#VU89623 Allocation of Resources Without Limits or Throttling in Puma - CVE-2019-16770

Vulnerability identifier: #VU89623

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-2019-16770

CWE-ID: CWE-770

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Puma
Server applications / Web servers

Vendor: Evan Phoenix

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to poorly-behaved client could use keepalive requests to monopolize Puma's reactor and create a denial of service attack. A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Puma: before 3.12.2, 4.3.1, 3.12.2, 3.12.2

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External links
https://github.com/puma/puma/security/advisories/GHSA-7xx3-m584-x994
https://lists.debian.org/debian-lts-announce/2022/05/msg00034.html

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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.