#VU78506 Heap-based buffer overflow in Redis - CVE-2022-24834

Vulnerability identifier: #VU78506

Vulnerability risk: Medium

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

CVE-ID: CVE-2022-24834

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Redis
Server applications / Database software

Vendor: Redis Labs

Description

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

The vulnerability exists due to a boundary error within the cjson and cmsgpack libraries. A remote attacker can trick the victim into using a specially crafted Lua script to trigger a heap-based buffer 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: 6.0.0 - 6.0.19, 6.2.0 - 6.2.12, 7.0.0 - 7.0.11

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External links
https://github.com/redis/redis/security/advisories/GHSA-p8x2-9v9q-c838
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TDNNH2ONMVNBQ6LUIAOAGDNFPKXNST5K/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MIF5MAGYARYUMRFK7PQI7HYXMK2HZE5T/

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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. However, proof of concept for this vulnerability is available.