systems which have the fixes of CVE-2021-29477 (6.2.3 or 6.0.13), it is sufficient to make sure that the proto-max-bulk-len config parameter is smaller than 2GB (default is 512MB).

Do I need to act?

2.7% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / HIGH complexity

Affected Products (3)

Redis

Fedora

Affected Vendors

Fedoraproject Redislabs

References (10)

Release Notes https://github.com/redis/redis/releases/tag/6.0.14

Release Notes https://github.com/redis/redis/releases/tag/6.2.4

Third Party Advisory https://github.com/redis/redis/security/advisories/GHSA-46cp-x4x9-6pfq

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Release Notes https://github.com/redis/redis/releases/tag/6.0.14

Release Notes https://github.com/redis/redis/releases/tag/6.2.4

Third Party Advisory https://github.com/redis/redis/security/advisories/GHSA-46cp-x4x9-6pfq

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

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moderate-risk

Severity 22/34 · High

Exploitability 6/34 · Minimal

Exposure 9/34 · Low