Denial of service in etcd

1) Out-of-bounds write

EUVDB-ID: #VU92385

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 - Out-of-bounds write

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:etcd-io:etcd:3.5.0:*:*:*:*:*:*:*
• cpe:2.3:a:etcd-io:etcd:3.5.1:*:*:*:*:*:*:*
• cpe:2.3:a:etcd-io:etcd:3.5.2:*:*:*:*:*:*:*

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

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.