Google Go up to 1.6 net/http HTTP_PROXY access control

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.9$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Google Go up to 1.6. The impacted element is an unknown function of the component net/http. Executing a manipulation of the argument HTTP_PROXY as part of Environment Variable can lead to access control. This vulnerability appears as CVE-2016-5386. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Google Go up to 1.6 (Programming Language Software). This vulnerability affects an unknown code block of the component net/http. The manipulation of the argument HTTP_PROXY as part of a Environment Variable leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The net/http package in Go through 1.6 does not attempt to address RFC 3875 section 4.1.18 namespace conflicts and therefore does not protect CGI applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect a CGI application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue.

The weakness was presented 07/19/2016 (Website). The advisory is shared for download at kb.cert.org. This vulnerability was named CVE-2016-5386 since 06/10/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 92722 (Scientific Linux Security Update : golang on SL7.x x86_64 (httpoxy)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Scientific Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 11662 (CGI Web Servers Assign Proxy Header Values From Client Vulnerability (HTTPoxy)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 39737.

The vulnerability is also documented in the vulnerability database at Tenable (92722). Additional details are provided at nginx.com. See VDB-89667, VDB-89669 and VDB-89670 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.9

VulDB Base Score: 8.1
VulDB Temp Score: 7.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 92722
Nessus Name: Scientific Linux Security Update : golang on SL7.x x86_64 (httpoxy)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 862505
OpenVAS Name: CentOS Update for golang CESA-2016:1538 centos7
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍
Snort ID: 39737
Snort Message: SERVER-WEBAPP HttpOxy CGI application vulnerability potential man-in-the-middle attempt
Snort Class: 🔍

Timelineinfo

06/10/2016 🔍
07/18/2016 +38 days 🔍
07/19/2016 +1 days 🔍
07/19/2016 +0 days 🔍
08/03/2016 +15 days 🔍
08/04/2016 +1 days 🔍
09/05/2022 +2223 days 🔍

Sourcesinfo

Vendor: google.com

Advisory: RHSA-2016:1538
Status: Not defined

CVE: CVE-2016-5386 (🔍)
GCVE (CVE): GCVE-0-2016-5386
GCVE (VulDB): GCVE-100-89668
CERT: 🔍

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 07/19/2016 10:07
Updated: 09/05/2022 10:40
Changes: 07/19/2016 10:07 (56), 03/02/2019 16:26 (17), 09/05/2022 10:33 (2), 09/05/2022 10:40 (10)
Complete: 🔍
Cache ID: 216:1FE:103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!