Zend Framework up to 2.4.8 Private Key array_rand $padding key 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.
6.1$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Zend Framework up to 2.4.8. This issue affects the function array_rand of the component Private Key. This manipulation of the argument $padding causes key management (Key). This vulnerability is tracked as CVE-2015-7503. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Zend Framework up to 2.4.8 (Programming Tool Software) and classified as problematic. Affected by this vulnerability is the function array_rand of the component Private Key. The manipulation of the argument $padding with an unknown input leads to a key management vulnerability (Key). The CWE definition for the vulnerability is CWE-320. As an impact it is known to affect confidentiality. The summary by CVE is:

Zend Framework before 2.4.9, zend-framework/zend-crypt 2.4.x before 2.4.9, and 2.5.x before 2.5.2 allows remote attackers to recover the RSA private key.

The bug was discovered 11/23/2015. The weakness was disclosed 10/10/2017 as Bug 1283137 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2015-7503 since 09/29/2015. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 211 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 92053 (Fedora 22 : php-ZendFramework2 / php-zendframework-zendxml (2016-03c0ed3127)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l.

Upgrading to version 2.4.9 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (92053). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

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

NVD Base Score: 🔍

Exploitinginfo

Name: Key
Class: Key management / Key
CWE: CWE-320
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: 92053
Nessus Name: Fedora 22 : php-ZendFramework2 / php-zendframework-zendxml (2016-03c0ed3127)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for php-ZendFramework2 FEDORA-2016-8952105d59
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Zend Framework 2.4.9

Timelineinfo

09/29/2015 🔍
11/23/2015 +55 days 🔍
06/21/2016 +211 days 🔍
07/14/2016 +23 days 🔍
10/10/2017 +453 days 🔍
10/10/2017 +0 days 🔍
10/11/2017 +1 days 🔍
11/23/2019 +773 days 🔍

Sourcesinfo

Advisory: Bug 1283137
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-7503 (🔍)
GCVE (CVE): GCVE-0-2015-7503
GCVE (VulDB): GCVE-100-107617

Entryinfo

Created: 10/11/2017 10:11
Updated: 11/23/2019 08:55
Changes: 10/11/2017 10:11 (74), 11/23/2019 08:55 (3)
Complete: 🔍
Cache ID: 216:14E:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!