Remote denial of service in Redis

1) Resource management error

EUVDB-ID: #VU107885

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-21605

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources within the application when handling output buffers. A remote attacker can cause the output buffer to grow from "NOAUTH" responses until the system will run out of memory.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Redis: 2.6.0 - 7.4.2

CPE2.3

• cpe:2.3:a:redis_labs:redis:2.6.17:*:*:*:*:*:*:*
• cpe:2.3:a:redis_labs:redis:2.8.24:*:*:*:*:*:*:*
• cpe:2.3:a:redis_labs:redis:3.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:redis_labs:redis:3.2.13:*:*:*:*:*:*:*
• cpe:2.3:a:redis_labs:redis:4.0.14:*:*:*:*:*:*:*
• cpe:2.3:a:redis_labs:redis:5.0.14:*:*:*:*:*:*:*
• cpe:2.3:a:redis_labs:redis:6.0.20:*:*:*:*:*:*:*
• cpe:2.3:a:redis_labs:redis:6.2.17:*:*:*:*:*:*:*
• cpe:2.3:a:redis_labs:redis:7.0.15:*:*:*:*:*:*:*
• cpe:2.3:a:redis_labs:redis:7.2.7:*:*:*:*:*:*:*

External links

https://github.com/redis/redis/security/advisories/GHSA-r67f-p999-2gff

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.