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amazonAmazonALAS-2016-731
HistoryAug 17, 2016 - 1:30 p.m.

Medium: golang

2016-08-1713:30:00
alas.aws.amazon.com
18

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.236 Low

EPSS

Percentile

96.5%

Issue Overview:

An input-validation flaw was discovered in the Go programming language built in CGI implementation, which set the environment variable “HTTP_PROXY” using the incoming “Proxy” HTTP-request header. The environment variable “HTTP_PROXY” is used by numerous web clients, including Go’s net/http package, to specify a proxy server to use for HTTP and, in some cases, HTTPS requests. This meant that when a CGI-based web application ran, an attacker could specify a proxy server which the application then used for subsequent outgoing requests, allowing a man-in-the-middle attack.

Affected Packages:

golang

Issue Correction:
Run yum update golang to update your system.

New Packages:

i686:  
    golang-bin-1.5.3-1.22.amzn1.i686  
    golang-1.5.3-1.22.amzn1.i686  
  
noarch:  
    golang-docs-1.5.3-1.22.amzn1.noarch  
    golang-src-1.5.3-1.22.amzn1.noarch  
    golang-tests-1.5.3-1.22.amzn1.noarch  
    golang-misc-1.5.3-1.22.amzn1.noarch  
  
src:  
    golang-1.5.3-1.22.amzn1.src  
  
x86_64:  
    golang-1.5.3-1.22.amzn1.x86_64  
    golang-bin-1.5.3-1.22.amzn1.x86_64  

Additional References

Red Hat: CVE-2016-5386

Mitre: CVE-2016-5386

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.236 Low

EPSS

Percentile

96.5%