Cryptocat up to 2.0.41 Group Chat Private Key Generator multiparty.js missing encryption

Summaryinfo

A vulnerability identified as critical has been detected in Cryptocat up to 2.0.41. This affects an unknown function of the file cryptocatRandom.js/multiparty.js of the component Group Chat Private Key Generator. The manipulation leads to missing encryption. This vulnerability is uniquely identified as CVE-2013-2257. Moreover, an exploit is present. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Cryptocat up to 2.0.41 and classified as critical. This issue affects some unknown functionality of the file cryptocatRandom.js/multiparty.js of the component Group Chat Private Key Generator. The manipulation with an unknown input leads to a missing encryption vulnerability. Using CWE to declare the problem leads to CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. Impacted is confidentiality, and integrity.

The weakness was disclosed 04/19/2013 by Steve Thomas as confirmed blog post (Website). It is possible to read the advisory at tobtu.com. The public release has been coordinated in cooperation with the project team. The identification of this vulnerability is CVE-2013-2257 since 02/19/2013. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept.

Upgrading to version 2.0.42 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at OSVDB (94855†). scmagazine.com is providing further details. The entry VDB-144834 is pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• Cryptocat

Version

• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3
• 2.0.4
• 2.0.5
• 2.0.6
• 2.0.7
• 2.0.8
• 2.0.9
• 2.0.10
• 2.0.11
• 2.0.12
• 2.0.13
• 2.0.14
• 2.0.15
• 2.0.16
• 2.0.17
• 2.0.18
• 2.0.19
• 2.0.20
• 2.0.21
• 2.0.22
• 2.0.23
• 2.0.24
• 2.0.25
• 2.0.26
• 2.0.27
• 2.0.28
• 2.0.29
• 2.0.30
• 2.0.31
• 2.0.32
• 2.0.33
• 2.0.34
• 2.0.35
• 2.0.36
• 2.0.37
• 2.0.38
• 2.0.39
• 2.0.40
• 2.0.41

License

• free

Website

• Product: https://github.com/cryptocat/cryptocat/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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