#VU31891 Race condition in Go programming language - CVE-2020-15586

Vulnerability identifier: #VU31891

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-15586

CWE-ID: CWE-362

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 perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition in some net/http servers, as demonstrated by the httputil.ReverseProxy Handler. A remote attacker can exploit the race and cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Go programming language: 1.13 - 1.14.4

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External links
https://lists.opensuse.org/opensuse-security-announce/2020-07/msg00077.html
https://groups.google.com/forum/#!topic/golang-announce/f2c5bqrGH_g
https://groups.google.com/forum/#!topic/golang-announce/XZNfaiwgt2w
https://www.cloudfoundry.org/blog/cve-2020-15586/

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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.