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CVE-2021-32627— Integer overflow issue with Streams in Redis

Quick assessment

Affected
redis redis
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Redis Labs Redis是美国Redis Labs公司的一套开源的使用ANSI C编写、支持网络、可基于内存亦可持久化的日志型、键值（Key-Value）存储数据库，并提供多种语言的API。 Redis 存在输入验证错误漏洞，该漏洞可能导致远程代码执行。

CVSS 7.5 · High EPSS 3.93% · P90

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-32627

Vulnerability Information
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Vulnerability Title
Integer overflow issue with Streams in Redis
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Redis Labs Redis 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Redis Labs Redis是美国Redis Labs公司的一套开源的使用ANSI C编写、支持网络、可基于内存亦可持久化的日志型、键值（Key-Value）存储数据库，并提供多种语言的API。 Redis 存在输入验证错误漏洞，该漏洞可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
redis redis >= 5.0.0, < 5.0.14 -

II. Public POCs for CVE-2021-32627

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III. Intelligence Information for CVE-2021-32627

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Patches & Fixes for CVE-2021-32627 (1)

Vendor Advisories for CVE-2021-32627 (5)

Mailing List Discussions for CVE-2021-32627 (3)

Same Patch Batch · redis · 2021-10-04 · 9 CVEs total

CVE-2021-32765 8.8 HIGH Integer Overflow to Buffer Overflow in Hiredis
CVE-2021-32626 7.5 HIGH Lua scripts can overflow the heap-based Lua stack in Redis
CVE-2021-32628 7.5 HIGH Vulnerability in handling large ziplists
CVE-2021-32675 7.5 HIGH DoS vulnerability in Redis
CVE-2021-32687 7.5 HIGH Integer overflow issue with intsets in Redis
CVE-2021-32762 7.5 HIGH Integer overflow that can lead to heap overflow in redis-cli, redis-sentinel on some platf
CVE-2021-41099 7.5 HIGH Integer overflow issue with strings in Redis
CVE-2021-32672 5.3 MEDIUM Vulnerability in Lua Debugger in Redis

IV. Related Vulnerabilities

Same product: redis
Same vendor: redis
Same weakness: CWE-190

V. Comments for CVE-2021-32627

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