#VU92385 Out-of-bounds write in etcd - CVE-2022-34038

Vulnerability identifier: #VU92385

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-34038

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
etcd
Server applications / Database software

Vendor: etcd-io

Description

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

The vulnerability exists due to a boundary error within the PageWriter.write() method in pagewriter.go. A remote attacker can create a specially crafted input to the application, trigger an out-of-bounds write and perform a denial of service (DoS) attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability..

Vulnerable software versions

etcd: 3.5.0 - 3.5.4

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External links
https://github.com/etcd-io/etcd/pull/14022
https://github.com/etcd-io/etcd/pull/14452
https://go-review.googlesource.com/c/vulndb/+/524456/2/data/excluded/GO-2023-2016.yaml
https://github.com/golang/vulndb/issues/2016#issuecomment-1698677762
https://go-review.googlesource.com/c/vulndb/+/524456
https://github.com/advisories/GHSA-65rp-cv85-263x

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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.