CVE-2021-29477 Vulnerability in the STRALGO LCS command

2021-05-0415:15:17

CWE-190

GitHub_M

www.cve.org

cve-2021-29477

integer overflow

redis

stralgo lcs

heap corruption

remote code execution

version 6.0

version 6.2.3

version 6.0.13

acl configuration

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

9.2

Confidence

High

EPSS

0.019

Percentile

88.7%

JSON

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.

CNA Affected

[
  {
    "product": "redis",
    "vendor": "redis",
    "versions": [
      {
        "status": "affected",
        "version": ">= 6.2.0, < 6.2.3"
      },
      {
        "status": "affected",
        "version": ">= 6.0.0, < 6.0.13"
      }
    ]
  }
]