#VU51876 Resource exhaustion in Jetty - CVE-2021-28165

Vulnerability identifier: #VU51876

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-2021-28165

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Jetty
Server applications / Web servers

Vendor: Eclipse

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources when processing large TLS frames. A remote attacker can send specially crafted data to the server, trigger CPU high load and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Jetty: 7.2.2.v20101201 - 7.6.21, 8.0.0.v20110901 - 8.4.1, 9.0.0.v20130308 - 9.4.38.v20210224, 10.0.0 - 11.0.1

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External links
https://github.com/eclipse/jetty.project/security/advisories/GHSA-26vr-8j45-3r4w
https://bugs.eclipse.org/bugs/show_bug.cgi?id=572218

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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.