CVE-2021-29477

HIGH

Published 2021-05-04T15:15:17

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CVSS Score

V3.1

7.5

/10

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Base Score Metrics

Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14

0.020

probability

of exploitation in the wild

There is a 2.0% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25

Exploit Probability

Percentile: 0.830

Higher than 83.0% of all CVEs

Attack Vector Metrics

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Impact Metrics

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

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. The problem is fixed in version 6.2.3 and 6.0.13. 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.