#VU7230 Stack-based buffer overflow in Skype - CVE-2017-9948

Vulnerability identifier: #VU7230

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-9948

CWE-ID: CWE-121

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Skype
Client/Desktop applications / Messaging software

Vendor: Microsoft

Description
The vulnerability allows a local attacker to execute arbitrary code on the target system.

The weakness exists due to stack-based buffer overflow in the `MSFTEDIT.DLL` when handling RDP clipboard content within the message box. A local attacker can trigger memory corruption and execute arbitrary code with system privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update to version 7.37.178.

Vulnerable software versions

Skype: 7.2 - 7.36

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External links
https://www.vulnerability-db.com/?q=articles/2017/05/28/stack-buffer-overflow-zero-day-vulnerability...
https://www.vulnerability-lab.com/get_content.php?id=2071

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.