#VU38145 Input validation error in Go programming language - CVE-2017-1000098

Vulnerability identifier: #VU38145

Vulnerability risk: Medium

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:Green]

CVE-ID: CVE-2017-1000098

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 non-authenticated attacker to perform a denial of service (DoS) attack.

The net/http package's Request.ParseMultipartForm method starts writing to temporary files once the request body size surpasses the given "maxMemory" limit. It was possible for an attacker to generate a multipart request crafted such that the server ran out of file descriptors.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Go programming language: 1.6.3, 1.7.3

---

External links
https://golang.org/cl/30410
https://golang.org/issue/17965
https://groups.google.com/forum/#!msg/golang-dev/4NdLzS8sls8/uIz8QlnIBQAJ

---

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.