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CVE-2021-32625

Redis vulnerability in STRALGO LCS on 32-bit systems

HIGH
8.8
CVSS Score
Published: June 2, 2021 at 07:35 PM UTC
Updated: June 17, 2026 at 03:53 AM UTC
2 products affected across 2 vendorsFedoraRedis

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Severity
HIGH8.8
Exploit prediction
EPSS 4%

Description

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).

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
3334
Redis· Redis
95%
v < 6.0.14v < 6.2.46.0.0 ≤ v < 6.0.146.2.0 ≤ v < 6.2.4
Affected range stops below 6.0.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.2.4, so it looks safe — our inference, not a vendor statement

References (5)

x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/redis/redis/releases/tag/6.0.14
x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/redis/redis/releases/tag/6.2.4
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://github.com/redis/redis/security/advisories/GHSA-46cp-x4x9-6pfq
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BHWOF7CBVUGDK3AN6H3BN3VNTH2TDUZZ/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SN7INTZFE34MIQJO7WDDTIY5LIBGN6GI/

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-680CWE-190

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