#VU30255 Input validation error in Redis - CVE-2020-14147

Vulnerability identifier: #VU30255

Vulnerability 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

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Redis
Server applications / Database software

Vendor: Salvatore Sanfilippo

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

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

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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