|Date: (C)2013-03-15 (M)2015-12-16|
|CVSS Score: 6.6||Access Vector: NETWORK|
|Exploitability Subscore: 4.9||Access Complexity: HIGH|
|Impact Subscore: 8.5||Authentication: NONE|
| ||Confidentiality: PARTIAL|
| ||Integrity: PARTIAL|
| ||Availability: COMPLETE|
stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.