#VU76423 Input validation error in c-ares - CVE-2023-32067

Vulnerability identifier: #VU76423

Vulnerability risk: Medium

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

CVE-ID: CVE-2023-32067

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
c-ares
Universal components / Libraries / Libraries used by multiple products

Vendor: c-ares.haxx.se

Description

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

c-ares: 1.0.0 - 1.19.0

---

External links
https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1
https://github.com/c-ares/c-ares/security/advisories/GHSA-9g78-jv2r-p7vc

---

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.