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.
9.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Valve Steam Client. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the component Friend Message Handler. Performing a manipulation results in memory corruption. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Valve Steam Client. It has been classified as critical. This affects an unknown function of the component Friend Message Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was shared 10/30/2013 by Arnaud Dovi with Zero Day Initiative as Steam Client Update Released as confirmed advisory (Website). It is possible to read the advisory at store.steampowered.com. The vendor cooperated in the coordination of the public release. The exploitability is told to be difficult. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version Releasedate October 30th. 2013 or or later eliminates this vulnerability. The upgrade is hosted for download at store.steampowered.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at OSVDB (100341†) and Secunia (SA55846†). Further details are available at zerodayinitiative.com. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Valve

Name

• Steam Client

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
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: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Steam Client Releasedate October 30th. 2013/or later

Timelineinfo

10/30/2013 🔍
10/30/2013 +0 days 🔍
11/25/2013 +26 days 🔍
11/29/2013 +4 days 🔍
03/25/2019 +1942 days 🔍

Sourcesinfo

Advisory: Steam Client Update Released
Researcher: Arnaud Dovi
Organization: Zero Day Initiative
Status: Confirmed
Coordinated: 🔍

GCVE (VulDB): GCVE-100-11319
Secunia: 55846 - Steam Client Chat Messages Handling Arbitrary Code Execution Vulnerability, Moderately Critical
OSVDB: 100341

Misc.: 🔍

Entryinfo

Created: 11/29/2013 09:17
Updated: 03/25/2019 15:20
Changes: 11/29/2013 09:17 (51), 03/25/2019 15:20 (1)
Complete: 🔍
Committer:
Cache ID: 216:EBD:103

Discussion

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