ASA-202009-2

gistfile1.txt

Subject: [ASA-202009-2] go: cross-site scripting

Arch Linux Security Advisory ASA-202009-2
=========================================

Severity: TBD
Date    : 2020-09-02
CVE-ID  : CVE-2020-24553
Package : go
Type    : cross-site scripting
Remote  : Yes
Link    : https://security.archlinux.org/AVG-1215

Summary
=======

The package go before versions 1.15.1 and 1.14.8 is vulnerable to cross-site
scripting.

Resolution
==========

Upgrade to 1.15.1.

# pacman -Syu "go>=1.15.1-1"

The problem has been fixed upstream in versions 1.15.1 and 1.14.8.

Workaround
==========

None.

Description
===========

Go versions before 1.15.1 and 1.14.8 have improper Content-Type header
validation of Handlers when the Content-Type header was not explicitly set
causing the net/http/cgi and net/http/fcgi packages to default to “text/html”.
This can cause a Cross-Site Scripting vulnerability when an attacker can control
any part of the contents of a response.

Impact
======


References
==========

https://github.com/golang/go/issues/40928
https://www.redteam-pentesting.de/advisories/rt-sa-2020-004
https://groups.google.com/g/golang-announce/c/8wqlSbkLdPs/m/UccMwBPUBAAJ
https://github.com/golang/go/commit/eb07103a083237414145a45f029c873d57037e06