#VU16546 Improper input validation in Go programming language - CVE-2018-16875

Vulnerability identifier: #VU16546

Vulnerability risk: Low

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:Clear]

CVE-ID: CVE-2018-16875

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Go programming language
Universal components / Libraries / Scripting languages

Vendor: Google

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists on Go TLS servers accepting client certificates and TLS clients due to the crypto/x509 package does not limit the amount of work performed for each chain verification. A remote unauthenticated attacker can craft pathological inputs leading to a CPU denial of service.

Mitigation
The vulnerability has been fixed in the version 1.10.6, 1.11.3.

Vulnerable software versions

Go programming language: 1.0 - 1.0.3, 1.1.0 - 1.11.2, 1.2 - 1.2.2, 1.3 - 1.3.3, 1.4 - 1.4.3, 1.5 - 1.5.4, 1.6 - 1.6.4, 1.7 - 1.7.6, 1.8 - 1.8.7, 1.9 - 1.9.7

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External links
https://github.com/golang/go/issues/29233

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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.