PEAR HTTP_Upload v1.0.0b3 Upload.php privileges management

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.
6.6	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in PEAR HTTP_Upload v1.0.0b3. This vulnerability affects unknown code of the file Upload.php. The manipulation leads to privileges management. The attack is possible to be carried out remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability, which was classified as critical, has been found in PEAR HTTP_Upload v1.0.0b3. This issue affects some unknown functionality of the file Upload.php. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 01/26/2017 by John Page (hyp3rlinx) as PEAR HTTP_Upload v1.0.0b3 Arbitrary File Upload as not defined mailinglist post (Bugtraq). The advisory is shared at seclists.org. The mailinglist post contains:

Similar bug reported and open 2012

The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1068 for this issue. The following code is the reason for this vulnerability:

var $_extensionsCheck = array('php', 'phtm', 'phtml', 'php3', 'inc');

The advisory points out:

Therefore, attackers can easily bypass the security check by appending ".1" to end of the file, which can result in arbitrary command execution on the affected server.

A public exploit has been developed by John Page 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 26 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:Upload.php it is possible to find vulnerable targets with Google Hacking. The code used by the exploit is:

ext_bypass.php.1

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (41159). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• PEAR

Name

• HTTP_Upload

Version

• v1.0.0b3

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: John Page
Download: 🔍
Google Hack: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

12/31/2016 🔍
01/26/2017 +26 days 🔍
01/26/2017 +0 days 🔍
01/26/2017 +0 days 🔍
01/27/2017 +1 days 🔍
08/04/2020 +1285 days 🔍

Sourcesinfo

Advisory: PEAR HTTP_Upload v1.0.0b3 Arbitrary File Upload
Researcher: John Page (hyp3rlinx)
Status: Not defined

GCVE (VulDB): GCVE-100-96077
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/27/2017 14:44
Updated: 08/04/2020 20:30
Changes: 01/27/2017 14:44 (51), 08/04/2020 20:30 (2)
Complete: 🔍
Cache ID: 216::103

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

Discussion

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