CVE-2021-32625 Redis vulnerability in STRALGO LCS on 32-bit systems

2021-06-0219:35:11

CWE-680

GitHub_M

www.cve.org

7.5 High

CVSS3

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

9.3 High

AI Score

Confidence

High

0.019 Low

EPSS

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. 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).

CNA Affected

[
  {
    "product": "redis",
    "vendor": "redis",
    "versions": [
      {
        "status": "affected",
        "version": "< 6.0.14"
      },
      {
        "status": "affected",
        "version": ">= 6.2.0, < 6.2.4"
      }
    ]
  }
]