Vulnerability identifier: #VU66152

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-46828

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libtirpc
Universal components / Libraries / Libraries used by multiple products

Vendor: linux-nfs.org

Description

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

The vulnerability exists due to library improperly handles idle TCP connections. A remote attacker can exhaust the file descriptors of a process that uses libtirpc and perform a denial of service (DoS)  attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libtirpc: 0.1.8 - 1.3.2

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External links
http://git.linux-nfs.org/?p=steved/libtirpc.git;a=commit;h=86529758570cef4c73fb9b9c4104fdc510f701ed

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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.