CVE-2021-32687 Integer overflow issue with intsets in Redis

2021-10-0417:55:10

CWE-680

CWE-190

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

8.6 High

AI Score

Confidence

High

0.005 Low

EPSS

Percentile

77.5%

JSON

Redis is an open source, in-memory database that persists on disk. An integer overflow bug affecting all versions of Redis can be exploited to corrupt the heap and potentially be used to leak arbitrary contents of the heap or trigger remote code execution. The vulnerability involves changing the default set-max-intset-entries configuration parameter to a very large value and constructing specially crafted commands to manipulate sets. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14. An additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the set-max-intset-entries configuration parameter. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.

CNA Affected

[
  {
    "product": "redis",
    "vendor": "redis",
    "versions": [
      {
        "status": "affected",
        "version": "< 5.0.14"
      },
      {
        "status": "affected",
        "version": ">= 6.0.0, < 6.0.16"
      },
      {
        "status": "affected",
        "version": ">= 6.2.0, < 6.2.6"
      }
    ]
  }
]