Ubisoft Uplay Desktop Client 63.0.5699.0 URI upc.exe input validation

Summaryinfo

A vulnerability, which was classified as critical, has been found in Ubisoft Uplay Desktop Client 63.0.5699.0. The impacted element is an unknown function of the file upc.exe of the component URI Handler. The manipulation leads to input validation. This vulnerability is uniquely identified as CVE-2018-15832. The attack is possible to be carried out remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability was found in Ubisoft Uplay Desktop Client 63.0.5699.0. It has been rated as critical. This issue affects an unknown functionality of the file upc.exe of the component URI Handler. 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:

upc.exe in Ubisoft Uplay Desktop Client versions 63.0.5699.0 allows remote attackers to execute arbitrary code. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the processing of URI handlers. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code under the context of the current process.

The bug was discovered 09/18/2018. The weakness was disclosed 09/20/2018 as EDB-ID 45429 as not defined exploit (Exploit-DB). It is possible to read the advisory at exploit-db.com. The identification of this vulnerability is CVE-2018-15832 since 08/23/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details as well as a public exploit are known.

After immediately, there has been an exploit disclosed. The exploit is available at exploit-db.com. 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 $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371212 (Ubisoft Uplay Desktop Client Remote Code Execution Vulnerability).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (45429). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Ubisoft

Name

• Uplay Desktop Client

Version

• 63.0.5699.0

CPE 2.3info

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CPE 2.2info

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

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