Arbitrary code execution in Microsoft Skype

1) Stack-based buffer overflow

EUVDB-ID: #VU7230

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 - Stack-based buffer overflow

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:microsoft:skype:7.2:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:skype:7.35:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:skype:7.36:*:*:*:*:*:*:*

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

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.