Skype up to 3.8.0.95 input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.0$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Skype up to 3.8.0.95. This issue affects some unknown processing. The manipulation leads to input validation. This vulnerability is referenced as CVE-2008-2545. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Skype up to 3.8.0.95 (Unified Communication Software). It has been rated as critical. This issue affects some unknown functionality. 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, integrity, and availability. The summary by CVE is:

Skype 3.6.0.248, and other versions before 3.8.0.139, uses a case-sensitive comparison when checking for dangerous extensions, which allows user-assisted remote attackers to bypass warning dialogs and possibly execute arbitrary code via a file: URI with a dangerous extension that uses a different case.

The bug was discovered 06/04/2008. The weakness was published 06/06/2008 by Ismael Briones (Website). It is possible to read the advisory at skype.com. The identification of this vulnerability is CVE-2008-2545 since 06/04/2008. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 33125 (Skype file: URI Handling Security Bypass Arbitrary Code Execution (uncredentialed check)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows and running in the context r.

Upgrading to version 3.8.0.96 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (43044), Tenable (33125), SecurityFocus (BID 29553†), OSVDB (46010†) and Secunia (SA30547†). Similar entry is available at VDB-42692. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 33125
Nessus Name: Skype file: URI Handling Security Bypass Arbitrary 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: 🔍

Upgrade: Skype 3.8.0.96

Timelineinfo

06/04/2008 🔍
06/04/2008 +0 days 🔍
06/04/2008 +0 days 🔍
06/04/2008 +0 days 🔍
06/06/2008 +2 days 🔍
06/06/2008 +0 days 🔍
06/06/2008 +0 days 🔍
06/06/2008 +0 days 🔍
06/16/2008 +10 days 🔍
03/16/2015 +2464 days 🔍
08/11/2019 +1609 days 🔍

Sourcesinfo

Advisory: skype.com
Researcher: Ismael Briones
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2008-2545 (🔍)
GCVE (CVE): GCVE-0-2008-2545
GCVE (VulDB): GCVE-100-42695

OVAL: 🔍

X-Force: 43044
SecurityFocus: 29553 - Skype 'file://' URI Handler Bypass Remote Code Execution Vulnerability
Secunia: 30547
OSVDB: 46010 - Skype file: URI handler case-sensitive comparison security bypass
SecurityTracker: 1020201
Vulnerability Center: 18615 - Skype Vulnerability Allows User-Assisted Remote Attackers to Bypass Restrictions and to Execute Code, Medium
Vupen: ADV-2008-1749

scip Labs: https://www.scip.ch/en/?labs.20140918
See also: 🔍

Entryinfo

Created: 03/16/2015 17:00
Updated: 08/11/2019 17:09
Changes: 03/16/2015 17:00 (68), 08/11/2019 17:09 (11)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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