Denial of service when processing X.509 certificate chain in Go programming language



Published: 2019-10-21
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-17596
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Go programming language
Universal components / Libraries / Scripting languages

Vendor Google

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU22020

Risk: Medium

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-2019-17596

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of DSA public keys in crypto/x509.Verify. A remote attacker can pass a specially crafted X.509 certificate chain to the application and perform a denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Go programming language: 1.12 - 1.13.2

External links

http://github.com/golang/go/issues/34960


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.



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