Vulnerability identifier: #VU14577

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-14622

CWE-ID: CWE-476

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 cause DoS condition on the target system.

The vulnerability exists due to boundary error when checking the return value of the makefd_xprt() function, as defined in the svc_vc.csource code. A remote attacker can flood a targeted system with new connections, exhaust the maximum number of available file descriptors, trigger NULL pointer dereference and cause the affected software to terminate abnormally.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libtirpc: 0.3.0 - 1.0.3

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External links
http://git.linux-nfs.org/?p=steved/libtirpc.git;a=commit;h=1c77f7a869bdea2a34799d774460d1f9983d45f0

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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.