Input validation error in Redis

1) Input validation error

EUVDB-ID: #VU30255

Risk: Medium

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

CVE-ID: CVE-2020-14147

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows context-dependent attackers with permission to run Lua code in a Redis session to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (memory corruption and application crash) or possibly bypass intended sandbox restrictions via a large number, which triggers a stack-based buffer overflow.

Mitigation

Update to version 6.0.3.

Vulnerable software versions

Redis: 6.0.0 - 6.0.2

CPE2.3

• cpe:2.3:a:salvatore_sanfilippo:redis:6.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:salvatore_sanfilippo:redis:6.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:salvatore_sanfilippo:redis:6.0.2:*:*:*:*:*:*:*

External links

https://github.com/antirez/redis/commit/ef764dde1cca2f25d00686673d1bc89448819571
https://github.com/antirez/redis/pull/6875

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.