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CVE-2021-32625— Redis vulnerability in STRALGO LCS on 32-bit systems

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.

Arch Linux是Arch开源的一个应用系统。一个轻量级且灵活的Linux®发行版，试图使它保持简单。 Arch Linux存在输入验证错误漏洞，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。

CVSS 7.5 · High EPSS 4.14% · P91

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-32625

Vulnerability Information
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Vulnerability Title
Redis vulnerability in STRALGO LCS on 32-bit systems
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 version 6.0 or newer, could be exploited using the STRALGO LCS command to corrupt the heap and potentially result with remote code execution. This is a result of an incomplete fix by CVE-2021-29477. The problem is fixed in version 6.2.4 and 6.0.14. An additional workaround to mitigate the problem without patching the redis-server executable is to use ACL configuration to prevent clients from using the STRALGO LCS command. On 64 bit systems which have the fixes of CVE-2021-29477 (6.2.3 or 6.0.13), it is sufficient to make sure that the proto-max-bulk-len config parameter is smaller than 2GB (default is 512MB).
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
整数溢出导致缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Arch Linux输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Arch Linux是Arch开源的一个应用系统。一个轻量级且灵活的Linux®发行版，试图使它保持简单。 Arch Linux存在输入验证错误漏洞，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。
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 < 6.0.14 -

II. Public POCs for CVE-2021-32625

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III. Intelligence Information for CVE-2021-32625

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Vendor Advisories for CVE-2021-32625 (1)

Mailing List Discussions for CVE-2021-32625 (2)

Other References for CVE-2021-32625 (2)

IV. Related Vulnerabilities

Same product: redis
Same vendor: redis
Same weakness: CWE-680

V. Comments for CVE-2021-32625

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