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CVE-2021-29478— Vulnerability in the COPY command for large intsets

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 存在输入验证错误漏洞，该漏洞源于针对大型intsets的COPY命令中存在整数溢出。远程攻击者可利用该漏洞可以将专门设计的数据传递给应用程序，触发整数溢出，并在目标系统上执行任意代码。以下产品和版本的影响:Redis: 2.6.0, 2.6.1, 2.6.2, 2.6.3, 2.6.4, 2.6.

CVSS 7.5 · High EPSS 3.61% · P89

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-29478

Vulnerability Information
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Vulnerability Title
Vulnerability in the COPY command for large intsets
Source: CVE Program / CVE List V5
Vulnerability Description
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 6.2 before 6.2.3 could be exploited to corrupt the heap and potentially result with remote code execution. Redis 6.0 and earlier are not directly affected by this issue. The problem is fixed in version 6.2.3. 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.
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，该漏洞源于针对大型intsets的COPY命令中存在整数溢出。远程攻击者可利用该漏洞可以将专门设计的数据传递给应用程序，触发整数溢出，并在目标系统上执行任意代码。以下产品和版本的影响:Redis: 2.6.0, 2.6.1, 2.6.2, 2.6.3, 2.6.4, 2.6.
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 >= 6.2.0, < 6.2.3 -

II. Public POCs for CVE-2021-29478

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III. Intelligence Information for CVE-2021-29478

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Vendor Advisories for CVE-2021-29478 (1)

Mailing List Discussions for CVE-2021-29478 (1)

Vendor Pages for CVE-2021-29478 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2021-29478

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