A vulnerability classified as critical has been found in Asylo up to 0.5.x. This affects the function enc_untrusted_recvfrom. The manipulation as part of a Return Value leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A buffer length validation vulnerability in Asylo versions prior to 0.6.0 allows an attacker to read data they should not have access to. The 'enc_untrusted_recvfrom' function generates a return value which is deserialized by 'MessageReader', and copied into three different 'extents'. The length of the third 'extents' is controlled by the outside world, and not verified on copy, allowing the attacker to force Asylo to copy trusted memory data into an untrusted buffer of significantly small length.. We recommend updating Asylo to version 0.6.0 or later.

The weakness was released 08/12/2020 (GitHub Repository). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2020-8905 since 02/12/2020. It is possible to initiate the attack remotely. The successful exploitation requires a authentication. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 0.6.0 eliminates this vulnerability.

Entry connected to this vulnerability is available at 159830.

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• Asylo

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5

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• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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