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CVE-2021-32672— Vulnerability in Lua Debugger in Redis

Quick assessment

Affected
redis redis
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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 存在缓冲区错误漏洞，当使用Redis Lua调试器时，用户可以发送错误的请求，导致调试器的协议解析器读取超出实际缓冲区的数据。

CVSS 5.3 · Medium EPSS 1.79% · P78

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-32672

Vulnerability Information
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Vulnerability Title
Vulnerability in Lua Debugger in Redis
Source: CVE Program / CVE List V5
Vulnerability Description
Redis is an open source, in-memory database that persists on disk. When using the Redis Lua Debugger, users can send malformed requests that cause the debugger’s protocol parser to read data beyond the actual buffer. This issue affects all versions of Redis with Lua debugging support (3.2 or newer). The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Redis Labs Redis 缓冲区错误漏洞
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 存在缓冲区错误漏洞，当使用Redis Lua调试器时，用户可以发送错误的请求，导致调试器的协议解析器读取超出实际缓冲区的数据。
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 >= 3.2.0, < 5.0.14 -

II. Public POCs for CVE-2021-32672

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III. Intelligence Information for CVE-2021-32672

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Patches & Fixes for CVE-2021-32672 (1)

Vendor Advisories for CVE-2021-32672 (5)

Mailing List Discussions for CVE-2021-32672 (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-2021-32627 7.5 HIGH Integer overflow issue with Streams 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

IV. Related Vulnerabilities

Same product: redis
Same vendor: redis
Same weakness: CWE-125

V. Comments for CVE-2021-32672

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