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MS KB2661254: Update For Minimum Certificate Key Length

medium Nessus Plugin ID 62466

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Synopsis

The remote Windows host is configured to trust SSL/TLS certificates with weak keys.

Description

The remote host is missing Microsoft KB2661254. This update restricts the use of RSA keys less than 1024 bits in length. Keys of shorter lengths are more susceptible to brute-force attacks, which could allow a man-in-the-middle attacker to intercept and/or modify data encrypted over SSL/TLS.

Solution

Microsoft has released a set of patches for Windows XP, 2003, Vista, 2008, 7, and 2008 R2.

Please note this update could cause applications or services (e.g., email, signed applications, private PKI) to stop working in some environments. Refer to the Microsoft advisory for more information.

See Also

https://docs.microsoft.com/en-us/security-updates/SecurityAdvisories/2012/2661254

https://support.microsoft.com/en-us/help/2661254/microsoft-security-advisory-update-for-minimum-certificate-key-length

Plugin Details

Severity: Medium

ID: 62466

File Name: smb_kb2661254.nasl

Version: 1.5

Type: local

Agent: windows

Family: Windows

Published: 10/10/2012

Updated: 11/15/2018

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N

Vulnerability Information

CPE: cpe:/o:microsoft:windows

Required KB Items: SMB/Registry/Enumerated, SMB/WindowsVersion

Patch Publication Date: 8/14/2012

Reference Information

MSKB: 2661254