Skype Client 5.x on Mac Message Processor memory corruption

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-$5k0.00

Summaryinfo

A vulnerability was found in Skype Client 5.x on Mac. It has been declared as problematic. Affected by this issue is some unknown functionality of the component Message Processor. Such manipulation leads to memory corruption. This vulnerability is documented as CVE-2011-2074. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Skype Client 5.x on Mac (Unified Communication Software). It has been rated as critical. Affected by this issue is some unknown processing of the component Message Processor. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Unspecified vulnerability in the client in Skype 5.x before 5.1.0.922 on Mac OS X allows remote authenticated users to execute arbitrary code or cause a denial of service (application crash) via a crafted message.

The weakness was released 05/09/2011 by Gordon Maddern with Pure Hacking (Website). The advisory is available at blogs.skype.com. This vulnerability is handled as CVE-2011-2074 since 05/10/2011. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 53845 (Skype for Mac 5.x < 5.1.0.922 Unspecified Remote Code Execution (uncredentialed check)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r.

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at blogs.skype.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (67324), Tenable (53845), SecurityFocus (BID 47747†), Secunia (SA44522†) and Vulnerability Center (SBV-31326†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

Version

License

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

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 53845
Nessus Name: Skype for Mac 5.x < 5.1.0.922 Unspecified Remote Code Execution (uncredentialed check)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: blogs.skype.com

Timelineinfo

04/14/2011 🔍
05/06/2011 +22 days 🔍
05/06/2011 +0 days 🔍
05/08/2011 +2 days 🔍
05/09/2011 +1 days 🔍
05/09/2011 +0 days 🔍
05/10/2011 +1 days 🔍
05/10/2011 +0 days 🔍
05/19/2011 +9 days 🔍
03/19/2021 +3592 days 🔍

Sourcesinfo

Advisory: blogs.skype.com
Researcher: Gordon Maddern
Organization: Pure Hacking
Status: Not defined
Confirmation: 🔍

CVE: CVE-2011-2074 (🔍)
GCVE (CVE): GCVE-0-2011-2074
GCVE (VulDB): GCVE-100-4346
X-Force: 67324
SecurityFocus: 47747 - Skype Technologies Skype for Mac Unspecified Remote Code Execution Vulnerability
Secunia: 44522 - Skype for Mac Message Processing Code Execution Vulnerability, Moderately Critical
Vulnerability Center: 31326 - Skype for Mac 5 through 5.1.0.921 Remote Arbitrary Code Execution Vulnerability, Medium
Vupen: ADV-2011-1192

Entryinfo

Created: 05/19/2011 02:00
Updated: 03/19/2021 10:02
Changes: 05/19/2011 02:00 (74), 03/22/2017 09:38 (8), 03/19/2021 10:02 (3)
Complete: 🔍
Cache ID: 216:EDF:103

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!