Microsoft Silverlight up to 5.1.20513.0 Access Protection input validation

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.
5.4$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Microsoft Silverlight up to 5.1.20513.0. Affected by this issue is some unknown functionality of the component Access Protection. The manipulation leads to input validation. This vulnerability is traded as CVE-2013-3896. Furthermore, there is an exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Microsoft Silverlight up to 5.1.20513.0 (Multimedia Player Software). This issue affects some unknown functionality of the component Access Protection. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality. The summary by CVE is:

Microsoft Silverlight 5 before 5.1.20913.0 does not properly validate pointers during access to Silverlight elements, which allows remote attackers to obtain sensitive information via a crafted Silverlight application, aka "Silverlight Vulnerability."

The weakness was shared 10/08/2013 by Vitaliy Toropov as MS13-087 as confirmed bulletin (Technet). The advisory is shared at technet.microsoft.com. The vendor cooperated in the coordination of the public release. The identification of this vulnerability is CVE-2013-3896 since 06/03/2013. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

The exploit is available at exploit-db.com. It is declared as attacked. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 70341 (MS13-087: Vulnerability in Silverlight Could Allow Information Disclosure (2890788) (Mac OS X)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90911 (Microsoft Silverlight Information Disclosure Vulnerability (MS13-087)). The CISA Known Exploited Vulnerabilities Catalog lists this issue since 05/25/2022 with a due date of 06/15/2022:

The impacted product is end-of-life and should be disconnected if still in use.

Applying the patch MS13-087 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 13505.

The vulnerability is also documented in the databases at Exploit-DB (41702), Tenable (70341), SecurityFocus (BID 62793†), OSVDB (98223†) and Vulnerability Center (SBV-41838†). technet.microsoft.com is providing further details. Several companies clearly confirm that VulDB is the primary source for best 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: 5.4
VulDB Meta Temp Score: 5.4

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

NVD Base Score: 5.5
NVD Vector: 🔍

ADP CISA Base Score: 5.5
ADP CISA Vector: 🔍

CVSSv2info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 70341
Nessus Name: MS13-087: Vulnerability in Silverlight Could Allow Information Disclosure (2890788) (Mac OS X)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 902987
OpenVAS Name: Microsoft Silverlight Information Disclosure Vulnerability-2890788 (Mac OS X)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: ms13_022_silverlight_script_object.rb
MetaSploit Name: MS12-022 Microsoft Silverlight ScriptObject Unsafe Memory Access
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: MS13-087
TippingPoint: 🔍

McAfee IPS Version: 🔍

Fortigate IPS: 🔍

Timelineinfo

06/03/2013 🔍
08/10/2013 +68 days 🔍
10/08/2013 +58 days 🔍
10/08/2013 +0 days 🔍
10/08/2013 +0 days 🔍
10/09/2013 +1 days 🔍
10/09/2013 +0 days 🔍
10/09/2013 +0 days 🔍
10/11/2013 +2 days 🔍
04/22/2026 +4576 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS13-087
Researcher: Vitaliy Toropov
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2013-3896 (🔍)
GCVE (CVE): GCVE-0-2013-3896
GCVE (VulDB): GCVE-100-10649

OVAL: 🔍
IAVM: 🔍

SecurityFocus: 62793
OSVDB: 98223
Vulnerability Center: 41838 - [MS13-087] Microsoft Silverlight and Silverlight Developer Runtime Remote Information Disclosure Vulnerability, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍

Entryinfo

Created: 10/11/2013 10:07
Updated: 04/22/2026 14:47
Changes: 10/11/2013 10:07 (48), 05/13/2017 09:37 (39), 05/26/2021 14:42 (4), 05/26/2021 14:43 (1), 04/26/2024 14:29 (24), 06/28/2024 21:59 (13), 09/09/2024 22:30 (1), 06/08/2025 05:18 (3), 04/22/2026 14:47 (10)
Complete: 🔍
Committer:
Cache ID: 216::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 ▸

Might our Artificial Intelligence support you?

Check our Alexa App!