Executive Summary
Summary | |
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Title | openssl-blacklist update |
Informations | |||
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Name | USN-612-9 | First vendor Publication | 2008-06-12 |
Vendor | Ubuntu | Last vendor Modification | 2008-06-12 |
Severity (Vendor) | N/A | Revision | N/A |
Security-Database Scoring CVSS v3
Cvss vector : N/A | |||
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Overall CVSS Score | NA | ||
Base Score | NA | Environmental Score | NA |
impact SubScore | NA | Temporal Score | NA |
Exploitabality Sub Score | NA | ||
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : | |||
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Cvss Base Score | Not Defined | Attack Range | Not Defined |
Cvss Impact Score | Not Defined | Attack Complexity | Not Defined |
Cvss Expoit Score | Not Defined | Authentication | Not Defined |
Calculate full CVSS 2.0 Vectors scores |
Detail
A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 7.04 Ubuntu 7.10 Ubuntu 8.04 LTS This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: Ubuntu 7.04: Ubuntu 7.10: Ubuntu 8.04 LTS: In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: USN-612-3 addressed a weakness in OpenSSL certificate and key generation in OpenVPN by introducing openssl-blacklist to aid in detecting vulnerable private keys. This update enhances the openssl-vulnkey tool to check Certificate Signing Requests, accept input from STDIN, and check moduli without a certificate. It was also discovered that additional moduli are vulnerable if generated with OpenSSL 0.9.8g or higher. While it is believed that there are few of these vulnerable moduli in use, this update includes updated RSA-1024 and RSA-2048 blacklists. RSA-512 blacklists are also included in the new openssl-blacklist-extra package. You can check for weak SSL/TLS certificates by installing openssl-blacklist via your package manager, and using the openssl-vulnkey command. $ openssl-vulnkey /path/to/certificate_or_key $ cat /path/to/certificate_or_key | openssl-vulnkey - You can also check if a modulus is vulnerable by specifying the modulus and number of bits. $ openssl-vulnkey -b bits -m modulus These commands can be used on public certificates, requests, and private keys for any X.509 certificate, CSR, or RSA key, including ones for web servers, mail servers, OpenVPN, and others. If in doubt, destroy the certificate and key and generate new ones. Please consult the documentation for your software when recreating SSL/TLS certificates. Also, if certificates have been generated for use on other systems, they must be found and replaced as well. Original advisory details: |
Original Source
Url : http://www.ubuntu.com/usn/USN-612-9 |
Alert History
Date | Informations |
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2014-02-17 12:05:08 |
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2013-02-06 19:08:31 |
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