Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Network
0

CVE-2021-32627

Disclosure Date: October 04, 2021 •
CVE-2021-32627 CVSS v3 Base Score: 7.5
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

Redis is an open source, in-memory database that persists on disk. In affected versions an integer overflow bug in Redis can be exploited to corrupt the heap and potentially result with remote code execution. The vulnerability involves changing the default proto-max-bulk-len and client-query-buffer-limit configuration parameters to very large values and constructing specially crafted very large stream elements. The problem is fixed in Redis 6.2.6, 6.0.16 and 5.0.14. For users unable to upgrade an additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the proto-max-bulk-len configuration parameter. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.

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CVSS V3 Severity and Metrics
Base Score:
7.5 High
Impact Score:
5.9
Exploitability Score:
1.6
Vector:
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
High
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
redis >= 5.0.0, < 5.0.14
redis >= 6.0.0, < 6.0.16
redis >= 6.2.0, < 6.2.6
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • debian,
  • fedoraproject,
  • netapp,
  • oracle,
  • redis

Products

  • communications operations monitor 4.3,
  • communications operations monitor 4.4,
  • communications operations monitor 5.0,
  • debian linux 10.0,
  • debian linux 11.0,
  • fedora 33,
  • fedora 34,
  • fedora 35,
  • management services for element software -,
  • management services for netapp hci -,
  • redis
Technical Analysis