1) Integer overflow

Risk: High

CVSSv3: 7.1 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-21309

CWE-ID: CWE-190 - Integer Overflow or Wraparound

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow on 32-bit systems. A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Redis: 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6, 4.0.7, 4.0.8, 4.0.9, 4.0.10, 4.0.11, 4.0.12, 4.0.13, 4.0.14, 5.0.0, 5.0.1, 5.0.2, 5.0.3, 5.0.4, 5.0.5, 5.0.6, 5.0.7, 5.0.8, 5.0.9, 5.0.10, 6.0.0, 6.0.1, 6.0.2, 6.0.3, 6.0.4, 6.0.5, 6.0.6, 6.0.7, 6.0.8, 6.0.9, 6.0.10

CPE

• cpe:/a:redis_labs:redis:6.0.10:
• cpe:/a:redis_labs:redis:6.0.9:
• cpe:/a:redis_labs:redis:6.0.8:
• cpe:/a:redis_labs:redis:6.0.7:
• cpe:/a:redis_labs:redis:6.0.6:
• cpe:/a:redis_labs:redis:6.0.5:
• cpe:/a:redis_labs:redis:6.0.4:
• cpe:/a:redis_labs:redis:6.0.3:
• cpe:/a:redis_labs:redis:6.0.2:
• cpe:/a:redis_labs:redis:6.0.1:
• cpe:/a:redis_labs:redis:6.0.0:
• cpe:/a:redis_labs:redis:5.0.10:
• cpe:/a:redis_labs:redis:5.0.9:
• cpe:/a:redis_labs:redis:5.0.8:
• cpe:/a:redis_labs:redis:5.0.7:
• cpe:/a:redis_labs:redis:5.0.6:
• cpe:/a:redis_labs:redis:5.0.5:
• cpe:/a:redis_labs:redis:5.0.4:
• cpe:/a:redis_labs:redis:5.0.3:
• cpe:/a:redis_labs:redis:5.0.2:
• cpe:/a:redis_labs:redis:5.0.1:
• cpe:/a:redis_labs:redis:5.0.0:
• cpe:/a:redis_labs:redis:4.0.14:
• cpe:/a:redis_labs:redis:4.0.13:
• cpe:/a:redis_labs:redis:4.0.12:
• cpe:/a:redis_labs:redis:4.0.11:
• cpe:/a:redis_labs:redis:4.0.10:
• cpe:/a:redis_labs:redis:4.0.9:
• cpe:/a:redis_labs:redis:4.0.8:
• cpe:/a:redis_labs:redis:4.0.7:
• cpe:/a:redis_labs:redis:4.0.6:
• cpe:/a:redis_labs:redis:4.0.5:
• cpe:/a:redis_labs:redis:4.0.4:
• cpe:/a:redis_labs:redis:4.0.3:
• cpe:/a:redis_labs:redis:4.0.2:
• cpe:/a:redis_labs:redis:4.0.1:
• cpe:/a:redis_labs:redis:4.0.0:

External links

https://github.com/redis/redis/releases/tag/6.2.0
https://github.com/redis/redis/releases/tag/5.0.11

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.